17702( 7) - 27-Feb-2026 18:05:06 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17702 Version: 7 Check-in Time: 27-Feb-2026 18:05:06 STScI Edit Number: 4 Title Exploring the unexpected interplay between Lyman-alpha and C IV emission using spatially resolved imaging ------------------------------------------------------------------------------------ Type Cycle GO 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Simon Gazagnes University of Texas at Austin Y CoI: Prof. Matthew James Hayes Stockholm University N CoI: Prof. Claudia Scarlata University of Minnesota - Twin Cities N CoI: Dr. Jeremy Blaizot Centre de Recherche Astrophysique de Lyon N CoI: Dr. Thibault Garel University of Geneva, Department of N Astronomy CoI: Prof. Anne Verhamme University of Geneva, Department of N Astronomy CoI: Dr. Floriane Leclercq Centre de Recherche Astrophysique de Lyon N CoI: Mr. Valentin Mauerhofer University of Geneva, Department of N Astronomy CoI: Dr. Nika Jurlin University of Texas at Austin N CoI: Dr. Danielle Berg University of Texas at Austin Y CoI: Prof. John Chisholm University of Texas at Austin N CoI: Dr. Matilde Mingozzi Space Telescope Science Institute - ESA - N JWST ------------------------------------------------------------------------------------ Abstract The synergy between Lyman-alpha and C IV 1548, 50A is among our most promising UV diagnostics for understanding the escape of ionizing photons across all energy levels. Lya probes the properties of low-ionization gas (~13.6 eV), while C IV probes higher-energy levels (>54 eV), corresponding to photons capable of ionizing two hydrogen atoms each. Notably, both HST and JWST observations have uncovered targets with significant C IV emissions in galaxies at redshifts around 5--11. Thus, to disentangle the role of star-forming galaxies in the overall ionizing budget across various energy levels, our models must reproduce both the Lya and C IV emissions. Recent low-z observations of C IV and Lya emitters have revealed intriguing trends: galaxies with substantial C IV emission tend to exhibit larger damped Lyman-alpha absorption, whereas those with prominent Lya emission often display weak or no C IV absorption. This contrasting behavior challenges our current understanding of the interplay between hard ionizing fields and the escape of ionizing photons. It suggests that galaxies with hard ionizing sources may not significantly contribute to reionization due to being embedded in large opaque H I clouds. Here, we propose 25 orbits of HST ACS/SBC observations to spatially resolve the Lya, C IV, and UV emission in a sample of 8 star-forming galaxies at a redshift ~ 0. Four galaxies exhibit strong C IV emission and damped Lya absorption and four have weak C IV emission and dominant Lya emission. The requested observations are essential for improving our understanding of the Lya and C IV synergy and determining the contribution of C IV emitting galaxies to reionization. ------------------------------------------------------------------------------------ 17702( 7) - 27-Feb-2026 18:05:06 - [ 2] Observations Description ------------------------ The goal of this proposal is to map to map and compare the morphology of the Lyalpha, C iv, and UV continuum with a spatial resolution down to 10 pc in a sample of eight local star-forming galaxies (including 3 archival) with weak and strong Lyalpha and C iv emission using HST ACS/SBC. We request ACS/SBC F125LP, F140LP, F150LP and F165LP to cover Ly alpha, FUV continuum, the CIV 1548, 51 and also the HeII1640+[OIII]1661, emission lines. We expect that the targeted emission will be well captured in one pointing of the ACS/SBC (34.6"x30") with sufficient space for background subtraction. ETCs: To estimate exposure times, we took advantage of each target's archival COS spectrum, from which we measured