18038( 4) - 11-Nov-2025 15:19:25 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 18038 Version: 4 Check-in Time: 11-Nov-2025 15:19:25 STScI Edit Number: 0 Title Unravel the Puzzles of Little Red Dots: HST View on Local Analogs ------------------------------------------------------------------------------------ Type Cycle GO 33 ------------------------------------------------------------------------------------ Investigators Contact? PI: Ms. Xiaojing Lin Tsinghua University Y CoI: Prof. Xiaohui Fan University of Arizona Y CoI: Dr. Fengwu Sun Harvard University N CoI: Prof. Jenny Emma Greene Princeton University N CoI: Yilun Ma Princeton University N CoI: Dr. David Setton Princeton University N CoI: Dr. Zheng Cai Tsinghua University N CoI: Dr. Eiichi Egami University of Arizona N CoI: Dr. Fuyan Bian European Southern Observatory - Chile N CoI: Dr. Junjie Mao Tsinghua University N CoI: Dr. Jinyi Yang University of Michigan N CoI: Dr. Michael A. Strauss Princeton University N ------------------------------------------------------------------------------------ Abstract One of the most impactful early discoveries from JWST is the ubiquity of "little red dots" (LRDs) at z=2-10. LRDs are characterized by broad hydrogen emission lines and v-shaped SEDs (blue UV and red optical continua), interpreted as low-luminosity AGNs. A significant fraction of LRDs also exhibit Balmer absorption and Balmer breaks, which could be produced by a shell of dense gas surrounding the black hole. However, these models leave many degeneracies, particularly regarding the origin of the UV light. Spatially decomposing AGN and stellar light, as well as LyA observations, is the most direct way to test these LRD models. Yet at high redshift, LRDs are too faint and compact for such decomposition, even with JWST. Local analogs of LRDs provide the best opportunities to unravel the physical nature of this population. We propose HST UVIS imaging and STIS spectroscopy on three LRD analogs at z=0.1-0.3. These analogs, selected from SDSS, exhibit emission line profiles, UV-to-optical SEDs and Balmer absorptions that most closely resemble those of high-redshift LRDs. They establish an effective testbed and benchmark for LRD studies at z>2. By spatially resolving their UV-to-optical continua and mapping their Lya profile, we aim to: (1) unravel the origin of UV light, separate AGN and galaxy contributions and obtain a resolved view of host galaxies, (2) reveal the existence and measure the density and size of the hydrogen gas envelops surrounding the center BH. Fully leveraging the unique UV capabilities of HST in both imaging and spectroscopy, this program will directly test theoretical hypotheses of LRDs and address one of the most debated questions since the launch of JWST. ------------------------------------------------------------------------------------ Observations Description ------------------------ Imaging: We propose WFC3 UVIS imaging with F225W+F336W for all three targets, and medium-band filters tailored to each: F467M+F621M for J1025+1402; 18038( 4) - 11-Nov-2025 15:19:25 - [ 2] F467M+F689M for J1047+0739; and F547M+F689M for J1022+0841. These medium bands are selected to map the continuum in line-free windows between the Balmer break, [O III]4960, 5008, and Ha, tracing the Balmer break strength when combined with UV filters. Spectroscopy: STIS G140L with 52x0.5 slit. It offers high sensitivity in the FUV range and provides adequate spectral resolution (R~1000) to measure their Lya properties. Exposure Time (using HST ETC v33.1): (1) Imaging: We estimate the UV surface brightness from GALEX and SDSS-u photometry to be approximately 3e-18 to 5e-18 erg/s/cm2/A/arcsec2, and derive the optical surface brightness from SDSS photometry. We aim to achieve a signal-to-noise ratio (S/N) of at least 3 per 5x5 pixel region. For each target, we request 2 orbits for the F225W filter, 1 orbit for F336W, and 2 orbits for the medium-band filters. This results in 5 UVIS imaging orbits per object, or a total of 15 orbits for all three targets. (2) STIS