17791( 3) - 09-Jun-2026 15:07:00 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17791 Version: 3 Check-in Time: 09-Jun-2026 15:07:00 STScI Edit Number: 0 Title A Race Against the Clock: Too Much Nitrogen, Too Early? ------------------------------------------------------------------------------------ Type Cycle GO 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Danielle Berg University of Texas at Austin Y CoI: Dra. Karla Ziboney Arellano University of Edinburgh, Institute for N Cordova Astronomy CoI: Dr. Bethan Lesley James Space Telescope Science Institute - ESA - N JWST CoI: Prof. John Chisholm University of Texas at Austin N CoI: Dr. Matilde Mingozzi Space Telescope Science Institute - ESA - N JWST CoI: Dr. Noah Sidney James Rogers Northwestern University N CoI: Dr. Evan D. Skillman University of Minnesota - Twin Cities N CoI: Zorayda Martinez University of Texas at Austin N ------------------------------------------------------------------------------------ Abstract Chemical abundances encode the integrated star formation over the lifetimes of galaxies. Since stars produce different metals, e.g., nitrogen and oxygen, at different times, the relative abundance of N/O acts as a clock to determine the star formation history. Specifically, N/O describes the relative ratio of moderately old stars(>100 Myr) to very young stars (<10 Myr). Recently, JWST observations of an extreme star-forming galaxy only 440 Myr after the big bang have found extremely high-energy N IV] and N III emission lines. These lines suggest that the galaxy has a super-solar N/O ratio, implying a contradiction: this galaxy has existed for < 440 Myr but still has a substantial older stellar population that is responsible for the N enrichment. This galaxy has too much N too early in the universe. However, few galaxies at any redshift have similar high-ionization N emisison. Unearthing the mechanism that produces these emission lines is required to reveal the chemical enrichment of the first galaxies. We propose 26 orbits of COS G160M + G185M spectroscopic observations of 7 local high-ionization galaxies. We will measure the FUV high-ionization emission lines (NIV], NIII, CIV, HeII, OIII], OIV), as well as describe their stellar populations. This will test the ionizing source within these galaxies and determine if the strong high-ionization emission arises from exotic non-stellar sources. These observations will map out the ionization structure of these galaxies to accurately determine their N/O values. Combined, these observations will construct a blueprint to interpret observations of the most extreme early galaxies to reveal the primitive relative abundance patterns. ------------------------------------------------------------------------------------ Observations Description ------------------------ Goal: The observational goal of our program is to use the high-resolution G160M and 17791( 3) - 09-Jun-2026 15:07:00 - [ 2] G185M gratings on COS to obtain measurements of the N IV] 1483, 1486 and N III] 1747, 1749, 1750, 1752, 1750 emission lines in 7 extreme N emission line candidates. Target Acquisition: We have excellent input coordinates for our sample from the previous optical spectroscopy studies, allowing us to utilize the ACQ/IMAGE mode for target acquisition with the PSA aperture and MirrorA for the COS/NUV configuration. For these acquitions, we have determined integration times necessary to reach a S/N >= 20. We assume a flat spectral distribution normalized by the GALEX FUV or SDSS u-band surface brightnesses, where each galaxy is compact in its optical imaging with a FWHM PSF diameter of ~2". Science Exposures: We will use the COS G160M and G185M gratings with central wavelengths determined by the redshifted location of the NIII] and NIV] emission lines in TIMETAG mode with the PSA aperture. Since not much is yet known about the behavior of the UV N III] and N IV] emission, we use the COS ETC with predicted UV line fluxes to determine the time necessary to achieve a S/N per resolution element of > 3 for the strongest lines in the NIII] multiplet. The total number of orbits necessary were determined considering the length of target visibility per orbit (APT) plus the approximate overheads: i.e., guide star acquisition (6 min), reacquisition (4 min), ACQ/IMAGE target acquisition (3 min), and