17745( 3) - 21-Aug-2024 15:54:35 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17745 Version: 3 Check-in Time: 21-Aug-2024 15:54:35 STScI Edit Number: 0 Title It Takes Two Planets to Tango: Constraining the Orbit of a Planetary-Mass Binary ------------------------------------------------------------------------------------ Type Cycle GO 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Christopher Theissen University of California - San Diego Y CoI: Dr. Luigi R. Bedin INAF - Osservatorio Astronomico di Padova N CoI: Prof. Adam J. Burgasser University of California - San Diego N CoI: Dr. Daniella Carolina Bardalez Amherst College N Gagliuffi CoI: Dr. Clemence Fontanive Universite de Montreal N CoI: Dr. Chih-Chun Hsu Northwestern University N CoI: Dr. Johanna Vos University of Dublin, Trinity College N ------------------------------------------------------------------------------------ Abstract We aim to measure the orbit of the plantary-mass (M < 13 M_Jup) binary WISE J135501.90-825838.9, the second-lowest mass (unresolved) binary currently known. This binary was first identified as a "spectral binary, " a composite object of two unresolved near-infrared spectra which have the features of two ultracool (T < 1300 K) objects combined into one spectrum. A preliminary RV and parallax solution place WISE 1355-8258 within the AB Doardus kinematic association (150-200 Myr). The WISE parallax + proper motion solution also shows a periodic astrometric signal in the residuals, which is likely due to the orbital motion of the binary. However, higher precision astrometry is needed to constrain the orbital parameters, which has an estimated period of P ~ 1116 days. Using HST/WFC3-UVIS we will obtain a precise astrometric solution for the parallax and proper motion, and constrain the orbital solution in the periodic motion of the astrometric residuals using 10 orbits over the next 2 cycles (6+4 orbits). These measurements will provide the first ever direct mass measurement of a planetary-mass binary. This system will be a touchstone benchmark system for models of planet formation and evolution. ------------------------------------------------------------------------------------ Observations Description ------------------------ Each orbit is spaced at least 2 months apart and is set to cover the longest time baseline possible within Cycle 32 while also offering higher coverage during the estimated maximum orbital separation of the two binary components. We are unable to cover the entire estimated orbital period of 1116 days, but we are able to cover approximately a third of the orbit which will allow us to put preliminary constraints on the orbital motion of the binary. We have 4 additional epochs in Cycle 33, which will allow us to constrain the orbital parameters to better than 1%. We have grouped epochs into 3 groups of 2 orbits, where each group of 2 orbits is taken within 1 month of each other, and each group is separated by 3 months, maximizing the time baseline of Cycle 32 (6 orbits total in Cycle 32). We will utilize an additional 4 orbits over the maximum time baseline of Cycle 33 to 17745( 3) - 21-Aug-2024 15:54:35 - [ 2] sample the majority of the estimated period. This strategy will also allow us to detect shorter and longer periods of orbital movement, between ~60--2000 days. The first epoch should be taken as early as possible (approximately November 28th, 2024), and the last epoch as late as possible (approximately October 31, 2025). We have created windows for each orgit that span ~20 days, offering flexibility in scheduling while also covering the requested time baseline for each epoch (orbit) and grouping of orbits. Each drift-scan image is taken along a principal axis of the detector. After each drift-scan image, we perform a large dither along the same axis and direction as the previous image before the next drift-scan image is taken along another principal axis. This effectively makes a box pattern which will help us reduce systematics. Each epoch contains two images in point source imaging mode, and four in spatial-scanning mode with WFC3/UVIS. In addition to the images taken in spatial scan mode using F775W which will be used for absolute astrometry, we will take two short exposure (100s) point-source images at the beginning and at the end of the single orbit visits in F775W and F606W. These snapshots will provide information about calibrator source color, which is paramount to discriminate object type and distance of the reference sources in the field. ------------------------------------------------------------------------------------ 17745( 3) - 21-Aug-2024 15:54:35 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 2MASS-J13550 STAR, BROWN DWARF, RA=13H55M1.9050S +/- 0.1594", J2000 V = 18.2 +/- 1 J=16.135+-0.128; 323-8258375 EXTRA-SOLAR PLANET DEC=-82D58'38.96" +/- 0.1600" H=15.310+-0.132; K=14.721+-0.137 Reference Frame: ICRS Extended: NO Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2010 -0.13523170462682976 -0.161 0.062 ------------------------------------------------------------------------------------------------------------------------------------ 17745( 3) - 21-Aug-2024 15:54:35 - [ 4] Visit: 01 (Epoch 1) Visit Requirements: BETWEEN 28-NOV-2024:00:00:00 AND 11-DEC-2024:00:00:00 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 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=18 1 100 S POS TARG -4, 4 0323-825837 S see below 5 (100 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG -4, 4; SPATIAL 0323-825837 S see below SCAN 0.0013, 270.