the stellar continuum and emission line surface brightnesses in the COS aperture (2.5"x2.5"). We used these values as input for the ACS Exposure Time Calculators (ETC). We assumed that the targeted line emission is coming from an extended region with an aperture of 2.5". ACS/SBC observations: We request SHADOW for the F125LP filter to mitigate the bright geocoronal Ly-alpha emission and geocoronal line OI1302. We used the ACS-SBC-DITHER-BOX pattern for all exposures. ------------------------------------------------------------------------------------ 17702( 7) - 27-Feb-2026 18:05:06 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 J1253-0312 GALAXY, STARBURST RA=12H53M5.9600S, J2000 V = 15.85 DEC=-03D12'58.84" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 J1325-1136 GALAXY, STARBURST RA=13H25M48.6413S, J2000 V = 17.43 DEC=-11D36'37.94" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 J0947+4138 GALAXY, STARBURST RA=09H47M18.2410S, J2000 V = 17.57 DEC=+41D38'16.44" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 4 J1202+5416 GALAXY, STARBURST RA=12H02M2.4925S, J2000 V = 19.5 DEC=+54D15'51.05" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 5 J1331+4151 GALAXY, STARBURST RA=13H31M26.8799S, J2000 V = 17.29 DEC=+41D51'48.24" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 17702( 7) - 27-Feb-2026 18:05:06 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-SBC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.179 Line_Spacing 0.116 Coordinate_Frame POS-TARG Pattern_Orient 20.02 Angle_Between_Sides 63.65 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type ACS-SBC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.472 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 44.4 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 17702( 7) - 27-Feb-2026 18:05:06 - [ 5] Visit: 01 (J1253 - 1) 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 J1253-0312 ACS/SBC ACCUM SBC-FIX F125LP 1 135 S (540 SHADOW; PATTERN 1 1-4 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1253-0312 ACS/SBC ACCUM SBC-FIX F140LP 1 130 S (520 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J1253-0312 ACS/SBC ACCUM SBC-FIX F150LP 1 175 S (700 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J1253-0312 ACS/SBC ACCUM SBC-FIX F165LP 1 505 S (2020 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1253-0312 1 ACS/SBC ACCUM SBC-FIX F125LP 1 none none none 1 N/A J1253-0312 1 ACS/SBC ACCUM SBC-FIX F125LP 2 none none none 1 N/A J1253-0312 1 ACS/SBC ACCUM SBC-FIX F125LP 3 none none none 2 N/A J1253-0312 1 ACS/SBC ACCUM SBC-FIX F125LP 4 none none none 2 N/A J1253-0312 2 ACS/SBC ACCUM SBC-FIX F140LP 1 none none none 1 N/A J1253-0312 2 ACS/SBC ACCUM SBC-FIX F140LP 2 none none none 1 N/A J1253-0312 2 ACS/SBC ACCUM SBC-FIX F140LP 3 none none none 2 N/A J1253-0312 2 ACS/SBC ACCUM SBC-FIX F140LP 4 none none none 2 N/A J1253-0312 3 ACS/SBC ACCUM SBC-FIX F150LP 1 none none none 1 N/A J1253-0312 3 ACS/SBC ACCUM SBC-FIX F150LP 2 none none none 1 N/A J1253-0312 3 ACS/SBC ACCUM SBC-FIX F150LP 3 none none none 2 N/A J1253-0312 3 ACS/SBC ACCUM SBC-FIX F150LP 4 none none none 2 N/A J1253-0312 4 ACS/SBC ACCUM SBC-FIX F165LP 1 none none none 1 N/A J1253-0312 4 ACS/SBC ACCUM SBC-FIX F165LP 2 none none none 1 N/A J1253-0312 4 ACS/SBC ACCUM SBC-FIX F165LP 3 none none none 2 N/A J1253-0312 4 ACS/SBC ACCUM SBC-FIX F165LP 4 none none none 2 N/A 17702( 7) - 27-Feb-2026 18:05:06 - [ 6] Visit: 02 (J1325 - 1) 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 J1325-1136 ACS/SBC ACCUM SBC-FIX F125LP 1 300 S (600 SHADOW; PATTERN 2 1-4 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1325-1136 ACS/SBC ACCUM SBC-FIX F140LP 1 410 S (820 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J1325-1136 ACS/SBC ACCUM SBC-FIX F150LP 1 750 S (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J1325-1136 