18436( 5) - 16-Oct-2026 19:52:56 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 18436 Version: 5 Check-in Time: 16-Oct-2026 19:52:56 STScI Edit Number: 1 Title Imaging Six Young Planetary-Mass Companions with HST/WFC3-UVIS ------------------------------------------------------------------------------------ Type Cycle GO 34 ------------------------------------------------------------------------------------ Investigators Contact? PI: Lillian Yushu Jiang University of California - Santa Barbara Y CoI: Dr. Brendan Bowler University of California - Santa Barbara N CoI: Dr. Michael C. Liu University of Hawaii N CoI: Claire Finley University of California - Santa Barbara N ------------------------------------------------------------------------------------ Abstract Young giant planets encode their formation histories in their accretion history, but recovering accretion rates requires isolating the accretion continuum. The missing piece is UV coverage: only the UV Balmer continuum directly traces Lacc and the shock temperature structure, avoiding the order-of-magnitude uncertainty in current Halpha-based bolometric corrections. We propose consecutive-orbit HST/WFC3/UVIS imaging in F336W and F656N for six wide-orbit planetary-mass companions (3-18 MJup, q~0.005-0.08) spanning BD to K-type hosts. This program will (1) distinguish planetary-shock from magnetospheric accretion; and (2) anchor the LHalpha-Lacc relation across a broad host-mass range, providing the bolometric correction needed for current and upcoming Halpha surveys with MagAO-X, MUSE, and the ELT. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will observe six systems with WFC3/UVIS using two consecutive orbits per system. The primary goals are to measure the Balmer-continuum excess with F336W, H-alpha emission with F656N, and the companion photospheric emission with F555W together with either F775W or F850LP. The bright host stars are intentionally allowed to saturate, and repeated exposures use a three-point dither pattern. The allowed telescope orientation ranges are selected to prevent saturated-host bleeding columns from overlapping the companions while retaining broad scheduling flexibility. ROXs 12, YSES 1, and ITG 15 are observed with F336W, F656N, F555W, and F775W. Their exposure times are designed to detect the companion photosphere at signal-to-noise ratios greater than 5 in both continuum filters. Kointreau-1 and Kointreau-3 are highly extincted, so F336W and F555W are omitted. F850LP provides the photospheric anchor, and the remaining time is assigned to F656N. ROXs 42B has relatively low extinction, but an F555W detection would require too much observing time. We therefore obtain a signal-to-noise ratio greater than 5 in F775W and use the remaining time to strengthen the F336W and especially the F656N constraints. Post-flash levels are selected to produce a total background of approximately 20 electrons per pixel and reduce charge-transfer-efficiency losses. 