spectroscopy: Based on the spectra of the most similar high-z LRDs to the proposed targets, we estimate their underlying continua around the Lya line to be in the range of 1e-16 to 5e-17 erg/s/cm2/A. We aim to achieve S/N > 3 per resolution element to resolve Lya profiles. We therefore propose 3 orbits of STIS G140L observations for each of the two targets at z = 0.1, and 4 orbits for J1022+0841 due to its fainter flux. ------------------------------------------------------------------------------------ 18038( 4) - 11-Nov-2025 15:19:25 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 J1025+1402 GALAXY, NUCLEUS, QSO, RA=10H25M30.2924S, J2000 Z = V = 19.45 +/- 0.01 g=20.07, r=19.00, QUASAR DEC=+14D02'7.44" 0.1007 i=18.22, z=18.16 Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 J1047+0739 GALAXY, NUCLEUS, QSO, RA=10H47M55.9200S, J2000 Z = V = 19.31 g=19.95, r=18.85, i=18.33, QUASAR DEC=+07D39'51.12" 0.16828 z=18.69 Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 J1022+0841 GALAXY, NUCLEUS, QSO, RA=10H22M8.5260S, J2000 Z = V = 20.58 g=21.38, r=20.01, i=18.89, QUASAR DEC=+08D41'56.12" 0.222695 z=19.23 8 Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 18038( 4) - 11-Nov-2025 15:19:25 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.173 Line_Spacing 0.112 Coordinate_Frame POS-TARG Pattern_Orient 23.884 Angle_Between_Sides 81.785 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type STIS-ALONG-SLIT Pattern_Purpose DITHER Number_Of_Points 5 Point_Spacing 0.235 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 90.0 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 Primary_Pattern Secondary_Pattern Pattern_Type STIS-ALONG-SLIT Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.235 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 90.0 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 18038( 4) - 11-Nov-2025 15:19:25 - [ 5] Visit: 01 (J1025 UV imaging) 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 J1025+1402 WFC3/UVI ACCUM UVIS2-C51 F225W FLASH=18 1 1200 S PATTERN 1 1 S 2C-CTE see below (4840 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1025+1402 WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=18 1 450 S PATTERN 1 2 S 2C-CTE see below (2120 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1025+1402 1 WFC3/UVI ACCUM UVIS2-C5 F225W 1 none none none 1 1210.0 S S 12C-CTE J1025+1402 1 WFC3/UVI ACCUM UVIS2-C5 F225W 2 none none none 1 1210.0 S S 12C-CTE J1025+1402 1 WFC3/UVI ACCUM UVIS2-C5 F225W 3 none none none 2 1210.0 S S 12C-CTE J1025+1402 1 WFC3/UVI ACCUM UVIS2-C5 F225W 4 none none none 2 1210.0 S S 12C-CTE J1025+1402 2 WFC3/UVI ACCUM UVIS2-C5 F336W 1 none none none 3 530.0 S S 12C-CTE J1025+1402 2 WFC3/UVI ACCUM UVIS2-C5 F336W 2 none none none 3 530.0 S S 12C-CTE J1025+1402 2 WFC3/UVI ACCUM UVIS2-C5 F336W 3 none none none 3 530.0 S S 12C-CTE J1025+1402 2 WFC3/UVI ACCUM UVIS2-C5 F336W 4 none none none 3 530.0 S S 12C-CTE 18038( 4) - 11-Nov-2025 15:19:25 - [ 6] Visit: 02 (J1025 Optical imaging) 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 J1025+1402 WFC3/UVI ACCUM UVIS2-C51 F467M FLASH=16 1 500 S PATTERN 1 1 S 2C-CTE see below (2140 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1025+1402 WFC3/UVI ACCUM UVIS2-C51 F621M FLASH=16 1 500 S PATTERN 1 2 S 2C-CTE see below (2120 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1025+1402 1 WFC3/UVI ACCUM UVIS2-C5 F467M 1 none none none 1 535.0 S S 12C-CTE J1025+1402 1 WFC3/UVI ACCUM UVIS2-C5 F467M 2 none none none 1 535.0 S S 12C-CTE J1025+1402 1 WFC3/UVI ACCUM UVIS2-C5 F467M 3 none none none 1 535.0 S S 12C-CTE J1025+1402 1 WFC3/UVI ACCUM UVIS2-C5 F467M 4 none none none 1 535.0 S S 12C-CTE J1025+1402 2 WFC3/UVI ACCUM UVIS2-C5 F621M 1 none none none 2 530.0 S S 12C-CTE J1025+1402 2 WFC3/UVI ACCUM UVIS2-C5 F621M 2 none none none 2 530.0 S S 12C-CTE J1025+1402 2 WFC3/UVI ACCUM UVIS2-C5 F621M 3 none none none 2 530.0 S S 12C-CTE J1025+1402 2 WFC3/UVI ACCUM UVIS2-C5 F621M 4 none none none 2 530.0 S S 12C-CTE 18038( 4) - 11-Nov-2025 15:19:25 - [ 7] Visit: 03 (J1025 STIS) 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 