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 3 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG -4, -4; SPATIAL 0323-825837 S see below SCAN 0.0013, 0.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 4 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG 4, -4; SPATIAL 0323-825837 S see below SCAN 0.0013, 90.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 5 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG 4, 4; SPATIAL 0323-825837 S see below SCAN 0.0013, 180.0 5 (463 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 6 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F606W FLASH=18 1 100 S POS TARG -4, 4 0323-825837 S see below 5 (100 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 | ------------------------------------------------------------------------------------------------------------------------------------ 2MASS-J13550323-825 1 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 100 S 8375 S 2MASS-J13550323-825 2 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 3 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 4 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 5 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 463.0 S 8375 S 2MASS-J13550323-825 6 WFC3/UVI ACCUM UVIS1 F606W none none none none 1 100 S 8375 S 17745( 3) - 21-Aug-2024 15:54:35 - [ 5] Visit: 02 (Epoch 2) Visit Requirements: BETWEEN 11-JAN-2025:00:00:00 AND 24-JAN-2025:00:00:00 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 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=18 1 100 S POS TARG -4, 4 0323-825837 S see below 5 (100 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG -4, 4; SPATIAL 0323-825837 S see below SCAN 0.0013, 270.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 3 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG -4, -4; SPATIAL 0323-825837 S see below SCAN 0.0013, 0.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 4 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG 4, -4; SPATIAL 0323-825837 S see below SCAN 0.0013, 90.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 5 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG 4, 4; SPATIAL 0323-825837 S see below SCAN 0.0013, 180.0 5 (463 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 6 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F606W FLASH=18 1 100 S POS TARG -4, 4 0323-825837 S see below 5 (100 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 | ------------------------------------------------------------------------------------------------------------------------------------ 2MASS-J13550323-825 1 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 100.0 S 8375 S 2MASS-J13550323-825 2 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 3 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 4 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 5 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 463.0 S 8375 S 2MASS-J13550323-825 6 WFC3/UVI ACCUM UVIS1 F606W none none none none 1 100.0 S 8375 S 17745( 3) - 21-Aug-2024 15:54:35 - [ 6] Visit: 03 (Epoch 3) Visit Requirements: BETWEEN 11-APR-2025:00:00:00 AND 27-APR-2025:00:00:00 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 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=18 1 100 S POS TARG -4, 4 0323-825837 S see below 5 (100 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG -4, 4; SPATIAL 0323-825837 S see below SCAN 0.0013, 270.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 3 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG -4, -4; SPATIAL 0323-825837 S see below SCAN 0.0013, 0.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 4 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG 4, -4; SPATIAL 0323-825837 S see below SCAN 0.0013, 90.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 5 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG 4, 4; SPATIAL 0323-825837 S see below SCAN 0.0013, 180.0 5 (463 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 6 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F606W FLASH=18 1 100 S POS TARG -4, 4 0323-825837 S see below 5 (100 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 | ------------------------------------------------------------------------------------------------------------------------------------ 2MASS-J13550323-825 1 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 100.0 S 8375 S 2MASS-J13550323-825 2 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 3 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 4 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 5 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 463.0 S 8375 S 2MASS-J13550323-825 6 WFC3/UVI ACCUM UVIS1 F606W none none none none 1 100.0 S 8375 S 17745( 3) - 21-Aug-2024 15:54:35 - [ 7] Visit: 04 (Epoch 4) Visit Requirements: BETWEEN 29-MAY-2025:00:00:00 AND 13-JUN-2025:00:00:00 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 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=18 1 100 S POS TARG -4, 4 0323-825837 S see below 5 (100 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG -4, 4; SPATIAL 0323-825837 S see below SCAN 0.0013, 270.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 3 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG -4, -4; SPATIAL 0323-825837 S see below SCAN 0.0013, 0.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 4 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG 4, -4; SPATIAL 0323-825837 S see below SCAN 0.0013, 90.