17354( 10) - 22-Jul-2025 13:59:23 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17354 Version: 10 Check-in Time: 22-Jul-2025 13:59:23 STScI Edit Number: 5 Title WFC3 UVIS CTE Monitor (Star Cluster) ------------------------------------------------------------------------------------ Type Cycle CAL/WFC3 31 ------------------------------------------------------------------------------------ Investigators Contact? PI: Benjamin Kuhn Space Telescope Science Institute Y CoI: Varun Bajaj Space Telescope Science Institute Y CoI: Dr. Sylvia M. Baggett Space Telescope Science Institute Y CoI: Dr. Jay Anderson Space Telescope Science Institute Y ------------------------------------------------------------------------------------ Abstract This program is a recurring UVIS calibration monitor that will observe two stellar clusters (Omega Centauri, and 47 Tuc) to measure the flux loss of point sources as a function of detector row number due to degrading Charge Transfer Efficiency (CTE). Because CTE fluctuates with characteristics such as source flux and background level, this program is designed to take short and long exposures, at various commanded post-flash levels with the F502N filter. We will compare the results from these new observations with previous external CTE calibration programs and update the aperture phometry-based CTE model. Furthermore, ACS has an external CTE calibration program that observes NGC 104 at various post-flash levels that can also be used for direct comparison. Lastly, these data will be used to help monitor/improve the empirical pixel-based CTE correction (FLC/DRC). ------------------------------------------------------------------------------------ Observations Description ------------------------ Using clusters to measure the UVIS CTE relies on image pairs that have a ~2000 pixel (~ 1 chip height) dither. Each field is first observed in UVIS2, and then dithered in the y-direction by an 81.6-arcsecond step (UVIS pixel scale ~ 0.04 arcsec/pixel), and then an identical exposure of the same field is taken in UVIS1. This allows a source that is near an amplifier in one chip (exposure) to be further from an amplifier in the other chip (exposure) enabling an absolute measure of the CTE. With varying field density, post flash, and exposure length, we build and maintain a CTE model based on many parameters. In the past, the external CTE monitor has observed globular cluster NGC 104 (47 Tuc), and open cluster NGC 6791. The sparseness of NGC 6791 compared to 47 Tuc was used to test the effects of self-shielding on CTE-induced flux losses. However, the CTE trending between the two targets has not shown a significant difference. Therefore, starting cycle 28 we have swapped out NGC 6791 for Omega Centauri. Switching to Omega Centauri provides significantly more stars, particularly at the faint end, which improves the CTE measurements. Each cluster will have long and short exposures taken. NGC 104 17354( 10) - 22-Jul-2025 13:59:23 - [ 2] short exposures will have 12 e-/pixel post-flash (~12 e- total background) and Omega Centauri will have 0 and 11 e-/pixel post-flash (~1 and 12 e- total background). The long exposure Omega Centauri images will be taken with a 10, 15, 23, 44, 75 and, 98 e-/pixel post-flash (20, 25, 34, 56, 92, and 117 e- total background). NGC 104 long exposures will use post-flash levels: 0, 18, 24, 33, 55, 91, and 116 e-/pixel. (1, 20, 25, 34, 56, 92, 117 e- total background). All observations use the F502N. Because of the ~2000 pixel dither, any warnings about the target being outside of the aperture can be ignored. Any warnings regarding post-flash may also be ignored since we're trying to simulate background levels with low/high commanded post-flashes. ------- Scheduling ------- The CTE long-term monitoring observations are taken at two epochs each cycle, starting approximately six months after the previous cycle's epoch. Starting in cycle 30, we have removed the timing requirements for visits 02 and 04. Previously we grouped Visit02 with Visit01 within x-number of days and the same thing for Visit04 with Visit03. Rather than apply a group-within timing link, we set unique betweens for each visit to help ensure the monitor obtains observations roughly ~6 months between epoch 1 (visits 01 & 02) and epoch 2 (visit 02 & 03), and to hopefully help get the observations on the official schedule easier. ------ Calibration Justification ------- These data will be used to determine the evolution of CTE with epoch, position on the detector, and flash-level (i.e. background). Varying the background levels via post-flash will allow us to monitor the effects of post-flash to mitigate CTE. Results will be compared to Cycles 17-30 CTE measurements for WFC3/UVIS CCDs. The analysis of the data will be used to continue calibrating a model of CTE-induced losses in both FLT and DRZ UVIS images, with a precision of better than 1% for stellar photometry and less than 5% for astrometric effects from CTE-induced source centroid shifts. Additionally, all exposures taken in this program will also be used to test and improve the pixel-basedUVIS CTE correction algorithm developed by J. Anderson. ------------------------------------------------------------------------------------ 17354( 10) - 22-Jul-2025 13:59:23 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 OMEGACEN STELLAR CLUSTER, RA=13H26M46.2800S +/- 0.1", J2000 V = 16.8 GLOBULAR CLUSTER DEC=-47D28'44.60" +/- 0.1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-104 STELLAR CLUSTER, RA=00H22M38.2500S +/- 0.1", J2000 V = 4.91 GLOBULAR CLUSTER DEC=-72D03'54.00" +/- 0.1" Reference Frame: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015.5 0.0015731412087106966 -0.001250000013897079 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 17354( 10) - 22-Jul-2025 13:59:23 - [ 4] Visit: 01 (Visit 01 - OMEGACEN (12 exposures)) Visit Requirements: SCHED 70%; BETWEEN 14-JUN-2024:00:00:00 AND 02-AUG-2024:00:00:00 On Hold Comments: Additional Comments: USE SAME GUIDE STAR THROUGHOUT VISIT. USE SAME ORIENTATION THROUGHOUT VISIT. 