16009( 11) - 17-Dec-2019 17:21:51 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16009 Version: 11 Check-in Time: 17-Dec-2019 17:21:51 STScI Edit Number: 0 Title Interstellar Object C/2019 Q4 ------------------------------------------------------------------------------------ Type Cycle GO/DD 27 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. David Jewitt University of California - Los Angeles Y CoI: Dr. Harold A. Weaver The Johns Hopkins University Applied Y Physics Laboratory CoI: Max Mutchler Space Telescope Science Institute Y CoI: Dr. Jessica Agarwal Max Planck Institute for Solar System Y Research CoI: Dr. Yoonyoung Kim Max Planck Institute for Solar System N Research CoI: Dr. Man-To Hui University of Hawaii N ------------------------------------------------------------------------------------ Abstract Newly announced comet C/2019 Q4 is the second detected interstellar object in the solar system, with the unprecedented eccentricity e = 3.08. It is likely a comet ejected from the circumplanetary formation environment of another star. We propose early-time HST observations to provide a baseline characterization of the object, addressing several issues raised by 'Oumuamua, the first such object. HST is uniquely capable of isolating the nucleus from the coma and so providing the best measure of its dimensions. The size will enable an improved estimate of the number density and total mass of interstellar bodies, needed to confront formation models. Time-resolved measurements will show whether or not Q4 exhibits an extreme lightcurve, as did 'Oumuamua, with the superb HST resolution reducing the confounding effects of near-nucleus coma on the measured amplitude. The morphology of ejected dust, and its temporal variation under a range of viewing geometries, will reveal dust particle and ejection properties through the application of a sophisticated 3D dust dynamics model. The observations proposed here will cover the period before perihelion, and provide a rational basis for planning additional observations in 2020, should they be necessary. ------------------------------------------------------------------------------------ Observations Description ------------------------ We request 7 orbits with WFC3 and the F350LP filter to image C/2019 Q4. The broad F350LP filter gives maximum sensitivity to faint coma. The seven orbits would be used as follows. The initial four consecutive orbits will provide a 7 hour lightcurve of the embedded nucleus. This will immediately show whether or not there is a large amplitude lightcurve of the 'Oumuamua type (the latter had m = 2.5 magnitudes with a 8 hour (double-peaked) period). Establishing this fact will immediately address the question of whether extreme shapes are somehow a feature of interstellar objects (a possibility for which several theories have already been proposed, e.g. Vavilov and Medvedev 2019). The four orbits will also permit deep imaging of the coma and high signal-to-noise profile construction, the latter needed for the best nucleus extraction. The 16009( 11) - 17-Dec-2019 17:21:51 - [ 2] coma imaging, from a perspective ~11 degrees below the orbit plane, will provide input to our Monte-Carlo dust dynamics model. Three additional orbits are requested spaced by about one month from the initial four. These orbits will provide additional perspectives on the dust distribution, needed to limit the dust properties. In addition, these orbits will enable measurement of longer-term changes in this unique target. Depending on what the HST shows, these proposed observations may provide a platform for additional requests. For example, if the body disintegrates, we would propose for additional observations to characterize this process. As a secondary benefit, sub-arcsecond astrometry from all 6 orbits will assist with orbit fitting and the search for non-gravitational acceleration, as was the case for 'Oumuamua (Micheli et al. 2018). The science objectives cannot be met using other facilities. We need Hubble's high angular resolution and stable point-spread function (PSF) to photometrically isolate the nucleus from surrounding dust. The object leaves the 55 deg exclusion zone on 2019 October 8. Being the first such