18331( 4) - 09-Sep-2026 12:40:03 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 18331 Version: 4 Check-in Time: 09-Sep-2026 12:40:03 STScI Edit Number: 0 Title Stars Born in the Wind: Where and How Are Stars Formed in the M82 Outflow? ------------------------------------------------------------------------------------ Type Cycle GO 34 ------------------------------------------------------------------------------------ Investigators Contact? PI: Yucheng Guo Arizona State University Y CoI: Timothy M. Heckman The Johns Hopkins University N CoI: Prof. Adam Smercina Tufts University N CoI: Dr. Sanchayeeta Borthakur Arizona State University N CoI: Mr. Vaishnav Rao University of Michigan N ------------------------------------------------------------------------------------ Abstract Galactic outflows are a fundamental component of galaxy evolution, yet it remains unclear whether they act only as negative feedback or can also trigger star formation by compressing gas. This positive-feedback mode has been suggested by theory and by indirect nebular diagnostics, but it has never been established through direct detection and age-dating of the young stars themselves. With its proximity and prototypical bipolar superwind, M82 is the only system where this can be tested star by star. Recent HST optical-band imaging has revealed halo stellar populations plausibly linked to the starburst history of the disk, and our analysis of archival HST UV data uncovers candidate OB stars closely associated with filamentary outflow structures. These results strongly motivate deeper multi-band UV-optical imaging to securely identify young massive stars and break the age-extinction degeneracy. We therefore propose deep HST imaging of three regions in the M82 superwind, spanning 2-11 kpc from the disk, to carry out the first spatially resolved census of young massive stars born across the outflow. By combining new observations with archival data, we will directly detect and age-date the young stars in the outflows, quantify their contribution to the recent star formation in M82, and determine whether they formed within the outflow itself or instead at wind-CGM interaction sites. This programme will provide the clearest direct test yet of star formation in galactic outflows and constrain its implications for feedback physics. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will obtain WFC3/UVIS imaging of three fields in the M82 outflow to identify and age-date young massive stars potentially formed in the wind. The primary observations use F275W and F336W, combined with at least one optical band in each field, to isolate hot upper-main-sequence stars and constrain their ages and extinction. Fields 1 and 2 already have archival optical imaging, so only new UV imaging is required there. Field 3 lacks the needed optical coverage, so we also obtain F475W and F814W imaging. The program uses 24 orbits in total, organized into 10 visits. Field 1 is observed in two visits: one 3-orbit visit in F275W and one 1-orbit visit in F336W. Field 2 is observed in two visits: one 3-orbit visit in F275W and one 2-orbit visit in F336W. Field 3 is observed in six visits: one 3-orbit visit in 18331( 4) - 09-Sep-2026 12:40:03 - [ 2] F275W, one 2-orbit visit in F336W, one 2-orbit visit in F475W, one 2-orbit visit in F814W, and two 3-orbit visits in F656N. We use a WFC3/UVIS two or three point dither pattern to improve sampling, reject cosmic rays, and cover detector artifacts. The UV and narrow-band exposures use post-flash as needed for CTE performance. Visits within each field are constrained to the same orientation so that all filters cover the same sky area and can be combined into matched photometric catalogs. ------------------------------------------------------------------------------------ 18331( 4) - 09-Sep-2026 12:40:03 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 M82-FIELD1 GALAXY, STARBURST, WIND RA=09H55M57.5000S +/- 1", J2000 V = 16 +/- 2 DEC=+69D39'23.00" +/- 1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 M82-FIELD2 GALAXY, STARBURST, WIND RA=09H56M19.0000S +/- 1", J2000 V = 16 +/- 2 DEC=+69D36'42.00" +/- 1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 M82-FIELD3 GALAXY, STARBURST, WIND RA=09H55M6.5000S +/- 1", J2000 V = 16 +/- 2 DEC=+69D50'47.00" +/- 1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 18331( 4) - 09-Sep-2026 12:40:03 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE-3PT Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 2.98 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type LINE LINE Pattern_Purpose DITHER DITHER Number_Of_Points 3 3 Point_Spacing 2.98 0.2 Line_Spacing Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 46.84 45 Angle_Between_Sides Center_Pattern NO YES ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 Primary_Pattern Secondary_Pattern Pattern_Type LINE LINE Pattern_Purpose DITHER DITHER Number_Of_Points 3 2 Point_Spacing 2.98 0.2 Line_Spacing Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 46.84 45 Angle_Between_Sides Center_Pattern NO YES ------------------------------------------------------------------------------------------------------------------------------------ 18331( 4) - 