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 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO 1 30 S (30 GS ACQ SCENARIO BASE1O3 S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=10 1 348 S (348 S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=15 1 348 S (348 S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=23 1 348 S (348 S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 S FLASHEXP=17.24 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=11 1 30 S (30 S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO 1 30 S (30 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 8 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=10 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 9 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=15 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 10 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=23 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 11 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 81.6 S FLASHEXP=17.24 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=11 1 30 S (30 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 17354( 10) - 22-Jul-2025 13:59:23 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ OMEGACEN 1 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 2 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 3 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 4 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 5 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 6 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 7 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 8 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 9 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 10 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 11 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 12 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S 17354( 10) - 22-Jul-2025 13:59:23 - [ 6] Visit: 02 (Visit 02 - NGC 104 (12 exposures)) Visit Requirements: SCHED 70%; BETWEEN 26-AUG-2024:00:00:00 AND 28-OCT-2024:00:00:00 On Hold Comments: Additional Comments: USE SAME GUIDE STAR THROUGHOUT VISIT. USE SAME ORIENTATION THROUGHOUT VISIT. 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 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=12. 1 30 S (30 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO 1 348 S (348 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=18 1 348 S (348 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=24 1 348 S (348 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 0 S FLASHEXP=13. S) ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 0 S FLASHEXP=21.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=18 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=24 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 81.6 S FLASHEXP=13. S) ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 81.6 S FLASHEXP=21.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=12. 1 30 S (30 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 17354( 10) - 22-Jul-2025 13:59:23 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-104 1 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 2 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 3 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 4 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 5 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 6 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 7 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 8 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 9 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 10 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 11 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 12 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S 17354( 10) - 22-Jul-2025 13:59:23 - [ 8] Visit: 03 (Visit 03 - OMEGACEN (12 exposures)) Visit Requirements: SCHED 70%; BETWEEN 27-DEC-2024:00:00:00 AND 10-JAN-2025:00:00:00 On Hold Comments: Additional Comments: USE SAME GUIDE STAR THROUGHOUT VISIT. USE SAME ORIENTATION THROUGHOUT VISIT. 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 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO 1 30 S (30 S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=10 1 348 S (348 S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=15 1 348 S (348 S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=23 1 348 S (348 S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 S FLASHEXP=17.24 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=11 1 30 S (30 S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO 1 30 S (30 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 8 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=10 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 9 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=15 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 10 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=23 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 11 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 81.6 S FLASHEXP=17.24 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=11 1 30 S (30 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 17354( 10) - 22-Jul-2025 13:59:23 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ OMEGACEN 1 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 2 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 3 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 4 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 5 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 6 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 7 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 8 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 9 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 10 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 11 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 12 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S 17354( 10) - 22-Jul-2025 13:59:23 - [ 10] Visit: 04 (Visit 04 - NGC 104 (12 exposures)) Visit Requirements: SCHED 70%; BETWEEN 08-JUL-2025:00:00:00 AND 25-JUL-2025:00:00:00 On Hold Comments: Additional Comments: USE SAME GUIDE STAR THROUGHOUT VISIT. USE SAME ORIENTATION THROUGHOUT VISIT. 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 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=12. 1 30 S (30 GS ACQ SCENARIO BASE1O3 S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO 1 348 S (348 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=18 1 348 S (348 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=24 1 348 S (348 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 0 S FLASHEXP=13. S) ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 0 S FLASHEXP=21.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=18 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=24 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 81.6 S FLASHEXP=13. S) ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 81.6 S FLASHEXP=21.