ACS/SBC ACCUM SBC-FIX F165LP 1 690 S (1380 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1325-1136 1 ACS/SBC ACCUM SBC-FIX F125LP 1 none none none 1 N/A J1325-1136 1 ACS/SBC ACCUM SBC-FIX F125LP 2 none none none 2 N/A J1325-1136 2 ACS/SBC ACCUM SBC-FIX F140LP 1 none none none 1 N/A J1325-1136 2 ACS/SBC ACCUM SBC-FIX F140LP 2 none none none 2 N/A J1325-1136 3 ACS/SBC ACCUM SBC-FIX F150LP 1 none none none 1 N/A J1325-1136 3 ACS/SBC ACCUM SBC-FIX F150LP 2 none none none 2 N/A J1325-1136 4 ACS/SBC ACCUM SBC-FIX F165LP 1 none none none 1 N/A J1325-1136 4 ACS/SBC ACCUM SBC-FIX F165LP 2 none none none 2 N/A 17702( 7) - 27-Feb-2026 18:05:06 - [ 7] Visit: 04 (J0947 - 3) 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 J0947+4138 ACS/SBC ACCUM SBC-FIX F165LP 1 595 S PATTERN 2 1-2 see below (2448 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J0947+4138 ACS/SBC ACCUM SBC-FIX F125LP 1 650 S see below (2558 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 | ------------------------------------------------------------------------------------------------------------------------------------ J0947+4138 1 ACS/SBC ACCUM SBC-FIX F165LP 1 none none none 1 1218.0 S J0947+4138 1 ACS/SBC ACCUM SBC-FIX F165LP 2 none none none 2 1230.0 S J0947+4138 2 ACS/SBC ACCUM SBC-FIX F125LP 1 none none none 1 1273.0 S J0947+4138 2 ACS/SBC ACCUM SBC-FIX F125LP 2 none none none 2 1285.0 S 17702( 7) - 27-Feb-2026 18:05:06 - [ 8] Visit: 05 (J1202 - 1) 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 J1202+5416 ACS/SBC ACCUM SBC-FIX F125LP 1 450 S SHADOW; PATTERN 1 1-2 (1800 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1202+5416 ACS/SBC ACCUM SBC-FIX F140LP 1 650 S (2600 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1202+5416 1 ACS/SBC ACCUM SBC-FIX F125LP 1 none none none 1 N/A J1202+5416 1 ACS/SBC ACCUM SBC-FIX F125LP 2 none none none 1 N/A J1202+5416 1 ACS/SBC ACCUM SBC-FIX F125LP 3 none none none 2 N/A J1202+5416 1 ACS/SBC ACCUM SBC-FIX F125LP 4 none none none 2 N/A J1202+5416 2 ACS/SBC ACCUM SBC-FIX F140LP 1 none none none 1 N/A J1202+5416 2 ACS/SBC ACCUM SBC-FIX F140LP 2 none none none 1 N/A J1202+5416 2 ACS/SBC ACCUM SBC-FIX F140LP 3 none none none 2 N/A J1202+5416 2 ACS/SBC ACCUM SBC-FIX F140LP 4 none none none 2 N/A 17702( 7) - 27-Feb-2026 18:05:06 - [ 9] Visit: 06 (J1202 - 2) 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 J1202+5416 ACS/SBC ACCUM SBC-FIX F165LP 1 500 S PATTERN 2 1-2 see below (2153 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1202+5416 ACS/SBC ACCUM SBC-FIX F150LP 1 900 S see below (2953 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1202+5416 1 ACS/SBC ACCUM SBC-FIX F165LP 1 none none none 1 1067.0 S J1202+5416 1 ACS/SBC ACCUM SBC-FIX F165LP 2 none none none 2 1086.0 S J1202+5416 2 ACS/SBC ACCUM SBC-FIX F150LP 1 none none none 1 1467.0 S J1202+5416 2 ACS/SBC ACCUM SBC-FIX F150LP 2 none none none 2 1486.0 S 17702( 7) - 27-Feb-2026 18:05:06 - [ 10] Visit: 07 (J1331 - 1) 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 J1331+4151 ACS/SBC ACCUM SBC-FIX F125LP 1 300 S (600 SHADOW; GS ACQ SCENARIO S) BASE1O3; PATTERN 2 1-4 ------------------------------------------------------------------------------------------------------------------------------------ 2 J1331+4151 ACS/SBC ACCUM SBC-FIX F140LP 1 400 S (800 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J1331+4151 ACS/SBC ACCUM SBC-FIX F165LP 1 670 S (1340 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J1331+4151 ACS/SBC ACCUM SBC-FIX F150LP 1 820 S (1640 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1331+4151 1 ACS/SBC ACCUM SBC-FIX F125LP 1 none none none 1 N/A J1331+4151 1 ACS/SBC ACCUM SBC-FIX F125LP 2 none none none 2 N/A J1331+4151 2 ACS/SBC ACCUM SBC-FIX F140LP 1 none none none 1 N/A J1331+4151 2 ACS/SBC ACCUM SBC-FIX F140LP 2 none none none 2 N/A J1331+4151 