science exposures (11 min for 4 exposures). We use a minimum of 2 FP-POS positions for each grating. ------------------------------------------------------------------------------------ 17791( 3) - 09-Jun-2026 15:07:00 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 J1205+4551 GALAXY, DWARF COMPACT, RA=12H05M3.5500S +/- 0.1", J2000 Z = V = 19.74 u = 20.5; FUV = 21.04; NUV = EMISSION LINE NEBULA, DEC=+45D51'50.94" +/- 0.1" 0.0654 20.58 STAR FORMING REGION Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 2 J1702+1803 GALAXY, DWARF COMPACT, RA=17H02M33.5197S +/- 0.2", J2000 Z = V = 17.9 u=22.8; FUV = 19.14 EMISSION LINE NEBULA, DEC=+18D03'6.30" +/- 0.2" 0.0425 STAR FORMING REGION Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 3 J1851+6934 GALAXY, DWARF COMPACT, RA=18H51M17.0835S +/- 0.2", J2000 Z = V = 17.0 u=19.4 EMISSION LINE NEBULA, DEC=+69D37'59.09" +/- 0.2" 0.025000 STAR FORMING REGION Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 4 J1111+5631 GALAXY, DWARF COMPACT, RA=11H11M31.0693S +/- 0.2", J2000 Z = V = 19.6 u = 20.32 EMISSION LINE NEBULA, DEC=+56D31'41.08" +/- 0.2" 0.010 STAR FORMING REGION Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 5 J0240-0828 GALAXY, DWARF COMPACT, RA=02H40M52.1900S +/- 0.1", J2000 Z = V = 18.93 u=20.3; FUV = 19.8 EMISSION LINE NEBULA, DEC=-08D28'27.41" +/- 0.1" 0.08223 STAR FORMING REGION Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 6 J2253+1116 GALAXY, DWARF COMPACT, RA=22H53M42.4087S +/- 0.2", J2000 Z = V = 16.87 u=17.9 EMISSION LINE NEBULA, DEC=+11D16'30.65" +/- 0.2" 0.007 STAR FORMING REGION Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 7 J0834+4343 GALAXY, DWARF COMPACT, RA=08H34M46.8020S +/- 0.2", J2000 Z = V = 19.62 u=20.31 EMISSION LINE NEBULA, DEC=+43D43'29.85" +/- 0.2" 0.027 STAR FORMING REGION Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 17791( 3) - 09-Jun-2026 15:07:00 - [ 4] Visit: 01 (J1205+4551) 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 J1205+4551 COS/NUV ACQ/IMA PSA MIRRORA 1 200 S (200 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1205+4551 COS/FUV TIME-TA PSA G160M 1611 BUFFER-TIME=1500, FP-POS=3 1 500 S G see below (712 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J1205+4551 COS/FUV TIME-TA PSA G160M 1611 BUFFER-TIME=1500, FP-POS=4 1 500 S G see below (712 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J1205+4551 COS/NUV TIME-TA PSA G185M 1864 FP-POS=ALL, BUFFER-TIME=2183 1 500 S G see below (2364 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1205+4551 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J1205+4551 2 COS/FUV TIME-TA PSA G160M 1611 none none none none 1 712.0 S G J1205+4551 3 COS/FUV TIME-TA PSA G160M 1611 none none none none 1 712.0 S G J1205+4551 4 COS/NUV TIME-TA PSA G185M 1864 none none none 1 2 591.0 S G J1205+4551 4 COS/NUV TIME-TA PSA G185M 1864 none none none 2 2 591.0 S G J1205+4551 4 COS/NUV TIME-TA PSA G185M 1864 none none none 3 2 591.0 S G J1205+4551 4 COS/NUV TIME-TA PSA G185M 1864 none none none 4 2 591.0 S G 17791( 3) - 09-Jun-2026 15:07:00 - [ 5] Visit: 02 (J1702+1803) 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 J1702+1803 COS/NUV ACQ/IMA PSA MIRRORA 1 54 S (54 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1702+1803 COS/FUV TIME-TA PSA G160M 1589 BUFFER-TIME=1455, FP-POS=2 1 500 S G see below (837 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J1702+1803 COS/FUV TIME-TA PSA G160M 1589 BUFFER-TIME=1455, FP-POS=3 1 500 S G see below (837 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J1702+1803 COS/FUV TIME-TA PSA G160M 1589 BUFFER-TIME=1455, FP-POS=4 1 500 S G see below (810 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 J1702+1803 COS/NUV TIME-TA PSA G185M 1817 FP-POS=2, BUFFER-TIME=1455 1 700 S G see below (1200 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 J1702+1803 COS/NUV TIME-TA PSA G185M 1817 FP-POS=3, BUFFER-TIME=1455 1 700 S G see below (1240 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 J1702+1803 COS/NUV TIME-TA PSA G185M 1817 FP-POS=4, BUFFER-TIME=1455 1 2 S G see below (1239 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1702+1803 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J1702+1803 2 COS/FUV TIME-TA PSA G160M 1589 none none none none 1 837.0 S G J1702+1803 3 COS/FUV TIME-TA PSA G160M 1589 none none none none 1 837.0 S