object caught pre-perihelion, we are uncertain about its evolution, including the possibility of disintegration (c.f. Sekanina 2018, Jewitt et al 2019). Early scheduling would be advantageous to determine the morphology as a baseline for future measurements, and as insurance against sudden thermal shock destruction of the object. This geometry will provide the best separation of syndyne and synchrone (Finson and Probstein 1968) type dust trajectories and hence the best constraints on the particle size (note: radiation pressure induces size-dependent spatial separation of particles in the orbital plane, which cannot be observed when the out-of-plane angle is small). geometry strongly favors early observation. The science objectives benefit from orbits #1 through #4 executing as soon as possible by providing improved signal-to-noise ratios and bullet-proof cosmic ray rejection. This is important for the dust modeling given the reported small scale of the dust (few arcsec) and the rapid decrease of surface brightness with distance. High SNR is important in the application of our profile-fitting model, which fits and makes an extrapolation of the coma inwards to extract from the nucleus+coma image. For example, the online exposure time calculator indicates that at 28.5 mag arcsec-2, we achieve SNR ~ 5 per pixel in four orbits (6 images per orbit of 300s each in F350LP). High SNR is also important in the search for companions. In four orbits, we reach V ~ 28.2 at SNR = 5 according to the ETC. The angle of the Earth above the orbit plane determines the extent to which the orbit-plane distribution of dust can be inferred. In addition, the time baseline of orbits #1 - #4 provides our best constraint on the nucleus shape. The additional orbits #5, #6 and #7 should be spaced from the first and from each other by about one month, in order to examine the target from a varying out-of-plane perspective and to assess temporal changes. The current 1-sigma ephemeris uncertainty exceeds the acceptable 10 arcsec by mid-October owing to the short arc of observations available at the time of writing this proposal (Sep 11). However, as with all high profile targets, this will shrink as additional astrometry is continuously included in the fit, including our own measurements to be acquired in scheduled time at the Kitt Peak 0.9-m and NOT 2.4-m. Ephemeris accuracy for HST observations is expected to remain at the 1 sigma = 1 arcsec level, of no concern to these observations. We understand that we will have essentially no control over the spacecraft roll angle, which means that we will not be able to optimize the orientation of the dust coma on the CCD (e.g., to orient the tail along the longest dimension of the detector). However, the field-of-view of the WFC3 2k subarray is large enough and the target coma small enough that we should obtain excellent data, no matter what spacecraft roll 16009( 11) - 17-Dec-2019 17:21:51 - [ 3] angle is used. ------------------------------------------------------------------------------------ 16009( 11) - 17-Dec-2019 17:21:51 - [ 4] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: C2019-Q4 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: COMET Interstellar comet ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=COMET, Q=2.008117570265085, E=3.360320629591126, I=44.03901258700353 , O=308.1591586745812, W=209.0829393013172, T=08-DEC-2019:12:35:50, TTimeScale=TDB, EQUINOX=J2000, EPOCH=12-SEP-2019:00:00:00, EpochTimeScale=TDB ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 17.5 +/- 3 Ephemeris Center: EARTH Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 2 TARGET NAME: C12019-Q4-V5 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: COMET Interstellar comet ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=COMET, Q=2.005818383084455, E=3.353491649120846, I=44.05785522652224 , O=308.1419761457706, W=209.1427356972629, T=08-DEC-2019:13:49:13, TTimeScale=TDB, EQUINOX=J2000, EPOCH=21-SEP-2019:00:00:00, EpochTimeScale=TDB ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 17 +/- 2 Ephemeris Center: EARTH Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 16009( 11) - 17-Dec-2019 17:21:51 - [ 5] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 4 TARGET NAME: C2019-Q4-V6 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: COMET Interstellar comet ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=COMET, Q=2.006657665923882, E=3.357489728570803, I=44.05175011952899 , O=308.1488660165818, W=209.1176753018978, T=08-DEC-2019:13:03:06, TTimeScale=TDB, EQUINOX=J2000, EPOCH=20-DEC-2019:00:00:00, EpochTimeScale=TDB, A1=3.370896911621E-7, A2=2.360367965698E-7, A3=0. ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 16 +/- 2 Ephemeris Center: EARTH Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 16009( 11) - 17-Dec-2019 17:21:51 - [ 6] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 5 TARGET NAME: C2019-Q4-V7 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: COMET Interstellar comet ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 TYPE=COMET, Q=2.006646919889602, E=3.357489316443313, I=44.05247152804048 , O=308.1494484383344, W=209.1223857291233, T=08-DEC-2019:13:12:54, TTimeScale=TDB, EQUINOX=J2000, EPOCH=20-DEC-2019:00:00:00, EpochTimeScale=TDB, A1=2.001994848251E-8, A2=1.551358127594E-7, A3=-7.238847255707E-8 ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 16 +/- 2 Ephemeris Center: EARTH Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 16009( 11) - 17-Dec-2019 17:21:51 - [ 7] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.8 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 45 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 16009( 11) - 17-Dec-2019 17:21:51 - [ 8] Visit: 01 Visit Requirements: BEFORE 13-OCT-2019:00:00:00 On Hold Comments: Additional Comments: 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 C2019-Q4 WFC3/UVI ACCUM UVIS2-2K2 F350LP CR-SPLIT=NO 3 260 S PATTERN 2 1 S C-SUB (1560 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 1 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 2 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 3 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 1 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 2 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 3 none 1 N/A S 2C-SUB 16009( 11) - 17-Dec-2019 17:21:51 - [ 9] Visit: 02 Visit Requirements: AFTER 01 BY 0.8 Orbits TO 1.2 Orbits On Hold Comments: Additional Comments: 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 C2019-Q4 WFC3/UVI ACCUM UVIS2-2K2 F350LP CR-SPLIT=NO 3 260 S POS TARG 0.2, 0; PATTERN S C-SUB (1560 S) 2 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 1 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 2 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 3 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 1 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 2 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 3 none 1 N/A S 2C-SUB 16009( 11) - 17-Dec-2019 17:21:51 - [ 10] Visit: 03 Visit Requirements: AFTER 01 BY 2.8 Orbits TO 3.2 Orbits On Hold Comments: Additional Comments: 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 C2019-Q4 WFC3/UVI ACCUM UVIS2-2K2 F350LP CR-SPLIT=NO 3 260 S POS TARG 0.4, 0; PATTERN S C-SUB (1560 S) 2 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 1 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 2 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 3 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 1 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 2 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 3 none 1 N/A S 2C-SUB 16009( 11) - 17-Dec-2019 17:21:51 - [ 11] Visit: 04 Visit Requirements: AFTER 01 BY 3.8 Orbits TO 4.2 Orbits On Hold Comments: Additional Comments: 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 C2019-Q4 WFC3/UVI ACCUM UVIS2-2K2 F350LP CR-SPLIT=NO 3 260 S POS TARG 0.6, 0; PATTERN S C-SUB (1560 S) 2 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 1 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 2 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 3 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 1 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 2 none 1 N/A S 2C-SUB C2019-Q4 1 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 3 none 1 N/A S 2C-SUB 16009( 11) - 17-Dec-2019 17:21:51 - [ 12] Visit: 05 Visit Requirements: BETWEEN 11-NOV-2019:00:00:00 AND 18-NOV-2019:00:00:00 