17893( 4) - 24-Feb-2025 19:38:57 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17893 Version: 4 Check-in Time: 24-Feb-2025 19:38:57 STScI Edit Number: 1 Title Impact of Single Star Guiding on HST Pointing Stabaility with WFC3/UVIS ------------------------------------------------------------------------------------ Type Cycle CAL/WFC3 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Jay Anderson Space Telescope Science Institute Y CoI: Varun Bajaj Space Telescope Science Institute Y CoI: Ms. Jennifer Mack Space Telescope Science Institute Y CoI: Dr. Sylvia M. Baggett Space Telescope Science Institute Y CoI: Isabel Rivera Space Telescope Science Institute Y ------------------------------------------------------------------------------------ Abstract Reduced Gyro Mode (RGM) imposes significant orientation limitations on observations. Not only do observers have less freedom in choosing the orientation for their exposures, but sometimes there are no allowable orientations that have two guide stars. When there is a primary GS but no secondary GS, the telescope boresight can be held steady, but the telescope must rely on the gyro to hold the orient steady. Orient drift about the guide star in the FGS translates to pointing drift for the prime instrument. We have analyzed the pointing stability of available archival 1GS observations pre/post RGM, and we find no perceptible impact to image quality. As a result of this finding, all SNAPs have been converted to single-GS guiding. However, since SNAPs are typically <500s, it is hard to assess the impact of one-star guiding on longer exposures and visits. This proposed program will provide PIs with critical information to make better informed Phase-2 decisions regarding exposure length. To measure the stability of the pointing on single star guiding, we will observe a rich stellar field near IC 1848 (Soul Nebula) with WFC3/UVIS. We will obtain multiple undithered exposures (as any change in the pointing will thus be guiding error) in a single filter, and repeat the observations five times to validate the result. Additionally, we will obtain two ACS/WFC images in parallel at the end of each orbit to investigate the effects of single star guiding on the parallel instruments. Additionally, these observations will aid in constraining the focus of the observatory by allowing a much larger number of stars to be measured on more regions of the detectors, especially the corners in amplifiers A and D, where the focus variations are strongest. ------------------------------------------------------------------------------------ Observations Description ------------------------ We observe a field offset south from the center of IC 1848 with WFC3/UVIS F410M. We avoid the center of the cluster due to the presence of two extremely bright (B~=7 mag) stars. Each of the five visits are identical. Each visit is to be separated by between 1 and 3 days to sample the behavior of the pointing control system. 17893( 4) - 24-Feb-2025 19:38:57 - [ 2] Each visit visit has the following structure of exposures - 35s UVIS F410M - 350s UVIS F410M - 350s UVIS F410M - 350s UVIS F410M - 350s UVIS F410M + ACS/WFC F606W in parallel - 350s UVIS F410M + ACS/WFC F606W in parallel This strategy allows for the collection of the most images in a visit, while ensuring adequate SNR on many stars in the field. The orient ranges are set to attempt to prevent bright figure 8 ghosts from affecting the data. In these observations, no dithers are used, as we are attempting to measure the stability of the pointing control system, and dithers may introduce confounding errors. **NOTE**: All observations must use the same guide star, and use just a single FGS (FGS1 is ideal) for guiding ------------------------------------------------------------------------------------ 17893( 4) - 24-Feb-2025 19:38:57 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 IC1848-OFFSE STELLAR CLUSTER, OPEN RA=02H51M9.2000S, J2000 V = 6.5 T CLUSTER DEC=+60D20'14.45" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 17893( 4) - 24-Feb-2025 19:38:57 - [ 4] Visit: 01 Visit Requirements: ORIENT 53D TO 75 D; BEFORE 01-JAN-2026:00:00:00 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 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 35 S (35 SEQ 1-8 NON-INT ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 PAR 7-8 WITH 5-6 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 6 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 ANY ACS/WFC ACCUM WFC F606W 1 350 S (350 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY ACS/WFC ACCUM WFC F606W 1 350 S (350 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 | ------------------------------------------------------------------------------------------------------------------------------------ IC1848-OFFSET 1 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 2 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 3 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 4 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 5 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 6 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S 17893( 4) - 24-Feb-2025 19:38:57 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ANY 7 ACS/WFC ACCUM WFC F606W none none none none 1 N/A ANY 8 ACS/WFC ACCUM WFC F606W none none none none 1 N/A 17893( 4) - 24-Feb-2025 19:38:57 - [ 6] Visit: 02 Visit Requirements: ORIENT 53D TO 75 D; AFTER 01 BY 1 D TO 3 D; BEFORE 01-JAN-2026:00:00:00 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 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 35 S (35 SEQ 1-8 NON-INT ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 PAR 7-8 WITH 5-6 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 6 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 ANY ACS/WFC ACCUM WFC F606W 1 350 S (350 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY ACS/WFC ACCUM WFC F606W 1 350 S (350 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 | ------------------------------------------------------------------------------------------------------------------------------------ IC1848-OFFSET 1 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 2 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 3 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 4 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 5 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 6 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S 17893( 4) - 24-Feb-2025 19:38:57 - [ 7] 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 | ------------------------------------------------------------------------------------------------------------------------------------ ANY 7 ACS/WFC ACCUM WFC F606W none none none none 1 N/A ANY 8 ACS/WFC ACCUM WFC F606W none none none none 1 N/A 17893( 4) - 24-Feb-2025 19:38:57 - [ 8] Visit: 03 Visit Requirements: ORIENT 53D TO 75 D; AFTER 02 BY 1 D TO 3 D; BEFORE 01-JAN-2026:00:00:00 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 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 35 S (35 SEQ 1-8 NON-INT ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 