18436( 5) - 16-Oct-2026 19:52:56 - [ 2] **************************2026-10-14 update*************************** KOINTREAU-3 b, ITG 15B, and ROXs 12 B cannot be scheduled. TTRB approved KOINTREAU-4 b as a replacement for one of these targets. We propose to retain the original two-orbit setup for YSES 1, allocate two orbits to KOINTREAU-4 b, and observe KOINTREAU-1 and ROXs 42B twice each, repeating their respective two-orbit setups. The total remains 12 orbits. To avoid the known bad columns in the UVIS2-C512C-SUB aperture, we added small POS TARG offsets. ORIENT constraints are included; TTRB previously approved the use of orientation restrictions. **************************2026-10-16 update*************************** K1 Visits 01 and 02 now use POS TARG (+0.50, 0.00) arcsec and U3 ORIENT 164.2-174.6 degree. ------------------------------------------------------------------------------------ 18436( 5) - 16-Oct-2026 19:52:56 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 KOINTREAU-1 STAR, EXTRA-SOLAR RA=04H33M26.2192S, J2000 G = 16.52 mag PLANETARY SYSTEM, LOW DEC=+22D45'29.26" MASS COMPANION, PRE-MAIN SEQUENCE STAR, YSO Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 6.434266003599132E-4 -0.016525999922123447 0.0062913 ------------------------------------------------------------------------------------------------------------------------------------ 4 YSES-1 STAR, EXTRA-SOLAR RA=13H25M12.1263S, J2000 V = 11.12 PLANETARY SYSTEM, LOW DEC=-64D56'20.69" MASS COMPANION, PRE-MAIN SEQUENCE STAR, YSO Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 -0.006452278251415972 -0.017733999970914738 0.0106124 ------------------------------------------------------------------------------------------------------------------------------------ 18436( 5) - 16-Oct-2026 19:52:56 - [ 4] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 6 ROXS-42B STAR, EXTRA-SOLAR RA=16H31M15.0183S, J2000 V = 14.27 PLANETARY SYSTEM, LOW DEC=-24D32'43.72" MASS COMPANION, PRE-MAIN SEQUENCE STAR Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. SIMBAD listed proper motion for this target. When retrieving targets with PM from SIMBAD, APT requests the coordinates be calculated with an epoch of the year 2000. Do not modify this epoch. Always review coordinates using the Target Confirmation tool, which graphically displays the PM. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 -4.2009670509298255E-4 -0.02336600002763589 0.0068284 ------------------------------------------------------------------------------------------------------------------------------------ 7 KOINTREAU-4 STAR, EXTRA-SOLAR RA=16H26M27.8595S, J2000 Host Gaia G=14.057 mag; host PLANETARY SYSTEM, LOW DEC=-26D25'15.18" K_MKO=9.82 mag. Companion J_MKO=16.67, MASS COMPANION, H_MKO=16.28, K_MKO=15.6 mag. PRE-MAIN SEQUENCE STAR, YSO Reference Frame: ICRS Comments: New target for scheduling tests. Host coordinates and proper motion from SIMBAD queried 2026-10-05, ICRS epoch J2000, Gaia EDR3 2020yCat.1350....0G. Companion rho=1.257 arcsec and PA=302.6 deg at 2025-07-01 (Walker et al. 2026, arXiv:2602.10198v2). Host A_K=0.06 mag; companion extinction not independently measured. Host-centered pointing. Target Confirmation and guide-star check pending. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 -5.312938327230395E-4 -0.02618 0.0070475 ------------------------------------------------------------------------------------------------------------------------------------ 18436( 5) - 16-Oct-2026 19:52:56 - [ 5] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE-3PT Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.135 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 18436( 5) - 16-Oct-2026 19:52:56 - [ 6] Visit: 01 Visit Requirements: ORIENT 164.2D TO 174.6 D; VISIBILITY INTERVAL 48 M 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 KOINTREAU-1 WFC3/UVI ACCUM UVIS2-C51 F850LP FLASH=20 1 90 S (270 POS TARG 0.50, 0.00; S 2C-SUB S) PATTERN 1 1 Comments: Orbit 1: 3 x 90 s F850LP; FLASH=20. ------------------------------------------------------------------------------------------------------------------------------------ 2 KOINTREAU-1 WFC3/UVI ACCUM UVIS2-C51 F656N FLASH=18 1 656 S POS TARG 0.50, 0.00; S 2C-SUB (1968 S) PATTERN 1 2 Comments: Orbit 1: 3 x 656 s F656N; FLASH=18. ------------------------------------------------------------------------------------------------------------------------------------ 3 KOINTREAU-1 WFC3/UVI ACCUM UVIS2-C51 F656N FLASH=18 1 810 S POS TARG 0.50, 0.00; S 2C-SUB (2430 S) PATTERN 1 3 Comments: Orbit 2: 3 x 810 s F656N; FLASH=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 | ------------------------------------------------------------------------------------------------------------------------------------ KOINTREAU-1 1 WFC3/UVI ACCUM UVIS2-C5 F850LP 1 none none none 1 N/A S 12C-SUB KOINTREAU-1 1 WFC3/UVI ACCUM UVIS2-C5 F850LP 2 none none none 1 N/A S 12C-SUB KOINTREAU-1 1 WFC3/UVI ACCUM UVIS2-C5 F850LP 3 none none none 1 N/A S 12C-SUB KOINTREAU-1 2 WFC3/UVI ACCUM UVIS2-C5 F656N 1 none none none 1 N/A S 12C-SUB KOINTREAU-1 2 WFC3/UVI ACCUM UVIS2-C5 F656N 2 none none none 1 N/A S 12C-SUB KOINTREAU-1 2 WFC3/UVI ACCUM UVIS2-C5 F656N 3 none none none 1 N/A S 12C-SUB KOINTREAU-1 3 WFC3/UVI ACCUM UVIS2-C5 F656N 1 none none none 2 N/A S 12C-SUB KOINTREAU-1 3 WFC3/UVI ACCUM UVIS2-C5 F656N 2 none none none 2 N/A S 12C-SUB KOINTREAU-1 3 WFC3/UVI ACCUM UVIS2-C5 F656N 3 none none none 2 N/A S 12C-SUB 18436( 5) - 16-Oct-2026 19:52:56 - [ 7] Visit: 02 Visit Requirements: ORIENT 164.2D TO 174.6 D; VISIBILITY INTERVAL 48 M 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 KOINTREAU-1 WFC3/UVI ACCUM UVIS2-C51 F850LP FLASH=20 1 90 S (270 POS TARG 0.50, 0.00; S 2C-SUB S) PATTERN 1 1 Comments: Orbit 1: 3 x 90 s F850LP; FLASH=20. ------------------------------------------------------------------------------------------------------------------------------------ 2 KOINTREAU-1 WFC3/UVI ACCUM UVIS2-C51 F656N FLASH=19 1 656 S POS TARG 0.50, 0.00; S 2C-SUB (1968 S) PATTERN 1 2 Comments: Orbit 1: 3 x 656 s F656N; FLASH=19. ------------------------------------------------------------------------------------------------------------------------------------ 3 KOINTREAU-1 WFC3/UVI ACCUM UVIS2-C51 F656N FLASH=18 1 810 S POS TARG 0.50, 0.00; S 2C-SUB (2430 S) PATTERN 1 3 Comments: Orbit 2: 3 x 810 s F656N; FLASH=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 | ------------------------------------------------------------------------------------------------------------------------------------ KOINTREAU-1 1 WFC3/UVI ACCUM UVIS2-C5 F850LP 1 none none none 1 N/A S 12C-SUB KOINTREAU-1 1 WFC3/UVI ACCUM UVIS2-C5 F850LP 2 none none none 1 N/A S 12C-SUB KOINTREAU-1 1 WFC3/UVI ACCUM UVIS2-C5 F850LP 3 none none none 1 N/A S 12C-SUB KOINTREAU-1 2 WFC3/UVI ACCUM UVIS2-C5 F656N 1 none none none 1 N/A S 12C-SUB KOINTREAU-1 2 WFC3/UVI ACCUM UVIS2-C5 F656N 2 none none none 1 N/A S 12C-SUB KOINTREAU-1 2 WFC3/UVI ACCUM UVIS2-C5 F656N 3 none none none 1 N/A S 12C-SUB KOINTREAU-1 