On Hold Comments: Additional Comments: 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 C12019-Q4-V WFC3/UVI ACCUM UVIS2-2K2 F350LP CR-SPLIT=NO, FLASH=9 1 30 S (30 5 S C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 C12019-Q4-V WFC3/UVI ACCUM UVIS2-2K2 F350LP CR-SPLIT=NO 3 230 S PATTERN 2 2 5 S C-SUB (1380 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ C12019-Q4-V5 1 WFC3/UVI ACCUM UVIS2-2K F350LP none none none none 1 N/A S 2C-SUB C12019-Q4-V5 2 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 1 none 1 N/A S 2C-SUB C12019-Q4-V5 2 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 2 none 1 N/A S 2C-SUB C12019-Q4-V5 2 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 3 none 1 N/A S 2C-SUB C12019-Q4-V5 2 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 1 none 1 N/A S 2C-SUB C12019-Q4-V5 2 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 2 none 1 N/A S 2C-SUB C12019-Q4-V5 2 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 3 none 1 N/A S 2C-SUB 16009( 11) - 17-Dec-2019 17:21:51 - [ 13] Visit: 06 Visit Requirements: BETWEEN 07-DEC-2019:13:00:00 AND 09-DEC-2019:12:30:00 On Hold Comments: Additional Comments: 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 C2019-Q4-V6 WFC3/UVI ACCUM UVIS2-2K2 F350LP CR-SPLIT=NO, FLASH=9 1 30 S (30 S C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 C2019-Q4-V6 WFC3/UVI ACCUM UVIS2-2K2 F350LP CR-SPLIT=NO 3 230 S PATTERN 2 2 S C-SUB (1380 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ C2019-Q4-V6 1 WFC3/UVI ACCUM UVIS2-2K F350LP none none none none 1 N/A S 2C-SUB C2019-Q4-V6 2 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 1 none 1 N/A S 2C-SUB C2019-Q4-V6 2 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 2 none 1 N/A S 2C-SUB C2019-Q4-V6 2 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 3 none 1 N/A S 2C-SUB C2019-Q4-V6 2 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 1 none 1 N/A S 2C-SUB C2019-Q4-V6 2 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 2 none 1 N/A S 2C-SUB C2019-Q4-V6 2 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 3 none 1 N/A S 2C-SUB 16009( 11) - 17-Dec-2019 17:21:51 - [ 14] Visit: 07 Visit Requirements: BETWEEN 01-JAN-2020:00:00:00 AND 06-JAN-2020:00:00:00 On Hold Comments: Additional Comments: 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 C2019-Q4-V7 WFC3/UVI ACCUM UVIS2-2K2 F350LP CR-SPLIT=NO, FLASH=9 1 30 S (30 SEQ 1-2 NON-INT S C-SUB S) ------------------------------------------------------------------------------------------------------------------------------------ 2 C2019-Q4-V7 WFC3/UVI ACCUM UVIS2-2K2 F350LP CR-SPLIT=NO 3 230 S PATTERN 2 2 S C-SUB (1380 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ C2019-Q4-V7 1 WFC3/UVI ACCUM UVIS2-2K F350LP none none none none 1 N/A S 2C-SUB C2019-Q4-V7 2 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 1 none 1 N/A S 2C-SUB C2019-Q4-V7 2 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 2 none 1 N/A S 2C-SUB C2019-Q4-V7 2 WFC3/UVI ACCUM UVIS2-2K F350LP 1 none 3 none 1 N/A S 2C-SUB C2019-Q4-V7 2 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 1 none 1 N/A S 2C-SUB C2019-Q4-V7 2 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 2 none 1 N/A S 2C-SUB C2019-Q4-V7 2 WFC3/UVI ACCUM UVIS2-2K F350LP 2 none 3 none 1 N/A S 2C-SUB 16009( 11) - 17-Dec-2019 17:21:51 - [ 15] Summary Form for Proposal 16009 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2-2K2C-SUB ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO, FLASH=9 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 0.8 Orbits TO 1.2 Orbits, AFTER 01 BY 2.8 Orbits TO 3.2 Orbits, AFTER 01 BY 3.8 Orbits TO 4.2 Orbits, BEFORE 13-OCT-2019:00:00:00, BETWEEN 01-JAN-2020:00:00:00 AND 06-JAN-2020:00:00:00, BETWEEN 07-DEC-2019:13:00:00 AND 09-DEC-2019:12:30:00, BETWEEN 11-NOV-2019:00:00:00 AND 18-NOV-2019:00:00:00, PATTERN 2 1, PATTERN 2 2, POS TARG 0.2, 0, POS TARG 0.4, 0, POS TARG 0.6, 0, SEQ 1-2 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F350LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names C12019-Q4-V5, C2019-Q4, C2019-Q4-V6, C2019-Q4-V7 ------------------------------------------------------------------------------------------------------------------------------------