16039( 9) - 30-Jan-2023 16:02:07 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16039 Version: 9 Check-in Time: 30-Jan-2023 16:02:07 STScI Edit Number: 2 Title Characterizing the outstanding super-Earth LTT 1445Ab ------------------------------------------------------------------------------------ Type Cycle GO 27 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. David K. Sing The Johns Hopkins University Y CoI: Zafar Rustamkulov The Johns Hopkins University N CoI: Dr. Hannah Wakeford University of Bristol N CoI: Dr. Joshua D. Lothringer Utah Valley University N CoI: Dr. Jessica Spake California Institute of Technology N CoI: Prof. Nathan J Mayne University of Exeter N CoI: Dr. Kevin Stevenson The Johns Hopkins University Applied N Physics Laboratory ------------------------------------------------------------------------------------ Abstract TESS has recently discovered LTT 1445Ab, a small transiting exoplanet with a radius of only slightly larger than Earth. The planet orbits a mid-type M-dwarf star every 5.35 days, giving it a relatively cool equilibrium temperature of 433 K. The planet is very close to Earth, at a distance of only 6.9 pc, which makes it an extremely good target for atmospheric characterization due to the brightness of its host star and relatively large atmospheric signal. The planet is so close that it is likely the closest transiting planet that will ever be found around a mid-type M-dwarf, making it a rare case where a near-Earth size exoplanet can be characterized. Recent discoveries of water in the atmospheres around two similar planets in M-dwarf systems indicate many of these small transiting planets have hydrogen-rich atmospheres detectable with HST. Our program will measure HST/WFC3 spectroscopy of LTT 1445Ab to measure its broadband transmission spectrum from 0.3 to 1.7 microns. We will use the atmospheric information to help distinguish the exoplanet as a super-Earth with a compact secondary atmosphere from a hydrogen-rich sub-Neptune. With all three WFC3 grisms, a continuous transmission spectrum can be measured where Rayleigh scattering, CH4, and H2O can be constrained. The new, extraordinary planet LTT 1445Ab offers a rare chance to study a nearly Earth-sized exoplanet across the full optical to infrared spectrum, pushing these measurements to a largely unexplored regime of smaller, cooler exoplanets. ------------------------------------------------------------------------------------ Observations Description ------------------------ This program uses all three UVIS and IR WFC3 slitless spectrographs to obtain an exoplanet transmission spectrum of LTT1445A covering 0.2 to 1.7 microns. Four transits observations are required, which consist of three or four consecutive HST orbits each. Phase constraints have been set in the aquisition image of each visit to observe the transit near the middle of the visits. A companion binary LTT1445BC is located 7" distant, and roll restrictions have been added such that the spectra will not overlap. We will use the WFC3 G280 grism to obtain spectra covering 0.2 to 1 micron. We 16039( 9) - 30-Jan-2023 16:02:07 - [ 2] have estimated the exposure times using the STScI ETC, and will adopt 190 second exposures. As buffer dumps are an important issue with UVIS, we will use sub-arrays to increase duty cycle. Sub-array sizes of 590x2250 limits the overheads between exposures, and contains the entire useable spectrum as well as the binary BC pair. Using APT, we found 11 exposures-per-orbit can be obtained, and we will require 3-orbit long visits to measure both the transit and have sufficient baseline flux out of transit to characterize potential detector systematics. The WFC3 IR uses spatial scanning to increase the SNR. The G141 uses a 5.1" scan at 0.53 arcsec/sec, with roll restrictions such that the LTT1445BC pair does not overlap the scan of target LTT1445A. The G102 uses a 6" scan at 0.2691 arcsec/sec, also with roll restrictions. The G102 was divided into four consecutive HST visits in order to force buffer dumps at the end of each orbit. For these four visits, timing requiremnts have been put in place such that they are exectued consecutively. Impact of reduced gyro operations. Our WFC3/IR observations use spacial scanning, however the scans of both visits are less than 5 arsec/sec so reduced gyro operaion should have no effect on the ability to spactially scan. Two strategies can be employed to increase scheduablity. For both the IR and UVIS, the phase constraintes can be loosened by an additional 10 to 15 minutes with only a modest loss to SNR. Secondly, the roll constraints can be relaxed. The current roll restrictions of all visits are set to optimally separate the binary star such that the spectra do not overlap. For the UVIS, loostening up the high angle phase contraint first would be preferable as the contaminating spectra would affect primarly the -1 order, which has lower throughput. In loostening the roll restrictions in the IR observations, the binary star spectra could still be separted from the primary if the scan was shortened, or if the exposure levels and scan length was changed such that each star could be well resolved in a single Nsamp subexposure. This would likely result in a modest loss to the SNR. ------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 LTT-1445A EXT-STAR, EXTRA-SOLAR RA=03H01M51.3900S, J2000 V = 11.22 Ic = 8.66 PLANETARY SYSTEM, M DEC=-16D35'36.02" V-IV Reference Frame: Other: SIMBAD Comments: Winters et al 2019 and Gaia DR2 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015.5 -0.025673833390558235 -0.26815 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 4] Visit: 01 (LTT1445A WFC3/G141 Orbit 1) Visit Requirements: SCHED 100%; ORIENT 53D TO 126 D; ORIENT 233D TO 306 D; Period 5.35882 D AND ZERO-PHASE HJD2458423.42629 On Hold Comments: Additional Comments: WFC3/G141 time series transit observations consisiting of four consecutive HST orbits. Visits LTT1145A WFC3/G141 1, 2, 3 and 4 must be scheduled consecutively. The visits have been broken up in APT to force a buffer dump at the end of each orbit, which drastically increases the duty cycle, which is important for time-series observations. -7" offset has been applied such that the target spatial scan is near the middle of the 256 subarray. This provides room for a companion star to appear either above or below the target, depending on the roll angle. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LTT-1445A WFC3/IR MULTIAC GRISM256 F132N SAMP-SEQ=RAPID, NSAMP=2 1 DEF (0.556 POS TARG null, -7; PHASE CUM S) 0.9700649272290043 TO 0.9739525990174454; SEQ 1-2 NON-INT Comments: Filter image to assist with wavelength calibration. Saturated, but the image is only used to find the reference detctor possition. ------------------------------------------------------------------------------------------------------------------------------------ 2 LTT-1445A WFC3/IR MULTIAC GRISM256 G141 SAMP-SEQ=SPARS5, NSAMP=5 23 DEF POS TARG null, -7; CUM (445.111 SPATIAL SCAN 0.531317, S) 90.0 Degrees, Round trip ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 F132N none none none none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 5] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 9 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 9 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 10 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 10 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 11 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 11 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 12 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 12 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 13 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 13 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 14 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 14 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 15 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 15 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 16 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 6] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 16 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 17 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 17 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 18 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 18 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 19 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 19 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 20 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 20 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 21 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 21 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 22 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 22 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 23 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G141 none none 23 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 7] Visit: 02 (LTT1445A WFC3/G141 Orbit 2) Visit Requirements: SCHED 100%; SAME ORIENT AS 01; AFTER 01 BY 0.9 Orbits TO 1.1 Orbits On Hold Comments: Additional Comments: Second orbit of G102 transit. Must be scheduled directly after LTT1445A WFC3/G102 Orbit 1 (02). Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LTT-1445A WFC3/IR MULTIAC GRISM256 G141 SAMP-SEQ=SPARS5, NSAMP=5 24 DEF POS TARG null, -7; CUM (464.463 SPATIAL SCAN 0.531317, S) 90.0 Degrees, Round trip; SEQ 1 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 8] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 9 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 9 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 10 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 10 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 11 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 11 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 12 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 12 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 13 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 13 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 14 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 14 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 15 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 15 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 16 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 16 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 17 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 17 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 18 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 18 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 19 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 19 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 20 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 9] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 20 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 21 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 21 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 22 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 22 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 23 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 23 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 24 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 24 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 10] Visit: 03 (LTT1445A WFC3/G141 Orbit 3) Visit Requirements: SCHED 100%; SAME ORIENT AS 01; AFTER 02 BY 0.9 Orbits TO 1.1 Orbits On Hold Comments: Additional Comments: Third orbit of G102 transit. Must be scheduled directly after LTT1445A WFC3/G102 Orbit 2 (02). Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LTT-1445A WFC3/IR MULTIAC GRISM256 G141 SAMP-SEQ=SPARS5, NSAMP=5 24 DEF POS TARG null, -7; CUM (464.463 SPATIAL SCAN 0.531317, S) 90.0 Degrees, Round trip; SEQ 1 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 11] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 9 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 9 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 10 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 10 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 11 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 11 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 12 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 12 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 13 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 13 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 14 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 14 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 15 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 15 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 16 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 16 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 17 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 17 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 18 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 18 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 19 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 19 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 20 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 12] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 20 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 21 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 21 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 22 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 22 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 23 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 23 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 24 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 24 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 13] Visit: 04 (LTT1445A WFC3/G141 Orbit 4) Visit Requirements: SCHED 100%; SAME ORIENT AS 01; AFTER 03 BY 0.9 Orbits TO 1.1 Orbits On Hold Comments: Additional Comments: Fourth orbit of G102 transit. Must be scheduled directly after LTT1445A WFC3/G102 Orbit 3 (03). Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LTT-1445A WFC3/IR MULTIAC GRISM256 G141 SAMP-SEQ=SPARS5, NSAMP=5 24 DEF POS TARG null, -7; CUM (464.463 SPATIAL SCAN 0.531317, S) 90.0 Degrees, Round trip; SEQ 1 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 1 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 2 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 3 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 4 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 5 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 6 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 7 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 14] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 8 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 9 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 9 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 10 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 10 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 11 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 11 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 12 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 12 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 13 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 13 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 14 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 14 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 15 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 15 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 16 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 16 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 17 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 17 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 18 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 18 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 19 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 19 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 20 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 15] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 20 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 21 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 21 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 22 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 22 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 23 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 23 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 24 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G141 none none 24 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 16] Visit: 05 (LTT1445A WFC3/G102 Orbit 1) Visit Requirements: SCHED 100%; ORIENT 68D TO 112 D; ORIENT 248D TO 292 D; Period 5.35882 D AND ZERO-PHASE HJD2458423.42629 On Hold Comments: Additional Comments: WFC3/G102 time series transit observations consisiting of four consecutive HST orbits. Visits LTT1145A WFC3/G102 5, 6, 7 and 8 must be scheduled consecutively. The visits have been broken up in APT to force a buffer dump at the end of each orbit, which drastically increases the duty cycle, which is important for time-series observations. -7" offset has been applied such that the target spatial scan is near the middle of the 256 subarray. This provides room for a companion star to appear either above or below the target, depending on the roll angle. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LTT-1445A WFC3/IR MULTIAC GRISM256 F132N SAMP-SEQ=RAPID, NSAMP=2 1 DEF (0.556 POS TARG null, -7; PHASE CUM S) 0.9700649272290043 TO 0.9739525990174454; SEQ 1-2 NON-INT Comments: Filter image to assist with wavelength calibration. Saturated, but the image is only used to find the reference detctor possition. ------------------------------------------------------------------------------------------------------------------------------------ 2 LTT-1445A WFC3/IR MULTIAC GRISM256 G102 SAMP-SEQ=SPARS10, NSAMP=4 19 DEF POS TARG null, -7; CUM (848.056 SPATIAL SCAN 0.2691, S) 90.0 Degrees, Round trip Comments: For the target star, the Brightest Pixel (single exposure) is at 1.09 um with 50, 192.06. BC binary pair together is slightly dimmer at G102 wavelengths, so the max counts will be slightly less. The scan of 6" will provide ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 F132N none none none none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 17] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 10 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 10 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 11 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 11 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 12 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 12 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 13 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 13 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 14 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 14 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 18] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 15 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 15 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 16 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 16 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 17 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 17 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 18 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 18 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 19 none 1 N/A CUM LTT-1445A 2 WFC3/IR MULTIAC GRISM256 G102 none none 19 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 19] Visit: 06 (LTT1445A WFC3/G102 Orbit 2) Visit Requirements: SCHED 100%; SAME ORIENT AS 05; AFTER 05 BY 0.9 Orbits TO 1.1 Orbits On Hold Comments: Additional Comments: Second orbit of G102 transit. Must be scheduled directly after LTT1445A WFC3/G102 Orbit 1 (05). Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LTT-1445A WFC3/IR MULTIAC GRISM256 G102 SAMP-SEQ=SPARS10, NSAMP=4 20 DEF POS TARG null, -7; CUM (892.691 SPATIAL SCAN 0.2691, S) 90.0 Degrees, Round trip; SEQ 1 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 20] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 10 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 10 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 11 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 11 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 12 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 12 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 13 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 13 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 14 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 14 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 15 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 15 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 16 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 16 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 17 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 17 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 18 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 18 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 19 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 19 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 20 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 21] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 20 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 22] Visit: 07 (LTT1445A WFC3/G102 Orbit 3) Visit Requirements: SCHED 100%; SAME ORIENT AS 05; AFTER 06 BY 0.9 Orbits TO 1.1 Orbits On Hold Comments: Additional Comments: Third orbit of G102 transit. Must be scheduled directly after LTT1445A WFC3/G102 Orbit 2 (06). Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LTT-1445A WFC3/IR MULTIAC GRISM256 G102 SAMP-SEQ=SPARS10, NSAMP=4 20 DEF POS TARG null, -7; CUM (892.691 SPATIAL SCAN 0.2691, S) 90.0 Degrees, Round trip; SEQ 1 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 23] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 10 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 10 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 11 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 11 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 12 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 12 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 13 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 13 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 14 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 14 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 15 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 15 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 16 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 16 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 17 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 17 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 18 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 18 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 19 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 19 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 20 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 24] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 20 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 25] Visit: 08 (LTT1445A WFC3/G102 Orbit 4) Visit Requirements: SCHED 100%; SAME ORIENT AS 05; AFTER 07 BY 0.9 Orbits TO 1.1 Orbits On Hold Comments: Additional Comments: Fourth orbit of G102 transit. Must be scheduled directly after LTT1445A WFC3/G102 Orbit 3 (07). Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LTT-1445A WFC3/IR MULTIAC GRISM256 G102 SAMP-SEQ=SPARS10, NSAMP=4 20 DEF POS TARG null, -7; CUM (892.691 SPATIAL SCAN 0.2691, S) 90.0 Degrees, Round trip; SEQ 1 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 1 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 2 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 3 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 4 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 5 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 6 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 7 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 26] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 8 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 9 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 10 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 10 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 11 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 11 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 12 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 12 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 13 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 13 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 14 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 14 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 15 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 15 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 16 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 16 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 17 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 17 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 18 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 18 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 19 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 19 none 1 N/A CUM LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 20 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 27] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/IR MULTIAC GRISM256 G102 none none 20 none 1 N/A CUM 16039( 9) - 30-Jan-2023 16:02:07 - [ 28] Visit: 09 (LTT1445A WFC3/UVIS G280 Visit 3) Visit Requirements: SCHED 100%; ORIENT 38D TO 148 D; ORIENT 218D TO 328 D; BEFORE 24-NOV-2022:00:00:00; Period 5.35882 D AND ZERO-PHASE HJD2458423.42629 On Hold Comments: Additional Comments: The optional parameters SIZEAXIS1=2250 and SIZEAXIS2=590 are used for all exposures to minimize the data volume and hence time lost to buffer dumps. This is fine for the data that needs to be obtained because the spectum of LTT1445A will occupy only a narrow swath of pixel rows within the field. This also requires the use of optional parameters CENTERAXIS1 and CENTERAXIS2 in order to "steer" the location of the subarray readout so that it is centered on the target spectrum. If we were positioning on chip 1 we could set CENTERAXIS2=TARGET. However, for the field center (nominal "UVIS" aperture) location on chip 2, we cannot center the subarray on the target because this would cause the subarray to extend into the chip gap, so we hardwire CENTERAXIS1=2136 and CENTERAXIS2=1216, which is intende to put the vertical center of the subarray on the zeroth order of the target spectrum. Chip 2 biases are taken at the end of the visit because the grism exposures use custom subarrays, which will not have matching biases from the WFC3 bias calibration program. For each visit we have phase constraints around the event of the planetary transit, both the orbital period of the planet and the phasing needed are placed on the first exposure in the sequence for each visit. As this target has a potential binary star companion 7" away which can contaminate the spectra, we have placed Orient Ranges for the observations to reach our science goals. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 29] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LTT-1445A WFC3/UVI ACCUM G280-REF F467M FLASH=12, SIZEAXIS2=590, 1 4 S (4 S) POS TARG null, -50.0; S CENTERAXIS2=1216, PHASE 0.9700 TO 0.97395; SIZEAXIS1=2250, SEQ 1-2 NON-INT CENTERAXIS1=2136 Comments: Nominal "UVIS" aperture is ~10" above the chip gap on chip 1; a Y-postarg of about -50" places the target near the center of subarray on chip 2. SIZEAXIS1=2250 and SIZEAXIS2=590 are used to minimize data volume, while CENTERAXIS1 and CENTERAXIS2 are used to center the subarray readout on the zeroth order of G280 spectrum. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288 but have been adjusted to better center the zeroth order spectrum on the sub-array. We use FLASH=12 to meet the nominal count level. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288. ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 30] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 2 LTT-1445A WFC3/UVI ACCUM UVIS G280 SIZEAXIS2=590, SIZEAXIS1=2250, 9 195 S POS TARG null, -50.0 S CENTERAXIS1=2136, (1755 S) CENTERAXIS2=1216 Comments: Nominal "UVIS" aperture is ~10" above the chip gap on chip 1; a Y-postarg of about -50" places the target near the center of subarray on chip 2. SIZEAXIS1=2250 and SIZEAXIS2=590 are used to minimize data volume, while CENTERAXIS1 and CENTERAXIS2 are used to center the subarray readout on the zeroth order of G280 spectrum. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288 but have been adjusted to better center the zeroth order spectrum on the sub-array. Exposure times of 191 seconds have been chosen to expose the region of interest (0.2 to 0.7 microns) to ~2/3 well depth. The ETC predicts that the star will saturate over four or five pixels of the spectra near 0.74 microns. As linearity for photometry holds to levels better than 1% generally for UVIS2 to well beyond saturation, we will simply sum over the few pixels that have been bled into as a result of over-saturation, as recomended in ISR-WFC3-2010-10. These longer integration times are prefereable over shorter exposure times, as the overall duty cycle and final SNR levels are higher. ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 31] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 3 LTT-1445A WFC3/UVI ACCUM UVIS G280 SIZEAXIS2=590, SIZEAXIS1=2250, 10 195 S POS TARG null, -50.0; S CENTERAXIS1=2136, (1950 S) SEQ 3 NON-INT CENTERAXIS2=1216 Comments: Nominal "UVIS" aperture is ~10" above the chip gap on chip 1; a Y-postarg of about -50" places the target near the center of subarray on chip 2. SIZEAXIS1=2250 and SIZEAXIS2=590 are used to minimize data volume, while CENTERAXIS1 and CENTERAXIS2 are used to center the subarray readout on the zeroth order of G280 spectrum. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288 but have been adjusted to better center the zeroth order spectrum on the sub-array. Exposure times of 191 seconds have been chosen to expose the region of interest (0.2 to 0.7 microns) to ~2/3 well depth. The ETC predicts that the star will saturate over four or five pixels of the spectra near 0.74 microns. As linearity for photometry holds to levels better than 1% generally for UVIS2 to well beyond saturation, we will simply sum over the few pixels that have been bled into as a result of over-saturation, as recomended in ISR-WFC3-2010-10. These longer integration times are prefereable over shorter exposure times, as the overall duty cycle and final SNR levels are higher. ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 32] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 4 LTT-1445A WFC3/UVI ACCUM UVIS G280 SIZEAXIS2=590, SIZEAXIS1=2250, 10 195 S POS TARG null, -50.0; S CENTERAXIS1=2136, (1950 S) SEQ 4-5 NON-INT CENTERAXIS2=1216 Comments: Nominal "UVIS" aperture is ~10" above the chip gap on chip 1; a Y-postarg of about -50" places the target near the center of subarray on chip 2. SIZEAXIS1=2250 and SIZEAXIS2=590 are used to minimize data volume, while CENTERAXIS1 and CENTERAXIS2 are used to center the subarray readout on the zeroth order of G280 spectrum. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288 but have been adjusted to better center the zeroth order spectrum on the sub-array. Exposure times of 191 seconds have been chosen to expose the region of interest (0.2 to 0.7 microns) to ~2/3 well depth. The ETC predicts that the star will saturate over four or five pixels of the spectra near 0.74 microns. As linearity for photometry holds to levels better than 1% generally for UVIS2 to well beyond saturation, we will simply sum over the few pixels that have been bled into as a result of over-saturation, as recomended in ISR-WFC3-2010-10. These longer integration times are prefereable over shorter exposure times, as the overall duty cycle and final SNR levels are higher. ------------------------------------------------------------------------------------------------------------------------------------ 5 BIAS WFC3/UVI ACCUM UVIS DEF SIZEAXIS2=590, SIZEAXIS1=2250, 4 0.0 S (0 S CENTERAXIS1=2136, S) CENTERAXIS2=1216 Comments: We set up the bias frames based on previously sucessful program 11934 and are using the same Aperture and subarray size and position as the observations for direct calibration. ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 33] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/UVI ACCUM G280-REF F467M none none none none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 1 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 2 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 3 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 4 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 5 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 6 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 7 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 8 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 9 none 1 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 1 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 2 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 3 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 4 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 5 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 6 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 7 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 8 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 9 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 10 none 2 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 1 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 2 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 3 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 4 none 3 N/A S 16039( 9) - 30-Jan-2023 16:02:07 - [ 34] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 5 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 6 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 7 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 8 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 9 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 10 none 3 N/A S BIAS 5 WFC3/UVI ACCUM UVIS DEF none none 1 none 3 N/A S BIAS 5 WFC3/UVI ACCUM UVIS DEF none none 2 none 3 N/A S BIAS 5 WFC3/UVI ACCUM UVIS DEF none none 3 none 3 N/A S BIAS 5 WFC3/UVI ACCUM UVIS DEF none none 4 none 3 N/A S 16039( 9) - 30-Jan-2023 16:02:07 - [ 35] Visit: 10 (LTT1445A WFC3/UVIS G280 Visit 4) Visit Requirements: SCHED 100%; ORIENT 38D TO 148 D; ORIENT 218D TO 328 D; BEFORE 24-NOV-2022:00:00:00; Period 5.35882 D AND ZERO-PHASE HJD2458423.42629 On Hold Comments: Additional Comments: Idential to vist 3 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LTT-1445A WFC3/UVI ACCUM G280-REF F467M FLASH=12, SIZEAXIS2=590, 1 4 S (4 S) POS TARG null, -50.0; S CENTERAXIS2=1216, PHASE 0.98244058 TO SIZEAXIS1=2250, 0.98639058; SEQ 1-2 CENTERAXIS1=2136 NON-INT Comments: Nominal "UVIS" aperture is ~10" above the chip gap on chip 1; a Y-postarg of about -50" places the target near the center of subarray on chip 2. SIZEAXIS1=2250 and SIZEAXIS2=590 are used to minimize data volume, while CENTERAXIS1 and CENTERAXIS2 are used to center the subarray readout on the zeroth order of G280 spectrum. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288 but have been adjusted to better center the zeroth order spectrum on the sub-array. We use FLASH=12 to meet the nominal count level. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288. ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 36] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 2 LTT-1445A WFC3/UVI ACCUM UVIS G280 SIZEAXIS2=590, SIZEAXIS1=2250, 9 195 S POS TARG null, -50.0 S CENTERAXIS1=2136, (1755 S) CENTERAXIS2=1216 Comments: Nominal "UVIS" aperture is ~10" above the chip gap on chip 1; a Y-postarg of about -50" places the target near the center of subarray on chip 2. SIZEAXIS1=2250 and SIZEAXIS2=590 are used to minimize data volume, while CENTERAXIS1 and CENTERAXIS2 are used to center the subarray readout on the zeroth order of G280 spectrum. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288 but have been adjusted to better center the zeroth order spectrum on the sub-array. Exposure times of 191 seconds have been chosen to expose the region of interest (0.2 to 0.7 microns) to ~2/3 well depth. The ETC predicts that the star will saturate over four or five pixels of the spectra near 0.74 microns. As linearity for photometry holds to levels better than 1% generally for UVIS2 to well beyond saturation, we will simply sum over the few pixels that have been bled into as a result of over-saturation, as recomended in ISR-WFC3-2010-10. These longer integration times are prefereable over shorter exposure times, as the overall duty cycle and final SNR levels are higher. ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 37] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 3 LTT-1445A WFC3/UVI ACCUM UVIS G280 SIZEAXIS2=590, SIZEAXIS1=2250, 10 195 S POS TARG null, -50.0; S CENTERAXIS1=2136, (1950 S) SEQ 3 NON-INT CENTERAXIS2=1216 Comments: Nominal "UVIS" aperture is ~10" above the chip gap on chip 1; a Y-postarg of about -50" places the target near the center of subarray on chip 2. SIZEAXIS1=2250 and SIZEAXIS2=590 are used to minimize data volume, while CENTERAXIS1 and CENTERAXIS2 are used to center the subarray readout on the zeroth order of G280 spectrum. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288 but have been adjusted to better center the zeroth order spectrum on the sub-array. Exposure times of 191 seconds have been chosen to expose the region of interest (0.2 to 0.7 microns) to ~2/3 well depth. The ETC predicts that the star will saturate over four or five pixels of the spectra near 0.74 microns. As linearity for photometry holds to levels better than 1% generally for UVIS2 to well beyond saturation, we will simply sum over the few pixels that have been bled into as a result of over-saturation, as recomended in ISR-WFC3-2010-10. These longer integration times are prefereable over shorter exposure times, as the overall duty cycle and final SNR levels are higher. ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 38] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 4 LTT-1445A WFC3/UVI ACCUM UVIS G280 SIZEAXIS2=590, SIZEAXIS1=2250, 10 195 S POS TARG null, -50.0; S CENTERAXIS1=2136, (1950 S) SEQ 4-5 NON-INT CENTERAXIS2=1216 Comments: Nominal "UVIS" aperture is ~10" above the chip gap on chip 1; a Y-postarg of about -50" places the target near the center of subarray on chip 2. SIZEAXIS1=2250 and SIZEAXIS2=590 are used to minimize data volume, while CENTERAXIS1 and CENTERAXIS2 are used to center the subarray readout on the zeroth order of G280 spectrum. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288 but have been adjusted to better center the zeroth order spectrum on the sub-array. Exposure times of 191 seconds have been chosen to expose the region of interest (0.2 to 0.7 microns) to ~2/3 well depth. The ETC predicts that the star will saturate over four or five pixels of the spectra near 0.74 microns. As linearity for photometry holds to levels better than 1% generally for UVIS2 to well beyond saturation, we will simply sum over the few pixels that have been bled into as a result of over-saturation, as recomended in ISR-WFC3-2010-10. These longer integration times are prefereable over shorter exposure times, as the overall duty cycle and final SNR levels are higher. ------------------------------------------------------------------------------------------------------------------------------------ 5 BIAS WFC3/UVI ACCUM UVIS DEF SIZEAXIS2=590, SIZEAXIS1=2250, 4 0.0 S (0 S CENTERAXIS1=2136, S) CENTERAXIS2=1216 Comments: We set up the bias frames based on previously sucessful program 11934 and are using the same Aperture and subarray size and position as the observations for direct calibration. ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 39] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/UVI ACCUM G280-REF F467M none none none none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 1 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 2 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 3 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 4 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 5 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 6 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 7 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 8 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 9 none 1 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 1 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 2 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 3 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 4 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 5 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 6 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 7 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 8 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 9 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 10 none 2 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 1 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 2 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 3 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 4 none 3 N/A S 16039( 9) - 30-Jan-2023 16:02:07 - [ 40] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 5 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 6 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 7 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 8 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 9 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 10 none 3 N/A S BIAS 5 WFC3/UVI ACCUM UVIS DEF none none 1 none 3 N/A S BIAS 5 WFC3/UVI ACCUM UVIS DEF none none 2 none 3 N/A S BIAS 5 WFC3/UVI ACCUM UVIS DEF none none 3 none 3 N/A S BIAS 5 WFC3/UVI ACCUM UVIS DEF none none 4 none 3 N/A S 16039( 9) - 30-Jan-2023 16:02:07 - [ 41] Visit: 59 (LTT1445A WFC3/UVIS G280 Visit 55-58) Visit Requirements: SCHED 100%; ORIENT 38D TO 148 D; ORIENT 218D TO 328 D; Period 5.35882 D AND ZERO-PHASE HJD2458423.42629 On Hold Comments: Additional Comments: Copied from Visit 3, replaces G102 visits 55-58 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LTT-1445A WFC3/UVI ACCUM G280-REF F467M FLASH=12, SIZEAXIS2=590, 1 4 S (4 S) POS TARG null, -50.0; S CENTERAXIS2=1216, PHASE 0.9700649272290043 SIZEAXIS1=2250, TO 0.9739525990174454; CENTERAXIS1=2136 SEQ 1-2 NON-INT Comments: Nominal "UVIS" aperture is ~10" above the chip gap on chip 1; a Y-postarg of about -50" places the target near the center of subarray on chip 2. SIZEAXIS1=2250 and SIZEAXIS2=590 are used to minimize data volume, while CENTERAXIS1 and CENTERAXIS2 are used to center the subarray readout on the zeroth order of G280 spectrum. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288 but have been adjusted to better center the zeroth order spectrum on the sub-array. We use FLASH=12 to meet the nominal count level. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288. ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 42] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 2 LTT-1445A WFC3/UVI ACCUM UVIS G280 SIZEAXIS2=590, SIZEAXIS1=2250, 9 185.5 S POS TARG null, -50.0 S CENTERAXIS1=2136, (1669.5 S) CENTERAXIS2=1216 Comments: Nominal "UVIS" aperture is ~10" above the chip gap on chip 1; a Y-postarg of about -50" places the target near the center of subarray on chip 2. SIZEAXIS1=2250 and SIZEAXIS2=590 are used to minimize data volume, while CENTERAXIS1 and CENTERAXIS2 are used to center the subarray readout on the zeroth order of G280 spectrum. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288 but have been adjusted to better center the zeroth order spectrum on the sub-array. Exposure times of 191 seconds have been chosen to expose the region of interest (0.2 to 0.7 microns) to ~2/3 well depth. The ETC predicts that the star will saturate over four or five pixels of the spectra near 0.74 microns. As linearity for photometry holds to levels better than 1% generally for UVIS2 to well beyond saturation, we will simply sum over the few pixels that have been bled into as a result of over-saturation, as recomended in ISR-WFC3-2010-10. These longer integration times are prefereable over shorter exposure times, as the overall duty cycle and final SNR levels are higher. ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 43] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 3 LTT-1445A WFC3/UVI ACCUM UVIS G280 SIZEAXIS2=590, SIZEAXIS1=2250, 10 185.5 S POS TARG null, -50.0; S CENTERAXIS1=2136, (1855 S) SEQ 3 NON-INT CENTERAXIS2=1216 Comments: Nominal "UVIS" aperture is ~10" above the chip gap on chip 1; a Y-postarg of about -50" places the target near the center of subarray on chip 2. SIZEAXIS1=2250 and SIZEAXIS2=590 are used to minimize data volume, while CENTERAXIS1 and CENTERAXIS2 are used to center the subarray readout on the zeroth order of G280 spectrum. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288 but have been adjusted to better center the zeroth order spectrum on the sub-array. Exposure times of 191 seconds have been chosen to expose the region of interest (0.2 to 0.7 microns) to ~2/3 well depth. The ETC predicts that the star will saturate over four or five pixels of the spectra near 0.74 microns. As linearity for photometry holds to levels better than 1% generally for UVIS2 to well beyond saturation, we will simply sum over the few pixels that have been bled into as a result of over-saturation, as recomended in ISR-WFC3-2010-10. These longer integration times are prefereable over shorter exposure times, as the overall duty cycle and final SNR levels are higher. ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 44] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 4 LTT-1445A WFC3/UVI ACCUM UVIS G280 SIZEAXIS2=590, SIZEAXIS1=2250, 10 185.5 S POS TARG null, -50.0; S CENTERAXIS1=2136, (1855 S) SEQ 4 NON-INT CENTERAXIS2=1216 Comments: Nominal "UVIS" aperture is ~10" above the chip gap on chip 1; a Y-postarg of about -50" places the target near the center of subarray on chip 2. SIZEAXIS1=2250 and SIZEAXIS2=590 are used to minimize data volume, while CENTERAXIS1 and CENTERAXIS2 are used to center the subarray readout on the zeroth order of G280 spectrum. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288 but have been adjusted to better center the zeroth order spectrum on the sub-array. Exposure times of 191 seconds have been chosen to expose the region of interest (0.2 to 0.7 microns) to ~2/3 well depth. The ETC predicts that the star will saturate over four or five pixels of the spectra near 0.74 microns. As linearity for photometry holds to levels better than 1% generally for UVIS2 to well beyond saturation, we will simply sum over the few pixels that have been bled into as a result of over-saturation, as recomended in ISR-WFC3-2010-10. These longer integration times are prefereable over shorter exposure times, as the overall duty cycle and final SNR levels are higher. ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 45] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 5 LTT-1445A WFC3/UVI ACCUM UVIS G280 SIZEAXIS2=590, SIZEAXIS1=2250, 10 185.5 S POS TARG null, -50.0; S CENTERAXIS1=2136, (1855 S) SEQ 5-6 NON-INT CENTERAXIS2=1216 Comments: Nominal "UVIS" aperture is ~10" above the chip gap on chip 1; a Y-postarg of about -50" places the target near the center of subarray on chip 2. SIZEAXIS1=2250 and SIZEAXIS2=590 are used to minimize data volume, while CENTERAXIS1 and CENTERAXIS2 are used to center the subarray readout on the zeroth order of G280 spectrum. These parameters are based upon similar observations obtained successfully in GOs 13574 & 15288 but have been adjusted to better center the zeroth order spectrum on the sub-array. Exposure times of 191 seconds have been chosen to expose the region of interest (0.2 to 0.7 microns) to ~2/3 well depth. The ETC predicts that the star will saturate over four or five pixels of the spectra near 0.74 microns. As linearity for photometry holds to levels better than 1% generally for UVIS2 to well beyond saturation, we will simply sum over the few pixels that have been bled into as a result of over-saturation, as recomended in ISR-WFC3-2010-10. These longer integration times are prefereable over shorter exposure times, as the overall duty cycle and final SNR levels are higher. ------------------------------------------------------------------------------------------------------------------------------------ 6 BIAS WFC3/UVI ACCUM UVIS DEF SIZEAXIS2=590, SIZEAXIS1=2250, 4 0.0 S (0 S CENTERAXIS1=2136, S) CENTERAXIS2=1216 Comments: We set up the bias frames based on previously sucessful program 11934 and are using the same Aperture and subarray size and position as the observations for direct calibration. ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ 16039( 9) - 30-Jan-2023 16:02:07 - [ 46] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 1 WFC3/UVI ACCUM G280-REF F467M none none none none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 1 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 2 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 3 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 4 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 5 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 6 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 7 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 8 none 1 N/A S LTT-1445A 2 WFC3/UVI ACCUM UVIS G280 none none 9 none 1 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 1 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 2 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 3 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 4 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 5 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 6 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 7 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 8 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 9 none 2 N/A S LTT-1445A 3 WFC3/UVI ACCUM UVIS G280 none none 10 none 2 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 1 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 2 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 3 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 4 none 3 N/A S 16039( 9) - 30-Jan-2023 16:02:07 - [ 47] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 5 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 6 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 7 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 8 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 9 none 3 N/A S LTT-1445A 4 WFC3/UVI ACCUM UVIS G280 none none 10 none 3 N/A S LTT-1445A 5 WFC3/UVI ACCUM UVIS G280 none none 1 none 4 N/A S LTT-1445A 5 WFC3/UVI ACCUM UVIS G280 none none 2 none 4 N/A S LTT-1445A 5 WFC3/UVI ACCUM UVIS G280 none none 3 none 4 N/A S LTT-1445A 5 WFC3/UVI ACCUM UVIS G280 none none 4 none 4 N/A S LTT-1445A 5 WFC3/UVI ACCUM UVIS G280 none none 5 none 4 N/A S LTT-1445A 5 WFC3/UVI ACCUM UVIS G280 none none 6 none 4 N/A S LTT-1445A 5 WFC3/UVI ACCUM UVIS G280 none none 7 none 4 N/A S LTT-1445A 5 WFC3/UVI ACCUM UVIS G280 none none 8 none 4 N/A S LTT-1445A 5 WFC3/UVI ACCUM UVIS G280 none none 9 none 4 N/A S LTT-1445A 5 WFC3/UVI ACCUM UVIS G280 none none 10 none 4 N/A S BIAS 6 WFC3/UVI ACCUM UVIS DEF none none 1 none 4 N/A S BIAS 6 WFC3/UVI ACCUM UVIS DEF none none 2 none 4 N/A S BIAS 6 WFC3/UVI ACCUM UVIS DEF none none 3 none 4 N/A S BIAS 6 WFC3/UVI ACCUM UVIS DEF none none 4 none 4 N/A S 16039( 9) - 30-Jan-2023 16:02:07 - [ 48] Summary Form for Proposal 16039 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures G280-REF, GRISM256, UVIS ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CENTERAXIS1=2136, CENTERAXIS2=1216, FLASH=12, NSAMP=2, NSAMP=4, NSAMP=5, SAMP-SEQ=RAPID, SAMP-SEQ=SPARS10, SAMP-SEQ=SPARS5, SIZEAXIS1=2250, SIZEAXIS2=590 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 0.9 Orbits TO 1.1 Orbits, AFTER 02 BY 0.9 Orbits TO 1.1 Orbits, AFTER 03 BY 0.9 Orbits TO 1.1 Orbits, AFTER 05 BY 0.9 Orbits TO 1.1 Orbits, AFTER 06 BY 0.9 Orbits TO 1.1 Orbits, AFTER 07 BY 0.9 Orbits TO 1.1 Orbits, BEFORE 24-NOV-2022:00:00:00, ORIENT 218D TO 328 D, ORIENT 233D TO 306 D, ORIENT 248D TO 292 D, ORIENT 38D TO 148 D, ORIENT 53D TO 126 D, ORIENT 68D TO 112 D, PHASE 0.9700 TO 0.97395, PHASE 0.9700649272290043 TO 0.9739525990174454, PHASE 0.98244058 TO 0.98639058, POS TARG null, -50.0, POS TARG null, -7, Period 5.35882 D AND ZERO-PHASE HJD2458423.42629, Period 5.35882 D AND ZERO-PHASE HJD2458423.42629, SAME ORIENT AS 01, SAME ORIENT AS 05, SCHED 100%, SEQ 1 NON-INT, SEQ 1-2 NON-INT, SEQ 3 NON-INT, SEQ 4 NON-INT, SEQ 4-5 NON-INT, SEQ 5-6 NON-INT, SPATIAL SCAN 0.2691, 90.0 Degrees, Round trip, SPATIAL SCAN 0.531317, 90.0 Degrees, Round trip ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements DEF, F132N, F467M, G102, G141, G280 ------------------------------------------------------------------------------------------------------------------------------------ Target Names BIAS, LTT-1445A ------------------------------------------------------------------------------------------------------------------------------------