J1025+1402 STIS/CCD ACQ F28X50LP MIRROR ACQTYPE=POINT 1 40 S (40 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1025+1402 STIS/FUV ACCUM 52X0.5D1 G140L 1425 1 1100 S POS TARG 0.0, 3; PATTERN -MAMA see below 2 2 (6470 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1025+1402 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A J1025+1402 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 1 none none none 1 1850.0 S -MAMA J1025+1402 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 2 none none none 2 1080.0 S -MAMA J1025+1402 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 3 none none none 2 1080.0 S -MAMA J1025+1402 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 4 none none none 3 1090.0 S -MAMA J1025+1402 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 5 none none none 3 1370.0 S -MAMA 18038( 4) - 11-Nov-2025 15:19:25 - [ 8] Visit: 04 (J1047 UV imaging) 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 J1047+0739 WFC3/UVI ACCUM UVIS2-C51 F225W FLASH=18 1 1200 S PATTERN 1 1 S 2C-CTE see below (4840 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1047+0739 WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=18 1 450 S PATTERN 1 2 S 2C-CTE see below (2120 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1047+0739 1 WFC3/UVI ACCUM UVIS2-C5 F225W 1 none none none 1 1210.0 S S 12C-CTE J1047+0739 1 WFC3/UVI ACCUM UVIS2-C5 F225W 2 none none none 1 1210.0 S S 12C-CTE J1047+0739 1 WFC3/UVI ACCUM UVIS2-C5 F225W 3 none none none 2 1210 S S 12C-CTE J1047+0739 1 WFC3/UVI ACCUM UVIS2-C5 F225W 4 none none none 2 1210 S S 12C-CTE J1047+0739 2 WFC3/UVI ACCUM UVIS2-C5 F336W 1 none none none 3 530.0 S S 12C-CTE J1047+0739 2 WFC3/UVI ACCUM UVIS2-C5 F336W 2 none none none 3 530.0 S S 12C-CTE J1047+0739 2 WFC3/UVI ACCUM UVIS2-C5 F336W 3 none none none 3 530.0 S S 12C-CTE J1047+0739 2 WFC3/UVI ACCUM UVIS2-C5 F336W 4 none none none 3 530.0 S S 12C-CTE 18038( 4) - 11-Nov-2025 15:19:25 - [ 9] Visit: 05 (J1047 optical imaging) 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 J1047+0739 WFC3/UVI ACCUM UVIS2-C51 F467M FLASH=16 1 500 S PATTERN 1 1 S 2C-CTE see below (2140 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1047+0739 WFC3/UVI ACCUM UVIS2-C51 F689M FLASH=16 1 500 S PATTERN 1 2 S 2C-CTE see below (2140 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1047+0739 1 WFC3/UVI ACCUM UVIS2-C5 F467M 1 none none none 1 535 S S 12C-CTE J1047+0739 1 WFC3/UVI ACCUM UVIS2-C5 F467M 2 none none none 1 535 S S 12C-CTE J1047+0739 1 WFC3/UVI ACCUM UVIS2-C5 F467M 3 none none none 1 535 S S 12C-CTE J1047+0739 1 WFC3/UVI ACCUM UVIS2-C5 F467M 4 none none none 1 535 S S 12C-CTE J1047+0739 2 WFC3/UVI ACCUM UVIS2-C5 F689M 1 none none none 2 535.0 S S 12C-CTE J1047+0739 2 WFC3/UVI ACCUM UVIS2-C5 F689M 2 none none none 2 535.0 S S 12C-CTE J1047+0739 2 WFC3/UVI ACCUM UVIS2-C5 F689M 3 none none none 2 535.0 S S 12C-CTE J1047+0739 2 WFC3/UVI ACCUM UVIS2-C5 F689M 4 none none none 2 535.0 S S 12C-CTE 18038( 4) - 11-Nov-2025 15:19:25 - [ 10] Visit: 06 (J1047 STIS) 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 J1047+0739 STIS/CCD ACQ F28X50LP MIRROR ACQTYPE=POINT 1 40 S (40 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1047+0739 STIS/FUV ACCUM 52X0.5D1 G140L 1425 1 1100 S POS TARG 0, 3; PATTERN 2 -MAMA see below 2 (6300 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1047+0739 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A J1047+0739 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 1 none none none 1 1900.0 S -MAMA J1047+0739 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 2 none none none 2 1100 S -MAMA J1047+0739 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 3 none none none 2 1100 S -MAMA J1047+0739 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 4 none none none 3 1100 S -MAMA J1047+0739 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 5 none none none 3 1100 S -MAMA 18038( 4) - 11-Nov-2025 15:19:25 - [ 11] Visit: 07 (J1022 UV imaging) 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 J1022+0841 WFC3/UVI ACCUM