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 5 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG 4, 4; SPATIAL 0323-825837 S see below SCAN 0.0013, 180.0 5 (463 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 6 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F606W FLASH=18 1 100 S POS TARG -4, 4 0323-825837 S see below 5 (100 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 | ------------------------------------------------------------------------------------------------------------------------------------ 2MASS-J13550323-825 1 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 100 S 8375 S 2MASS-J13550323-825 2 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 3 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 4 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 5 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 463.0 S 8375 S 2MASS-J13550323-825 6 WFC3/UVI ACCUM UVIS1 F606W none none none none 1 100.0 S 8375 S 17745( 3) - 21-Aug-2024 15:54:35 - [ 8] Visit: 05 (Epoch 5) Visit Requirements: BETWEEN 04-SEP-2025:00:00:00 AND 17-SEP-2025:00:00:00 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 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=18 1 100 S POS TARG -4, 4 0323-825837 S see below 5 (100 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG -4, 4; SPATIAL 0323-825837 S see below SCAN 0.0013, 270.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 3 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG -4, -4; SPATIAL 0323-825837 S see below SCAN 0.0013, 0.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 4 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG 4, -4; SPATIAL 0323-825837 S see below SCAN 0.0013, 90.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 5 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG 4, 4; SPATIAL 0323-825837 S see below SCAN 0.0013, 180.0 5 (463 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 6 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F606W FLASH=18 1 100 S POS TARG -4, 4 0323-825837 S see below 5 (100 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 | ------------------------------------------------------------------------------------------------------------------------------------ 2MASS-J13550323-825 1 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 100 S 8375 S 2MASS-J13550323-825 2 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 3 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 4 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 5 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 463.0 S 8375 S 2MASS-J13550323-825 6 WFC3/UVI ACCUM UVIS1 F606W none none none none 1 100.0 S 8375 S 17745( 3) - 21-Aug-2024 15:54:35 - [ 9] Visit: 06 (Epoch 6) Visit Requirements: BETWEEN 22-OCT-2025:00:00:00 AND 31-OCT-2025:23:59:59 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 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=18 1 100 S POS TARG -4, 4 0323-825837 S see below 5 (100 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG -4, 4; SPATIAL 0323-825837 S see below SCAN 0.0013, 270.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 3 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG -4, -4; SPATIAL 0323-825837 S see below SCAN 0.0013, 0.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 4 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG 4, -4; SPATIAL 0323-825837 S see below SCAN 0.0013, 90.0 5 (464 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 5 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F775W FLASH=10 1 400 S POS TARG 4, 4; SPATIAL 0323-825837 S see below SCAN 0.0013, 180.0 5 (463 S) Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ 6 2MASS-J1355 WFC3/UVI ACCUM UVIS1 F606W FLASH=18 1 100 S POS TARG -4, 4 0323-825837 S see below 5 (100 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 | ------------------------------------------------------------------------------------------------------------------------------------ 2MASS-J13550323-825 1 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 100 S 8375 S 2MASS-J13550323-825 2 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 3 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464.0 S 8375 S 2MASS-J13550323-825 4 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 464 S 8375 S 2MASS-J13550323-825 5 WFC3/UVI ACCUM UVIS1 F775W none none none none 1 463.0 S 8375 S 2MASS-J13550323-825 6 WFC3/UVI ACCUM UVIS1 F606W none none none none 1 100.0 S 8375 S 17745( 3) - 21-Aug-2024 15:54:35 - [ 10] Summary Form for Proposal 17745 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=10, FLASH=18 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 04-SEP-2025:00:00:00 AND 17-SEP-2025:00:00:00, BETWEEN 11-APR-2025:00:00:00 AND 27-APR-2025:00:00:00, BETWEEN 11-JAN-2025:00:00:00 AND 24-JAN-2025:00:00:00, BETWEEN 22-OCT-2025:00:00:00 AND 31-OCT-2025:23:59:59, BETWEEN 28-NOV-2024:00:00:00 AND 11-DEC-2024:00:00:00, BETWEEN 29-MAY-2025:00:00:00 AND 13-JUN-2025:00:00:00, POS TARG -4, -4, POS TARG -4, 4, POS TARG 4, -4, POS TARG 4, 4, SPATIAL SCAN 0.0013, 0.0 Degrees, Forward, SPATIAL SCAN 0.0013, 180.0 Degrees, Forward, SPATIAL SCAN 0.0013, 270.0 Degrees, Forward, SPATIAL SCAN 0.0013, 90.0 Degrees, Forward ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F606W, F775W ------------------------------------------------------------------------------------------------------------------------------------ Target Names 2MASS-J13550323-8258375 ------------------------------------------------------------------------------------------------------------------------------------