3 WFC3/UVI ACCUM UVIS2-C5 F656N 1 none none none 2 N/A S 12C-SUB KOINTREAU-1 3 WFC3/UVI ACCUM UVIS2-C5 F656N 2 none none none 2 N/A S 12C-SUB KOINTREAU-1 3 WFC3/UVI ACCUM UVIS2-C5 F656N 3 none none none 2 N/A S 12C-SUB 18436( 5) - 16-Oct-2026 19:52:56 - [ 8] Visit: 03 Visit Requirements: ORIENT 42.7D TO 68.1 D; ORIENT 88.2D TO 112.5 D; ORIENT 132.7D TO 202.5 D; ORIENT 222.7D TO 248.1 D; ORIENT 268.2D TO 292.5 D; ORIENT 312.7D TO 22.5 D On Hold Comments: Additional Comments: KOINTREAU-4: two orbits; POS TARG (1.25, 0). ORIENT avoids host bleed trails and spikes. 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 KOINTREAU-4 WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=17 1 715 S POS TARG 1.25, 0.00; S 2C-SUB (2145 S) PATTERN 1 1 Comments: Orbit 1: 3 x 715 s F336W; FLASH=17. ------------------------------------------------------------------------------------------------------------------------------------ 2 KOINTREAU-4 WFC3/UVI ACCUM UVIS2-C51 F775W FLASH=20 1 65 S (195 POS TARG 1.25, 0.00; S 2C-SUB S) PATTERN 1 2 Comments: Orbit 1: 3 x 65 s F775W; FLASH=20. ------------------------------------------------------------------------------------------------------------------------------------ 3 KOINTREAU-4 WFC3/UVI ACCUM UVIS2-C51 F656N FLASH=18 1 844 S POS TARG 1.25, 0.00; S 2C-SUB (2532 S) PATTERN 1 3 Comments: Orbit 2: 3 x 844 s F656N; FLASH=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 | ------------------------------------------------------------------------------------------------------------------------------------ KOINTREAU-4 1 WFC3/UVI ACCUM UVIS2-C5 F336W 1 none none none 1 N/A S 12C-SUB KOINTREAU-4 1 WFC3/UVI ACCUM UVIS2-C5 F336W 2 none none none 1 N/A S 12C-SUB KOINTREAU-4 1 WFC3/UVI ACCUM UVIS2-C5 F336W 3 none none none 1 N/A S 12C-SUB KOINTREAU-4 2 WFC3/UVI ACCUM UVIS2-C5 F775W 1 none none none 1 N/A S 12C-SUB KOINTREAU-4 2 WFC3/UVI ACCUM UVIS2-C5 F775W 2 none none none 1 N/A S 12C-SUB KOINTREAU-4 2 WFC3/UVI ACCUM UVIS2-C5 F775W 3 none none none 1 N/A S 12C-SUB KOINTREAU-4 3 WFC3/UVI ACCUM UVIS2-C5 F656N 1 none none none 2 N/A S 12C-SUB KOINTREAU-4 3 WFC3/UVI ACCUM UVIS2-C5 F656N 2 none none none 2 N/A S 12C-SUB KOINTREAU-4 3 WFC3/UVI ACCUM UVIS2-C5 F656N 3 none none none 2 N/A S 12C-SUB 18436( 5) - 16-Oct-2026 19:52:56 - [ 9] Visit: 04 Visit Requirements: ORIENT 6.9D TO 22.2 D; ORIENT 51.4D TO 112.2 D; ORIENT 141.4D TO 157.7 D; ORIENT 186.9D TO 202.2 D; ORIENT 231.4D TO 292.2 D; ORIENT 321.4D TO 337.7 D On Hold Comments: Additional Comments: YSES 1: two orbits; POS TARG (3.50, 0). ORIENT avoids host bleed trails and spikes. 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 YSES-1 WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=16 1 784 S POS TARG 3.50, 0.00; S 2C-SUB (2352 S) PATTERN 1 1 Comments: Orbit 1: 3 x 784 s F336W; FLASH=16. ------------------------------------------------------------------------------------------------------------------------------------ 2 YSES-1 WFC3/UVI ACCUM UVIS2-C51 F775W FLASH=19 1 25 S (75 POS TARG 3.50, 0.00; S 2C-SUB S) PATTERN 1 2 Comments: Orbit 1: 3 x 25 s F775W; FLASH=19. ------------------------------------------------------------------------------------------------------------------------------------ 3 YSES-1 WFC3/UVI ACCUM UVIS2-C51 F656N FLASH=18 1 698 S POS TARG 3.50, 0.00; S 2C-SUB (2094 S) PATTERN 1 3 Comments: Orbit 2: 3 x 698 s F656N; FLASH=18. ------------------------------------------------------------------------------------------------------------------------------------ 4 YSES-1 WFC3/UVI ACCUM UVIS2-C51 F555W FLASH=16 1 100 S (300 POS TARG 3.50, 0.00; S 2C-SUB S) PATTERN 1 4 Comments: Orbit 2: 3 x 100 s F555W; FLASH=16. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ YSES-1 1 WFC3/UVI ACCUM UVIS2-C5 F336W 1 none none none 1 N/A S 12C-SUB YSES-1 1 WFC3/UVI ACCUM UVIS2-C5 F336W 2 none none none 1 N/A S 12C-SUB YSES-1 1 WFC3/UVI ACCUM UVIS2-C5 F336W 3 none none none 1 N/A S 12C-SUB YSES-1 2 WFC3/UVI ACCUM UVIS2-C5 F775W 1 none none none 1 N/A S 12C-SUB YSES-1 2 WFC3/UVI ACCUM UVIS2-C5 F775W 2 none none none 1 N/A S 12C-SUB YSES-1 2 WFC3/UVI ACCUM UVIS2-C5 F775W 3 none none none 1 N/A S 12C-SUB YSES-1 3 WFC3/UVI ACCUM UVIS2-C5 F656N 1 none none none 2 N/A S 12C-SUB YSES-1 3 WFC3/UVI ACCUM UVIS2-C5 F656N 2 none none none 2 N/A S 12C-SUB YSES-1 3 WFC3/UVI ACCUM UVIS2-C5 F656N 3 none none none 2 N/A S 12C-SUB 18436( 5) - 16-Oct-2026 19:52:56 - [ 10] 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 | ------------------------------------------------------------------------------------------------------------------------------------ YSES-1 4 WFC3/UVI ACCUM UVIS2-C5 F555W 1 none none none 2 N/A S 12C-SUB YSES-1 4 WFC3/UVI ACCUM UVIS2-C5 F555W 2 none none none 2 N/A S 12C-SUB YSES-1 4 WFC3/UVI ACCUM UVIS2-C5 F555W 3 none none none 2 N/A S 12C-SUB 18436( 5) - 16-Oct-2026 19:52:56 - [ 11] Visit: 05 Visit Requirements: ORIENT 11.1D TO 36.5 D; ORIENT 56.6D TO 80.9 D; ORIENT 101.1D TO 170.9 D; ORIENT 191.1D TO 216.5 D; ORIENT 236.6D TO 260.9 D; ORIENT 281.1D TO 350.9 D On Hold Comments: Additional Comments: ROXs 42B: two orbits; POS TARG (1.25, 0). ORIENT avoids host bleed trails and spikes. 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 ROXS-42B WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=17 1 725 S POS TARG 1.25, 0.00; S 2C-SUB (2175 S) PATTERN 1 1 Comments: Orbit 1: 3 x 725 s F336W; FLASH=17. ------------------------------------------------------------------------------------------------------------------------------------ 2 ROXS-42B WFC3/UVI ACCUM UVIS2-C51 F775W FLASH=19 1 55 S (165 POS TARG 1.25, 0.00; S 2C-SUB S) PATTERN 1 2 Comments: Orbit 1: 3 x 55 s F775W; FLASH=19. ------------------------------------------------------------------------------------------------------------------------------------ 3 ROXS-42B WFC3/UVI ACCUM UVIS2-C51 F656N FLASH=18 1 843 S POS TARG 1.25, 0.00; S 2C-SUB (2529 S) PATTERN 1 3 Comments: Orbit 2: 3 x 843 s F656N; FLASH=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 | ------------------------------------------------------------------------------------------------------------------------------------ ROXS-42B 1 WFC3/UVI ACCUM UVIS2-C5 F336W 1 none none none 1 N/A S 12C-SUB ROXS-42B 1 WFC3/UVI ACCUM UVIS2-C5 F336W 2 none none none 1 N/A S 12C-SUB ROXS-42B 1 WFC3/UVI ACCUM UVIS2-C5 F336W 3 none none none 1 N/A S 12C-SUB ROXS-42B 2 WFC3/UVI ACCUM UVIS2-C5 F775W 1 none none none 1 N/A S 12C-SUB ROXS-42B 2 WFC3/UVI ACCUM UVIS2-C5 F775W 2 none none none 1 N/A S 12C-SUB ROXS-42B 2 WFC3/UVI ACCUM UVIS2-C5 F775W 3 none none none 1 N/A S 12C-SUB ROXS-42B 3 WFC3/UVI ACCUM UVIS2-C5 F656N 1 none none none 2 N/A S 12C-SUB ROXS-42B 3 WFC3/UVI ACCUM UVIS2-C5 F656N 2 none none none 2 N/A S 12C-SUB ROXS-42B 3 WFC3/UVI ACCUM UVIS2-C5 F656N 3 none none none 2 N/A S 12C-SUB 18436( 5) - 16-Oct-2026 19:52:56 - [ 12] Visit: 06 Visit Requirements: ORIENT 11.1D TO 36.5 D; ORIENT 56.6D TO 80.9 D; ORIENT 101.1D TO 170.9 D; ORIENT 191.1D TO 216.5 D; ORIENT 236.6D TO 260.9 D; ORIENT 281.1D TO 350.9 D On Hold Comments: Additional Comments: ROXs 42B: two orbits; POS TARG (1.25, 0). ORIENT avoids host bleed trails and spikes. 