UVIS2-C51 F225W FLASH=18 1 1200 S PATTERN 1 1 S 2C-CTE see below (4840 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1022+0841 WFC3/UVI ACCUM UVIS2-C51 F336W FLASH=18 1 450 S PATTERN 1 2 S 2C-CTE see below (2120 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1022+0841 1 WFC3/UVI ACCUM UVIS2-C5 F225W 1 none none none 1 1210 S S 12C-CTE J1022+0841 1 WFC3/UVI ACCUM UVIS2-C5 F225W 2 none none none 1 1210 S S 12C-CTE J1022+0841 1 WFC3/UVI ACCUM UVIS2-C5 F225W 3 none none none 2 1210 S S 12C-CTE J1022+0841 1 WFC3/UVI ACCUM UVIS2-C5 F225W 4 none none none 2 1210 S S 12C-CTE J1022+0841 2 WFC3/UVI ACCUM UVIS2-C5 F336W 1 none none none 3 530 S S 12C-CTE J1022+0841 2 WFC3/UVI ACCUM UVIS2-C5 F336W 2 none none none 3 530 S S 12C-CTE J1022+0841 2 WFC3/UVI ACCUM UVIS2-C5 F336W 3 none none none 3 530 S S 12C-CTE J1022+0841 2 WFC3/UVI ACCUM UVIS2-C5 F336W 4 none none none 3 530 S S 12C-CTE 18038( 4) - 11-Nov-2025 15:19:25 - [ 12] Visit: 08 (J1022 imaging) 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 J1022+0841 WFC3/UVI ACCUM UVIS2-C51 F547M FLASH=16 1 500 S PATTERN 1 1 S 2C-CTE see below (2160 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1022+0841 WFC3/UVI ACCUM UVIS2-C51 F689M FLASH=16 1 500 S PATTERN 1 2 S 2C-CTE see below (2120 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1022+0841 1 WFC3/UVI ACCUM UVIS2-C5 F547M 1 none none none 1 550 S S 12C-CTE J1022+0841 1 WFC3/UVI ACCUM UVIS2-C5 F547M 2 none none none 1 550 S S 12C-CTE J1022+0841 1 WFC3/UVI ACCUM UVIS2-C5 F547M 3 none none none 1 530 S S 12C-CTE J1022+0841 1 WFC3/UVI ACCUM UVIS2-C5 F547M 4 none none none 1 530 S S 12C-CTE J1022+0841 2 WFC3/UVI ACCUM UVIS2-C5 F689M 1 none none none 2 530 S S 12C-CTE J1022+0841 2 WFC3/UVI ACCUM UVIS2-C5 F689M 2 none none none 2 530 S S 12C-CTE J1022+0841 2 WFC3/UVI ACCUM UVIS2-C5 F689M 3 none none none 2 530 S S 12C-CTE J1022+0841 2 WFC3/UVI ACCUM UVIS2-C5 F689M 4 none none none 2 530 S S 12C-CTE 18038( 4) - 11-Nov-2025 15:19:25 - [ 13] Visit: 09 (J1022 STIS) 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 J1022+0841 STIS/CCD ACQ F28X50LP MIRROR 1 100 S (100 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1022+0841 STIS/FUV ACCUM 52X0.5D1 G140L 1425 1 1100 S POS TARG 0, 3; PATTERN 3 -MAMA see below 2 (3870 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1022+0841 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A J1022+0841 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 1 none none none 1 1670.0 S -MAMA J1022+0841 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 2 none none none 2 1100 S -MAMA J1022+0841 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 3 none none none 2 1100 S -MAMA 18038( 4) - 11-Nov-2025 15:19:25 - [ 14] Visit: 10 (J1022 STIS) 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 J1022+0841 STIS/CCD ACQ F28X50LP MIRROR 1 100 S (100 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1022+0841 STIS/FUV ACCUM 52X0.5D1 G140L 1425 1 1100 S POS TARG 0, 3; PATTERN 3 -MAMA see below 2 (3870 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1022+0841 1 STIS/CCD ACQ F28X50LP MIRROR none none none none 1 N/A J1022+0841 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 1 none none none 1 1670 S -MAMA J1022+0841 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 2 none none none 2 1100.0 S -MAMA J1022+0841 2 STIS/FUV ACCUM 52X0.5D1 G140L 1425 3 none none none 2 1100 S -MAMA 18038( 4) - 11-Nov-2025 15:19:25 - [ 15] Summary Form for Proposal 18038 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 52X0.5D1, F28X50LP, UVIS2-C512C-CTE ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ACQTYPE=POINT, FLASH=16, FLASH=18 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 1 2, PATTERN 2 2, PATTERN 3 2, POS TARG 0, 3, POS TARG 0.0, 3 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F225W, F336W, F467M, F547M, F621M, F689M, G140L, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names J1022+0841, J1025+1402, J1047+0739 ------------------------------------------------------------------------------------------------------------------------------------