3 ACS/SBC ACCUM SBC-FIX F165LP 1 none none none 1 N/A J1331+4151 3 ACS/SBC ACCUM SBC-FIX F165LP 2 none none none 2 N/A J1331+4151 4 ACS/SBC ACCUM SBC-FIX F150LP 1 none none none 1 N/A J1331+4151 4 ACS/SBC ACCUM SBC-FIX F150LP 2 none none none 2 N/A 17702( 7) - 27-Feb-2026 18:05:06 - [ 11] Visit: 08 (J0947 - 1) 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 J0947+4138 ACS/SBC ACCUM SBC-FIX F125LP 1 1150 S SHADOW; PATTERN 2 1-3 (2300 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J0947+4138 ACS/SBC ACCUM SBC-FIX F140LP 1 1025 S (2050 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J0947+4138 ACS/SBC ACCUM SBC-FIX F165LP 1 100 S (200 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 | ------------------------------------------------------------------------------------------------------------------------------------ J0947+4138 1 ACS/SBC ACCUM SBC-FIX F125LP 1 none none none 1 N/A J0947+4138 1 ACS/SBC ACCUM SBC-FIX F125LP 2 none none none 2 N/A J0947+4138 2 ACS/SBC ACCUM SBC-FIX F140LP 1 none none none 1 N/A J0947+4138 2 ACS/SBC ACCUM SBC-FIX F140LP 2 none none none 2 N/A J0947+4138 3 ACS/SBC ACCUM SBC-FIX F165LP 1 none none none 1 N/A J0947+4138 3 ACS/SBC ACCUM SBC-FIX F165LP 2 none none none 2 N/A 17702( 7) - 27-Feb-2026 18:05:06 - [ 12] Visit: 09 (J0947 - 2) 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 J0947+4138 ACS/SBC ACCUM SBC-FIX F125LP 1 1150 S POS TARG 0.065, 0; (2300 S) SHADOW; PATTERN 2 1-3 ------------------------------------------------------------------------------------------------------------------------------------ 2 J0947+4138 ACS/SBC ACCUM SBC-FIX F140LP 1 1025 S POS TARG 0.065, 0. (2050 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J0947+4138 ACS/SBC ACCUM SBC-FIX F165LP 1 100 S (200 POS TARG 0.065, 0.0 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 | ------------------------------------------------------------------------------------------------------------------------------------ J0947+4138 1 ACS/SBC ACCUM SBC-FIX F125LP 1 none none none 1 N/A J0947+4138 1 ACS/SBC ACCUM SBC-FIX F125LP 2 none none none 2 N/A J0947+4138 2 ACS/SBC ACCUM SBC-FIX F140LP 1 none none none 1 N/A J0947+4138 2 ACS/SBC ACCUM SBC-FIX F140LP 2 none none none 2 N/A J0947+4138 3 ACS/SBC ACCUM SBC-FIX F165LP 1 none none none 1 N/A J0947+4138 3 ACS/SBC ACCUM SBC-FIX F165LP 2 none none none 2 N/A 17702( 7) - 27-Feb-2026 18:05:06 - [ 13] Visit: 10 (J1325 - 2) 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 J1325-1136 ACS/SBC ACCUM SBC-FIX F125LP 1 300 S (600 POS TARG 0.065, null; S) SHADOW; PATTERN 2 1-4 ------------------------------------------------------------------------------------------------------------------------------------ 2 J1325-1136 ACS/SBC ACCUM SBC-FIX F140LP 1 410 S (820 POS TARG 0.065, null S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J1325-1136 ACS/SBC ACCUM SBC-FIX F150LP 1 750 S POS TARG 0.065, null (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J1325-1136 ACS/SBC ACCUM SBC-FIX F165LP 1 690 S POS TARG 0.065, null (1380 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1325-1136 1 ACS/SBC ACCUM SBC-FIX F125LP 1 none none none 1 N/A J1325-1136 1 ACS/SBC ACCUM SBC-FIX F125LP 2 none none none 2 N/A J1325-1136 2 ACS/SBC ACCUM SBC-FIX F140LP 1 none none none 1 N/A J1325-1136 2 ACS/SBC ACCUM SBC-FIX F140LP 2 none none none 2 N/A J1325-1136 3 ACS/SBC ACCUM SBC-FIX F150LP 1 none none none 1 N/A J1325-1136 3 ACS/SBC ACCUM SBC-FIX F150LP 2 none none none 2 N/A J1325-1136 4 ACS/SBC ACCUM SBC-FIX F165LP 1 none none none 1 N/A J1325-1136 4 ACS/SBC ACCUM SBC-FIX F165LP 2 none none none 2 N/A 17702( 7) - 27-Feb-2026 18:05:06 - [ 14] Visit: 11 (J0947 - 5) 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 J0947+4138 ACS/SBC ACCUM SBC-FIX F125LP 1 500 S PATTERN 2 1 see below (2528 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 | ------------------------------------------------------------------------------------------------------------------------------------ J0947+4138 1 ACS/SBC ACCUM SBC-FIX F125LP 1 none none none 1 1264.0 S J0947+4138 1 ACS/SBC ACCUM SBC-FIX F125LP 2 none none none 1 1264.0 S 17702( 7) - 27-Feb-2026 18:05:06 - [ 15] Visit: 12 (J0947 - 4) 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 J0947+4138 ACS/SBC ACCUM SBC-FIX F165LP 1 580 S POS TARG 0.065, null; see below PATTERN 2 1-2 (2533 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J0947+4138 ACS/SBC ACCUM SBC-FIX F125LP 1 550 S POS TARG 0.065, null see below (2473 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 | ------------------------------------------------------------------------------------------------------------------------------------ J0947+4138 1 ACS/SBC ACCUM SBC-FIX F165LP 1 none none none 1 1260.0 S J0947+4138 1 ACS/SBC ACCUM SBC-FIX F165LP 2 none none none 2 1273.0 S J0947+4138 2 ACS/SBC ACCUM SBC-FIX F125LP 1 none none none 1 1230.0 S J0947+4138 2 ACS/SBC ACCUM SBC-FIX F125LP 2 none none none 2 1243.0 S 17702( 7) - 27-Feb-2026 18:05:06 - [ 16] Visit: 13 (J1202 - 3) 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 J1202+5416 ACS/SBC ACCUM SBC-FIX F165LP 1 500 S POS TARG 0.065, null; see below PATTERN 2 1-2 (2153 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1202+5416 ACS/SBC ACCUM SBC-FIX F150LP 1 900 S POS TARG 0.065, null see below (2953 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1202+5416 1 ACS/SBC ACCUM SBC-FIX F165LP 1 none none none 1 1067.0 S J1202+5416 1 ACS/SBC ACCUM SBC-FIX F165LP 2 none none none 2 1086.0 S J1202+5416 2 ACS/SBC ACCUM SBC-FIX F150LP 1 none none none 1 1467.0 S J1202+5416 2 ACS/SBC ACCUM SBC-FIX F150LP 2 none none none 2 1486.0 S 17702( 7) - 27-Feb-2026 18:05:06 - [ 17] Visit: 14 (J1331 - 2) 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 J1331+4151 ACS/SBC ACCUM SBC-FIX F125LP 1 300 S (600 POS TARG 0.065, null; S) SHADOW; GS ACQ SCENARIO BASE1O3; PATTERN 2 1-4 ------------------------------------------------------------------------------------------------------------------------------------ 2 J1331+4151 ACS/SBC ACCUM SBC-FIX F140LP 1 400 S (800 POS TARG 0.065, null S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J1331+4151 ACS/SBC ACCUM SBC-FIX F165LP 1 670 S POS TARG 0.065, null (1340 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J1331+4151 ACS/SBC ACCUM SBC-FIX F150LP 1 820 S POS TARG 0.065, null (1640 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1331+4151 1 ACS/SBC ACCUM SBC-FIX F125LP 1 none none none 1 N/A J1331+4151 1 ACS/SBC ACCUM SBC-FIX F125LP 2 none none none 2 N/A J1331+4151 2 ACS/SBC ACCUM SBC-FIX F140LP 1 none none none 1 N/A J1331+4151 2 ACS/SBC ACCUM SBC-FIX F140LP 2 none none none 2 N/A J1331+4151 3 ACS/SBC ACCUM SBC-FIX F165LP 1 none none none 1 N/A J1331+4151 3 ACS/SBC ACCUM SBC-FIX F165LP 2 none none none 2 N/A J1331+4151 4 ACS/SBC ACCUM SBC-FIX F150LP 1 none none none 1 N/A J1331+4151 4 ACS/SBC ACCUM SBC-FIX F150LP 2 none none none 2 N/A 17702( 7) - 27-Feb-2026 18:05:06 - [ 18] Summary Form for Proposal 17702 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures SBC-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/SBC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GS ACQ SCENARIO BASE1O3, PATTERN 1 1-2, PATTERN 1 1-4, PATTERN 2 1, PATTERN 2 1-2, PATTERN 2 1-3, PATTERN 2 1-4, POS TARG 0.065, 0, POS TARG 0.065, 0., POS TARG 0.065, 0.0, POS TARG 0.065, null, SHADOW ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F125LP, F140LP, F150LP, F165LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names J0947+4138, J1202+5416, J1253-0312, J1325-1136, J1331+4151 ------------------------------------------------------------------------------------------------------------------------------------