G J1702+1803 4 COS/FUV TIME-TA PSA G160M 1589 none none none none 2 810.0 S G 17791( 3) - 09-Jun-2026 15:07:00 - [ 6] 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1702+1803 5 COS/NUV TIME-TA PSA G185M 1817 none none none none 2 1200.0 S G J1702+1803 6 COS/NUV TIME-TA PSA G185M 1817 none none none none 3 1240 S G J1702+1803 7 COS/NUV TIME-TA PSA G185M 1817 none none none none 3 1239.0 S G 17791( 3) - 09-Jun-2026 15:07:00 - [ 7] Visit: 03 (J1851+6934) 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 J1851+6934 COS/NUV ACQ/IMA PSA MIRRORA 1 76 S (76 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1851+6934 COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=1500, FP-POS=3 1 500 S G see below (877 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J1851+6934 COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=1500, FP-POS=4 1 500 S G see below (877 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J1851+6934 COS/NUV TIME-TA PSA G185M 1890 FP-POS=ALL, BUFFER-TIME=2183 1 500 S G see below (2452 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1851+6934 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J1851+6934 2 COS/FUV TIME-TA PSA G160M 1577 none none none none 1 877.0 S G J1851+6934 3 COS/FUV TIME-TA PSA G160M 1577 none none none none 1 877.0 S G J1851+6934 4 COS/NUV TIME-TA PSA G185M 1890 none none none 1 2 613.0 S G J1851+6934 4 COS/NUV TIME-TA PSA G185M 1890 none none none 2 2 613.0 S G J1851+6934 4 COS/NUV TIME-TA PSA G185M 1890 none none none 3 2 613.0 S G J1851+6934 4 COS/NUV TIME-TA PSA G185M 1890 none none none 4 2 613.0 S G 17791( 3) - 09-Jun-2026 15:07:00 - [ 8] Visit: 04 (J1111+5631) 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 J1111+5631 COS/NUV ACQ/IMA PSA MIRRORA 1 200 S (200 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1111+5631 COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=1500, FP-POS=3 1 500 S G see below (732 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J1111+5631 COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=1500, FP-POS=4 1 500 S G see below (732 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J1111+5631 COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=1500, FP-POS=ALL 1 500 S G see below (4520 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1111+5631 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J1111+5631 2 COS/FUV TIME-TA PSA G160M 1577 none none none none 1 732.0 S G J1111+5631 3 COS/FUV TIME-TA PSA G160M 1577 none none none none 1 732.0 S G J1111+5631 4 COS/FUV TIME-TA PSA G160M 1577 none none none 1 2 1130.0 S G J1111+5631 4 COS/FUV TIME-TA PSA G160M 1577 none none none 2 2 1130.0 S G J1111+5631 4 COS/FUV TIME-TA PSA G160M 1577 none none none 3 3 1130.0 S G J1111+5631 4 COS/FUV TIME-TA PSA G160M 1577 none none none 4 3 1130.0 S G 17791( 3) - 09-Jun-2026 15:07:00 - [ 9] Visit: 05 (J2040-0828) 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 J0240-0828 COS/NUV ACQ/IMA PSA MIRRORA 1 80 S (80 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J0240-0828 COS/NUV TIME-TA PSA G185M 1900 FP-POS=3, BUFFER-TIME=2183 1 500 S G see below (1015 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J0240-0828 COS/NUV TIME-TA PSA G185M 1900 FP-POS=4, BUFFER-TIME=2183 1 500 S G see below (1015 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J0240-0828 COS/NUV TIME-TA PSA G185M 1900 FP-POS=ALL, BUFFER-TIME=2183 1 500 S G see below (4972 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 | ------------------------------------------------------------------------------------------------------------------------------------ J0240-0828 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J0240-0828 2 COS/NUV TIME-TA PSA G185M 1900 none none none none 1 1015.0 S G J0240-0828 3 COS/NUV TIME-TA PSA G185M 1900 none none none none 1 1015.0 S G J0240-0828 4 COS/NUV TIME-TA PSA G185M 1900 none none none 1 2 1243.0 S G J0240-0828 4 COS/NUV TIME-TA PSA G185M 1900 none none none 2 2 1243.0 S G J0240-0828 4 COS/NUV TIME-TA PSA G185M 1900 none none none 3 3 1243.0 S G J0240-0828 4 COS/NUV TIME-TA PSA G185M 1900 none none none 4 3 1243.0 S G 17791( 3) - 09-Jun-2026 15:07:00 - [ 10] Visit: 06 (J2253+1116) 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 J2253+1116 COS/NUV ACQ/IMA PSA MIRRORA 1 68 S (68 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J2253+1116 COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=1500, FP-POS=2 1 500 S G see below (816 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J2253+1116 COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=1500, FP-POS=3 1 500 S G see below (817 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J2253+1116 COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=1500, FP-POS=4 1 500 S G see below (825 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 J2253+1116 COS/NUV TIME-TA PSA G185M 1864 FP-POS=3, BUFFER-TIME=2183 1 500 S G see below (542 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 J2253+1116 COS/NUV TIME-TA PSA G185M 1864 FP-POS=4, BUFFER-TIME=2183 1 500 S G see below (542 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 J2253+1116 COS/NUV TIME-TA PSA G185M 1864 FP-POS=ALL, BUFFER-TIME=2183 1 500 S G see below (2344 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 | ------------------------------------------------------------------------------------------------------------------------------------ J2253+1116 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J2253+1116 2 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 816.0 S G J2253+1116 3 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 817.0 S G J2253+1116 4 COS/FUV TIME-TA PSA G160M 1533 none none none none 2 825.0 S G 17791( 3) - 09-Jun-2026 15:07:00 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ J2253+1116 5 COS/NUV TIME-TA PSA G185M 1864 none none none none 2 542.0 S G J2253+1116 6 COS/NUV TIME-TA PSA G185M 1864 none none none none 2 542.0 S G J2253+1116 7 COS/NUV TIME-TA PSA G185M 1864 none none none 1 3 586.0 S G J2253+1116 7 COS/NUV TIME-TA PSA G185M 1864 none none none 2 3 586.0 S G J2253+1116 7 COS/NUV TIME-TA PSA G185M 1864 none none none 3 3 586.0 S G J2253+1116 7 COS/NUV TIME-TA PSA G185M 1864 none none none 4 3 586.0 S G 17791( 3) - 09-Jun-2026 15:07:00 - [ 12] Visit: 08 (J1111+5631) 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 J1111+5631 COS/NUV ACQ/IMA PSA MIRRORA 1 200 S (200 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1111+5631 COS/NUV TIME-TA PSA G185M 1864 FP-POS=3, BUFFER-TIME=2183 1 500 S G see below (944 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J1111+5631 COS/NUV TIME-TA PSA G185M 1864 FP-POS=4, BUFFER-TIME=2183 1 500 S G see below (945 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J1111+5631 COS/NUV TIME-TA PSA G185M 1864 FP-POS=ALL, BUFFER-TIME=2183 1 500 S G see below (5150 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1111+5631 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J1111+5631 2 COS/NUV TIME-TA PSA G185M 1864 none none none none 1 944.0 S G J1111+5631 3 COS/NUV TIME-TA PSA G185M 1864 none none none none 1 945.0 S G J1111+5631 4 COS/NUV TIME-TA PSA G185M 1864 none none none 1 2 1287 S G J1111+5631 4 COS/NUV TIME-TA PSA G185M 1864 none none none 2 2 1288 S G J1111+5631 4 COS/NUV TIME-TA PSA G185M 1864 none none none 3 3 1288 S G J1111+5631 4 COS/NUV TIME-TA PSA G185M 1864 none none none 4 3 1287 S G 17791( 3) - 09-Jun-2026 15:07:00 - [ 13] Visit: 09 (J2040-0828) 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 J0240-0828 COS/NUV ACQ/IMA PSA MIRRORA 1 80 S (80 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J0240-0828 COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=1500, FP-POS=ALL 1 500 S G see below (3774 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 | ------------------------------------------------------------------------------------------------------------------------------------ J0240-0828 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J0240-0828 2 COS/FUV TIME-TA PSA G160M 1533 none none none 1 1 802.0 S G J0240-0828 2 COS/FUV TIME-TA PSA G160M 1533 none none none 2 1 801.0 S G J0240-0828 2 COS/FUV TIME-TA PSA G160M 1533 none none none 3 2 1085.0 S G J0240-0828 2 COS/FUV TIME-TA PSA G160M 1533 none none none 4 2 1086.0 S G 17791( 3) - 09-Jun-2026 15:07:00 - [ 14] Visit: 10 (J0834+4343) 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 J0834+4343 COS/NUV ACQ/IMA PSA MIRRORA 1 200 S (200 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J0834+4343 COS/NUV TIME-TA PSA G185M 1900 FP-POS=3, BUFFER-TIME=2183 1 500 S G see below (915 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J0834+4343 COS/NUV TIME-TA PSA G185M 1900 FP-POS=4, BUFFER-TIME=2183 