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 ROXS-42B WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=17 1 725 S POS TARG 1.25, 0.00; S 2C-SUB (2175 S) PATTERN 1 1 Comments: Orbit 1: 3 x 725 s F336W; FLASH=17. ------------------------------------------------------------------------------------------------------------------------------------ 2 ROXS-42B WFC3/UVI ACCUM UVIS2-C51 F775W FLASH=19 1 55 S (165 POS TARG 1.25, 0.00; S 2C-SUB S) PATTERN 1 2 Comments: Orbit 1: 3 x 55 s F775W; FLASH=19. ------------------------------------------------------------------------------------------------------------------------------------ 3 ROXS-42B WFC3/UVI ACCUM UVIS2-C51 F656N FLASH=18 1 843 S POS TARG 1.25, 0.00; S 2C-SUB (2529 S) PATTERN 1 3 Comments: Orbit 2: 3 x 843 s F656N; FLASH=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 | ------------------------------------------------------------------------------------------------------------------------------------ ROXS-42B 1 WFC3/UVI ACCUM UVIS2-C5 F336W 1 none none none 1 N/A S 12C-SUB ROXS-42B 1 WFC3/UVI ACCUM UVIS2-C5 F336W 2 none none none 1 N/A S 12C-SUB ROXS-42B 1 WFC3/UVI ACCUM UVIS2-C5 F336W 3 none none none 1 N/A S 12C-SUB ROXS-42B 2 WFC3/UVI ACCUM UVIS2-C5 F775W 1 none none none 1 N/A S 12C-SUB ROXS-42B 2 WFC3/UVI ACCUM UVIS2-C5 F775W 2 none none none 1 N/A S 12C-SUB ROXS-42B 2 WFC3/UVI ACCUM UVIS2-C5 F775W 3 none none none 1 N/A S 12C-SUB ROXS-42B 3 WFC3/UVI ACCUM UVIS2-C5 F656N 1 none none none 2 N/A S 12C-SUB ROXS-42B 3 WFC3/UVI ACCUM UVIS2-C5 F656N 2 none none none 2 N/A S 12C-SUB ROXS-42B 3 WFC3/UVI ACCUM UVIS2-C5 F656N 3 none none none 2 N/A S 12C-SUB 18436( 5) - 16-Oct-2026 19:52:56 - [ 13] Summary Form for Proposal 18436 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2-C512C-SUB ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=16, FLASH=17, FLASH=18, FLASH=19, FLASH=20 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 101.1D TO 170.9 D, ORIENT 11.1D TO 36.5 D, ORIENT 132.7D TO 202.5 D, ORIENT 141.4D TO 157.7 D, ORIENT 164.2D TO 174.6 D, ORIENT 186.9D TO 202.2 D, ORIENT 191.1D TO 216.5 D, ORIENT 222.7D TO 248.1 D, ORIENT 231.4D TO 292.2 D, ORIENT 236.6D TO 260.9 D, ORIENT 268.2D TO 292.5 D, ORIENT 281.1D TO 350.9 D, ORIENT 312.7D TO 22.5 D, ORIENT 321.4D TO 337.7 D, ORIENT 42.7D TO 68.1 D, ORIENT 51.4D TO 112.2 D, ORIENT 56.6D TO 80.9 D, ORIENT 6.9D TO 22.2 D, ORIENT 88.2D TO 112.5 D, PATTERN 1 1, PATTERN 1 2, PATTERN 1 3, PATTERN 1 4, POS TARG 0.50, 0.00, POS TARG 1.25, 0.00, POS TARG 3.50, 0.00, VISIBILITY INTERVAL 48 M ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F336W, F555W, F656N, F775W, F850LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names KOINTREAU-1, KOINTREAU-4, ROXS-42B, YSES-1 ------------------------------------------------------------------------------------------------------------------------------------