09-Sep-2026 12:40:03 - [ 5] Visit: 01 (Field1-F275W) Visit Requirements: 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 M82-FIELD1 WFC3/UVI ACCUM UVIS-CENT F275W FLASH=17 1 900 S PATTERN 2 1 S ER see below (7398 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 | ------------------------------------------------------------------------------------------------------------------------------------ M82-FIELD1 1 WFC3/UVI ACCUM UVIS-CEN F275W 1 1 none none 1 822.0 S S TER M82-FIELD1 1 WFC3/UVI ACCUM UVIS-CEN F275W 1 2 none none 1 822.0 S S TER M82-FIELD1 1 WFC3/UVI ACCUM UVIS-CEN F275W 1 3 none none 1 822.0 S S TER M82-FIELD1 1 WFC3/UVI ACCUM UVIS-CEN F275W 2 1 none none 2 822.0 S S TER M82-FIELD1 1 WFC3/UVI ACCUM UVIS-CEN F275W 2 2 none none 2 822.0 S S TER M82-FIELD1 1 WFC3/UVI ACCUM UVIS-CEN F275W 2 3 none none 2 822.0 S S TER M82-FIELD1 1 WFC3/UVI ACCUM UVIS-CEN F275W 3 1 none none 3 822.0 S S TER M82-FIELD1 1 WFC3/UVI ACCUM UVIS-CEN F275W 3 2 none none 3 822.0 S S TER M82-FIELD1 1 WFC3/UVI ACCUM UVIS-CEN F275W 3 3 none none 3 822.0 S S TER 18331( 4) - 09-Sep-2026 12:40:03 - [ 6] Visit: 02 (Field1-F336W) Visit Requirements: SAME ORIENT AS 01 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 M82-FIELD1 WFC3/UVI ACCUM UVIS-CENT F336W FLASH=17 1 825 S PATTERN 1 1 S ER (2475 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 | ------------------------------------------------------------------------------------------------------------------------------------ M82-FIELD1 1 WFC3/UVI ACCUM UVIS-CEN F336W 1 none none none 1 N/A S TER M82-FIELD1 1 WFC3/UVI ACCUM UVIS-CEN F336W 2 none none none 1 N/A S TER M82-FIELD1 1 WFC3/UVI ACCUM UVIS-CEN F336W 3 none none none 1 N/A S TER 18331( 4) - 09-Sep-2026 12:40:03 - [ 7] Visit: 03 (Field2-F275W) Visit Requirements: 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 M82-FIELD2 WFC3/UVI ACCUM UVIS-CENT F275W FLASH=17 1 835 S PATTERN 2 1 S ER see below (7398 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 | ------------------------------------------------------------------------------------------------------------------------------------ M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F275W 1 1 none none 1 822 S S TER M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F275W 1 2 none none 1 822 S S TER M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F275W 1 3 none none 1 822 S S TER M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F275W 2 1 none none 2 822 S S TER M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F275W 2 2 none none 2 822 S S TER M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F275W 2 3 none none 2 822 S S TER M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F275W 3 1 none none 3 822 S S TER M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F275W 3 2 none none 3 822 S S TER M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F275W 3 3 none none 3 822 S S TER 18331( 4) - 09-Sep-2026 12:40:03 - [ 8] Visit: 04 (Field2-F336W) Visit Requirements: SAME ORIENT AS 03 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 M82-FIELD2 WFC3/UVI ACCUM UVIS-CENT F336W FLASH=17 1 835 S PATTERN 3 1 S ER see below (4932 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 | ------------------------------------------------------------------------------------------------------------------------------------ M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F336W 1 1 none none 1 822.0 S S TER M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F336W 1 2 none none 1 822.0 S S TER M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F336W 2 1 none none 1 822.0 S S TER M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F336W 2 2 none none 2 822.0 S S TER M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F336W 3 1 none none 2 822.0 S S TER M82-FIELD2 1 WFC3/UVI ACCUM UVIS-CEN F336W 3 2 none none 2 822.0 S S TER 18331( 4) - 09-Sep-2026 12:40:03 - [ 9] Visit: 05 (Field3-F275W) Visit Requirements: 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 M82-FIELD3 WFC3/UVI ACCUM UVIS-CENT F275W FLASH=17 1 827 S PATTERN 2 1 S ER see below (7398 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 | ------------------------------------------------------------------------------------------------------------------------------------ M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F275W 1 1 none none 1 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F275W 1 2 none none 1 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F275W 1 3 none none 1 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F275W 2 1 none none 2 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F275W 2 2 none none 2 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F275W 2 3 none none 2 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F275W 3 1 none none 3 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F275W 3 2 none none 3 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F275W 3 3 none none 3 822 S S TER 18331( 4) - 09-Sep-2026 12:40:03 - [ 10] Visit: 06 (Field3-F336W) Visit Requirements: SAME ORIENT AS 05 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 M82-FIELD3 WFC3/UVI ACCUM UVIS-CENT F336W FLASH=17 1 822 S PATTERN 3 1 S ER (4932 