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=12. 1 30 S (30 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 17354( 10) - 22-Jul-2025 13:59:23 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-104 1 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 2 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 3 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 4 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 5 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 6 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 7 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 8 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 9 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 10 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 11 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 12 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S 17354( 10) - 22-Jul-2025 13:59:23 - [ 12] Visit: 51 (Visit 51 - OMEGACEN (12 exposures)) Visit Requirements: SCHED 70%; BETWEEN 29-AUG-2024:00:00:00 AND 10-SEP-2024:00:00:00 On Hold Comments: Additional Comments: USE SAME GUIDE STAR THROUGHOUT VISIT. USE SAME ORIENTATION THROUGHOUT VISIT. 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 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO 1 30 S (30 GS ACQ SCENARIO BASE1O3 S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=10 1 348 S (348 S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=15 1 348 S (348 S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=23 1 348 S (348 S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 S FLASHEXP=17.24 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=11 1 30 S (30 S S) ------------------------------------------------------------------------------------------------------------------------------------ 7 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO 1 30 S (30 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 8 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=10 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 9 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=15 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 10 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=23 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 11 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 81.6 S FLASHEXP=17.24 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 OMEGACEN WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=11 1 30 S (30 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 17354( 10) - 22-Jul-2025 13:59:23 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ OMEGACEN 1 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 2 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 3 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 4 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 5 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 6 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S OMEGACEN 7 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 8 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 9 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 10 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 11 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S OMEGACEN 12 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S 17354( 10) - 22-Jul-2025 13:59:23 - [ 14] Visit: 54 (Visit 54 - NGC 104 (12 exposures)) Visit Requirements: SCHED 70%; BETWEEN 08-JUL-2025:00:00:00 AND 11-SEP-2025:00:00:00 On Hold Comments: Additional Comments: USE SAME GUIDE STAR THROUGHOUT VISIT. USE SAME ORIENTATION THROUGHOUT VISIT. 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 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=12. 1 30 S (30 GS ACQ SCENARIO BASE1O3 S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO 1 348 S (348 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=18 1 348 S (348 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=24 1 348 S (348 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 0 S FLASHEXP=13. S) ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 0 S FLASHEXP=21.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=18 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=24 1 348 S (348 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 81.6 S FLASHEXP=13. S) ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASHCUR=LOW, 1 348 S (348 POS TARG 0, 81.6 S FLASHEXP=21.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 NGC-104 WFC3/UVI ACCUM UVIS F502N CR-SPLIT=NO, FLASH=12. 1 30 S (30 POS TARG 0, 81.6 S S) ------------------------------------------------------------------------------------------------------------------------------------ 17354( 10) - 22-Jul-2025 13:59:23 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-104 1 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 2 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 3 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 4 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 5 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 6 WFC3/UVI ACCUM UVIS F502N none none none none 1 N/A S NGC-104 7 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 8 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 9 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 10 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 11 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S NGC-104 12 WFC3/UVI ACCUM UVIS F502N none none none none 2 N/A S 17354( 10) - 22-Jul-2025 13:59:23 - [ 16] Summary Form for Proposal 17354 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO, FLASH=10, FLASH=11, FLASH=12., FLASH=15, FLASH=18, FLASH=23, FLASH=24, FLASHCUR=LOW, FLASHEXP=13., FLASHEXP=17.24, FLASHEXP=21.5 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 08-JUL-2025:00:00:00 AND 11-SEP-2025:00:00:00, BETWEEN 08-JUL-2025:00:00:00 AND 25-JUL-2025:00:00:00, BETWEEN 14-JUN-2024:00:00:00 AND 02-AUG-2024:00:00:00, BETWEEN 26-AUG-2024:00:00:00 AND 28-OCT-2024:00:00:00, BETWEEN 27-DEC-2024:00:00:00 AND 10-JAN-2025:00:00:00, BETWEEN 29-AUG-2024:00:00:00 AND 10-SEP-2024:00:00:00, GS ACQ SCENARIO BASE1O3, POS TARG 0, 0, POS TARG 0, 81.6, SCHED 70% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F502N ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC-104, OMEGACEN ------------------------------------------------------------------------------------------------------------------------------------