1 500 S G see below (915 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J0834+4343 COS/NUV TIME-TA PSA G185M 1900 FP-POS=ALL, BUFFER-TIME=2183 1 500 S G see below (5052 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 | ------------------------------------------------------------------------------------------------------------------------------------ J0834+4343 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J0834+4343 2 COS/NUV TIME-TA PSA G185M 1900 none none none none 1 915.0 S G J0834+4343 3 COS/NUV TIME-TA PSA G185M 1900 none none none none 1 915.0 S G J0834+4343 4 COS/NUV TIME-TA PSA G185M 1900 none none none 1 2 1263.0 S G J0834+4343 4 COS/NUV TIME-TA PSA G185M 1900 none none none 2 2 1263.0 S G J0834+4343 4 COS/NUV TIME-TA PSA G185M 1900 none none none 3 3 1263.0 S G J0834+4343 4 COS/NUV TIME-TA PSA G185M 1900 none none none 4 3 1263.0 S G 17791( 3) - 09-Jun-2026 15:07:00 - [ 15] Visit: 11 (J0834+4343) 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 J0834+4343 COS/NUV ACQ/IMA PSA MIRRORA 1 200 S (200 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J0834+4343 COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=1500, FP-POS=ALL 1 500 S G see below (3622 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 | ------------------------------------------------------------------------------------------------------------------------------------ J0834+4343 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J0834+4343 2 COS/FUV TIME-TA PSA G160M 1577 none none none 1 1 707.0 S G J0834+4343 2 COS/FUV TIME-TA PSA G160M 1577 none none none 2 1 706.0 S G J0834+4343 2 COS/FUV TIME-TA PSA G160M 1577 none none none 3 2 1104.0 S G J0834+4343 2 COS/FUV TIME-TA PSA G160M 1577 none none none 4 2 1105.0 S G 17791( 3) - 09-Jun-2026 15:07:00 - [ 16] Visit: 41 (J1205+4551) 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 J1205+4551 COS/NUV ACQ/IMA PSA MIRRORA 1 200 S (200 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1205+4551 COS/FUV TIME-TA PSA G160M 1611 BUFFER-TIME=1500, FP-POS=3 1 500 S G see below (687 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J1205+4551 COS/FUV TIME-TA PSA G160M 1611 BUFFER-TIME=1500, FP-POS=4 1 500 S G see below (687 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1205+4551 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J1205+4551 2 COS/FUV TIME-TA PSA G160M 1611 none none none none 1 687.0 S G J1205+4551 3 COS/FUV TIME-TA PSA G160M 1611 none none none none 1 687.0 S G 17791( 3) - 09-Jun-2026 15:07:00 - [ 17] Visit: 44 (J1111+5631) 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 J1111+5631 COS/NUV ACQ/IMA PSA MIRRORA 1 200 S (200 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J1111+5631 COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=1500, FP-POS=3 1 500 S G see below (705 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J1111+5631 COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=1500, FP-POS=4 1 500 S G see below (705 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J1111+5631 COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=1500, FP-POS=ALL 1 500 S G see below (4408 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1111+5631 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J1111+5631 2 COS/FUV TIME-TA PSA G160M 1577 none none none none 1 705.0 S G J1111+5631 3 COS/FUV TIME-TA PSA G160M 1577 none none none none 1 705.0 S G J1111+5631 4 COS/FUV TIME-TA PSA G160M 1577 none none none 1 2 1102.0 S G J1111+5631 4 COS/FUV TIME-TA PSA G160M 1577 none none none 2 2 1102.0 S G J1111+5631 4 COS/FUV TIME-TA PSA G160M 1577 none none none 3 3 1102.0 S G J1111+5631 4 COS/FUV TIME-TA PSA G160M 1577 none none none 4 3 1102.0 S G 17791( 3) - 09-Jun-2026 15:07:00 - [ 18] Summary Form for Proposal 17791 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=1455, BUFFER-TIME=1500, BUFFER-TIME=2183, FP-POS=2, FP-POS=3, FP-POS=4, FP-POS=ALL ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G160M, G185M, MIRRORA ------------------------------------------------------------------------------------------------------------------------------------ Target Names J0240-0828, J0834+4343, J1111+5631, J1205+4551, J1702+1803, J1851+6934, J2253+1116 ------------------------------------------------------------------------------------------------------------------------------------