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 | ------------------------------------------------------------------------------------------------------------------------------------ M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F336W 1 1 none none 1 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F336W 1 2 none none 1 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F336W 2 1 none none 1 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F336W 2 2 none none 2 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F336W 3 1 none none 2 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F336W 3 2 none none 2 N/A S TER 18331( 4) - 09-Sep-2026 12:40:03 - [ 11] Visit: 07 (Field3-F475W) Visit Requirements: SAME ORIENT AS 05 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 M82-FIELD3 WFC3/UVI ACCUM UVIS-CENT F475W 1 832 S PATTERN 3 1 S ER (4992 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 | ------------------------------------------------------------------------------------------------------------------------------------ M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 1 none none 1 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 2 none none 1 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 1 none none 1 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 2 none none 2 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F475W 3 1 none none 2 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F475W 3 2 none none 2 N/A S TER 18331( 4) - 09-Sep-2026 12:40:03 - [ 12] Visit: 08 (Field3-F814W) Visit Requirements: SAME ORIENT AS 05 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 M82-FIELD3 WFC3/UVI ACCUM UVIS-CENT F814W 1 832 S PATTERN 3 1 S ER (4992 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 | ------------------------------------------------------------------------------------------------------------------------------------ M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F814W 1 1 none none 1 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F814W 1 2 none none 1 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F814W 2 1 none none 1 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F814W 2 2 none none 2 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F814W 3 1 none none 2 N/A S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F814W 3 2 none none 2 N/A S TER 18331( 4) - 09-Sep-2026 12:40:03 - [ 13] Visit: 09 (Field3-F656N-1) Visit Requirements: SAME ORIENT AS 05 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 M82-FIELD3 WFC3/UVI ACCUM UVIS-CENT F656N FLASH=15 1 842 S PATTERN 2 1 S ER see below (7398 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 | ------------------------------------------------------------------------------------------------------------------------------------ M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 1 1 none none 1 822.0 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 1 2 none none 1 822.0 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 1 3 none none 1 822.0 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 2 1 none none 2 822.0 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 2 2 none none 2 822.0 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 2 3 none none 2 822.0 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 3 1 none none 3 822.0 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 3 2 none none 3 822.0 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 3 3 none none 3 822.0 S S TER 18331( 4) - 09-Sep-2026 12:40:03 - [ 14] Visit: 10 (Field3-F656N-2) Visit Requirements: SAME ORIENT AS 05 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 M82-FIELD3 WFC3/UVI ACCUM UVIS-CENT F656N FLASH=15 1 832 S PATTERN 2 1 S ER see below (7398 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 | ------------------------------------------------------------------------------------------------------------------------------------ M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 1 1 none none 1 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 1 2 none none 1 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 1 3 none none 1 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 2 1 none none 2 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 2 2 none none 2 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 2 3 none none 2 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 3 1 none none 3 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 3 2 none none 3 822 S S TER M82-FIELD3 1 WFC3/UVI ACCUM UVIS-CEN F656N 3 3 none none 3 822 S S TER 18331( 4) - 09-Sep-2026 12:40:03 - [ 15] Summary Form for Proposal 18331 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS-CENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=15, FLASH=17 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 2 1, PATTERN 3 1, SAME ORIENT AS 01, SAME ORIENT AS 03, SAME ORIENT AS 05 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F275W, F336W, F475W, F656N, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names M82-FIELD1, M82-FIELD2, M82-FIELD3 ------------------------------------------------------------------------------------------------------------------------------------