PAR 7-8 WITH 5-6 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 6 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 ANY ACS/WFC ACCUM WFC F606W 1 350 S (350 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY ACS/WFC ACCUM WFC F606W 1 350 S (350 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 | ------------------------------------------------------------------------------------------------------------------------------------ IC1848-OFFSET 1 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 2 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 3 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 4 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 5 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 6 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S 17893( 4) - 24-Feb-2025 19:38:57 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ANY 7 ACS/WFC ACCUM WFC F606W none none none none 1 N/A ANY 8 ACS/WFC ACCUM WFC F606W none none none none 1 N/A 17893( 4) - 24-Feb-2025 19:38:57 - [ 10] Visit: 04 Visit Requirements: ORIENT 53D TO 75 D; AFTER 03 BY 1 D TO 3 D; BEFORE 01-JAN-2026:00:00:00 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 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 35 S (35 SEQ 1-8 NON-INT ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 PAR 7-8 WITH 5-6 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 6 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 ANY ACS/WFC ACCUM WFC F606W 1 350 S (350 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY ACS/WFC ACCUM WFC F606W 1 350 S (350 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 | ------------------------------------------------------------------------------------------------------------------------------------ IC1848-OFFSET 1 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 2 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 3 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 4 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 5 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 6 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S 17893( 4) - 24-Feb-2025 19:38:57 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ANY 7 ACS/WFC ACCUM WFC F606W none none none none 1 N/A ANY 8 ACS/WFC ACCUM WFC F606W none none none none 1 N/A 17893( 4) - 24-Feb-2025 19:38:57 - [ 12] Visit: 05 Visit Requirements: ORIENT 53D TO 75 D; AFTER 04 BY 1 D TO 3 D; BEFORE 01-JAN-2026:00:00:00 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 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 35 S (35 SEQ 1-8 NON-INT ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 PAR 7-8 WITH 5-6 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 6 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 ANY ACS/WFC ACCUM WFC F606W 1 350 S (350 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY ACS/WFC ACCUM WFC F606W 1 350 S (350 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 | ------------------------------------------------------------------------------------------------------------------------------------ IC1848-OFFSET 1 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 2 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 3 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 4 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 5 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 6 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S 17893( 4) - 24-Feb-2025 19:38:57 - [ 13] 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 | ------------------------------------------------------------------------------------------------------------------------------------ ANY 7 ACS/WFC ACCUM WFC F606W none none none none 1 N/A ANY 8 ACS/WFC ACCUM WFC F606W none none none none 1 N/A 17893( 4) - 24-Feb-2025 19:38:57 - [ 14] Visit: 51 (repeat of failed visit 1) Visit Requirements: BEFORE 31-MAY-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 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 35 S (35 SEQ 1-8 NON-INT ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 PAR 7-8 WITH 5-6 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 6 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 ANY ACS/WFC ACCUM WFC F606W 1 350 S (350 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY ACS/WFC ACCUM WFC F606W 1 350 S (350 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 | ------------------------------------------------------------------------------------------------------------------------------------ IC1848-OFFSET 1 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 2 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 3 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 4 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 5 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 6 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S 17893( 4) - 24-Feb-2025 19:38:57 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ANY 7 ACS/WFC ACCUM WFC F606W none none none none 1 N/A ANY 8 ACS/WFC ACCUM WFC F606W none none none none 1 N/A 17893( 4) - 24-Feb-2025 19:38:57 - [ 16] Visit: 52 (repeat of failed visit 2) Visit Requirements: BEFORE 31-MAY-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 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 35 S (35 SEQ 1-8 NON-INT ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 PAR 7-8 WITH 5-6 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 6 IC1848-OFFS WFC3/UVI ACCUM UVIS F410M FLASH=21 1 350 S (350 ET S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 ANY ACS/WFC ACCUM WFC F606W 1 350 S (350 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY ACS/WFC ACCUM WFC F606W 1 350 S (350 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 | ------------------------------------------------------------------------------------------------------------------------------------ IC1848-OFFSET 1 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 2 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 3 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 4 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 5 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S IC1848-OFFSET 6 WFC3/UVI ACCUM UVIS F410M none none none none 1 N/A S 17893( 4) - 24-Feb-2025 19:38:57 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ANY 7 ACS/WFC ACCUM WFC F606W none none none none 1 N/A ANY 8 ACS/WFC ACCUM WFC F606W none none none none 1 N/A 17893( 4) - 24-Feb-2025 19:38:57 - [ 18] Summary Form for Proposal 17893 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS, WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=21 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 1 D TO 3 D, AFTER 02 BY 1 D TO 3 D, AFTER 03 BY 1 D TO 3 D, AFTER 04 BY 1 D TO 3 D, BEFORE 01-JAN-2026:00:00:00, BEFORE 31-MAY-2025:00:00:00, ORIENT 53D TO 75 D, PAR 7-8 WITH 5-6, SEQ 1-8 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F410M, F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names ANY, IC1848-OFFSET ------------------------------------------------------------------------------------------------------------------------------------