17786( 4) - 20-Jun-2025 16:18:11 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17786 Version: 4 Check-in Time: 20-Jun-2025 16:18:11 STScI Edit Number: 1 Title Tracing the beginnings, endings, and rarity of Blue Ring Nebulae to a rare stage in post-stellar merger evolution ------------------------------------------------------------------------------------ Type Cycle GO 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Keri Hoadley University of Florida Y CoI: Dr. Nicole Arulanantham Schmidt Sciences N CoI: Prof. Kevin France University of Colorado at Boulder N CoI: Dr. Christopher Martin California Institute of Technology N CoI: Prof. Casey DeRoo University of Iowa N CoI: Dr. Hans Moritz Guenther Massachusetts Institute of Technology N CoI: Dr. Christian Schneider Universitat Hamburg N CoI: Dr. Ken Shen University of California - Berkeley N CoI: Prof. Brian Metzger Columbia University in the City of New N York ------------------------------------------------------------------------------------ Abstract We catch stellar mergers in the act as luminous red novae (LRNe), peaking several orders of magnitude at optical wavelengths, then decaying exponentially and reddening. LRNe are incredibly difficult to study immediately afterwards. Outflows launched by a merger expand quickly and cool rapidly, forming obstructing dust and molecules that block our view just days-weeks afterwards. Even suspected ancient mergers, like CK Vul, are still embedded in dusty envelopes. We have no observational evidence for what happens to stars after they merge. What do systems look like after merging? What are the long-term ramifications of stellar mergers? The Blue Ring Nebula (BRN) is a rare example of an outflow, produced by a thousands of years old stellar merger, that has virtually no obstructing dust in it, thus revealing the star that created it, TYC 2597-735-1 (TYC). We propose to use HST-COS G130M and G160M spectra to characterize the BRN by observing a fortuitously-positioned background galaxy to probe it using absorption line spectroscopy. Far-UV observations are exclusively able to cover molecules, neutral, and ionized gas at a wide range of temperatures. Absorption line depths are sensitive to how much matter is in the sightline, so H2, HI, and residual gas in the BRN will stick out against the continuum source. The BRN is quickly expanding towards us, so lines traditionally washed out by airglow or interstellar absorption (e.g., HI) will be velocity-shifted away from these contaminants. This powerful technique will uncover the composition, density, temperature, and motions of the BRN gas, answering key points about its origins, its lifetime, and the number of BRNs we might see. ------------------------------------------------------------------------------------ Observations Description ------------------------ Program Overview: This Cycle 32 GO program requests 22 orbits in total, split between COS G130M/1291 and G160M/1533 (11 orbits in each mode), to observe the properties of neutral hydrogen (HI, H2) and reveal hidden residual species in 17786( 4) - 20-Jun-2025 16:18:11 - [ 2] the Blue Ring Nebula (BRN) using absorption line spectroscopy: - COS G130M (1291) accesses both HI and cool/warm phases of H2 through the BRN; - COS G160M (1533) accesses the warm/non-thermal populations of H2$ in the nebula. Both G130M and G160M modes access many strong features of neutral and ionic C, N, Si, O, He, and other species that may be too sparse to show up in emission. These COS grating positions provide sufficient far-UV spectral coverage of HI-LyA in absorption (which is expected to be blue-shifted by >= 400 km/s from line center, avoiding geo-coronal emission and interstellar HI absorption, which is estimated to be ~10E20 cm-2, based on IRSA extinction maps) and numerous absorption bands of H2. Access to H2 absorption signatures depends strongly on the thermal temperature and non-thermal populations of the molecules in the BRN (H2 Lyman-Werner electronic transitions: 1120 - 1700 \AA). This information is currently unknown, so even a non-detection at our requested signal-to-noise (SN) places important constraints on the properties of the remaining molecular reservoir of the BRN and its properties. The COS G130M and G160M modes are sensitive enough to probe all the above features within our observing plan while achieving spectral resolutions (R ~ 17, 000) necessary to sufficiently model the kinematics, density, and temperature of the nebular gas. The galaxy SDSSCGB 73656.1 is the only FUV-bright source found behind the BRN, with a measured FUV flux = 19.6 mag (GALEX), making this absorption line study possible. SDSSCGB 73656.1 is redshifted slightly (z=0.0818), and its UV continuum is expected to peak in the FUV range covered by our COS observations. Any galactic absorption features will be redshifted from their rest frame wavelengths and treated as contamination in our analysis. We will avoid spectral regions around suspected contamination lines. At the Galactic latitude of the BRN (+35 degrees), the HST viewing window is expected to be 55 minutes. Assuming 2550 seconds of science exposure per orbit, this allows for 740 seconds of slew and settle time. Each observing mode allows adequate time for guide star acquisition (using ACQ/SEARCH PSA), instrument acquisition, a single peak up, and a buffer dump prior to the science exposure. There are a number of guide stars choices in the field of SDSSCGB 73656.1 that prove adequate for acquisition (e.g., TYC 2597-735-1: V = 11.1 mag). COS Instrument Safety: We do not expect any bright features to show up in either G130M or G160M. The BRN itself, in emission, is very faint (F(FUV) ~ 8E-18 ergs/cm2/s/arcsec2). The galaxy continuum is expected to be the brightest astrophysical source, and will not peak more than ~ 1E-13 ergs/cm2/s. This results in ~$0.002 counts/second in the brightest pixel. Geocoronal LyA will be the brightest feature in G130M, at 0.095 counts/second in the brightest pixel (according to the COS ETC). In G160M, the brightest pixel will be the continuum of SDSSCGB 73656.1 at the most efficient part of the spectrum, which results in a max count rate of 2.260e-04 counts/second in the brightest pixel (verified with COS ETC). Since the count rate limit of the COS FUV XDL detector is ~ 0.67 counts/second/pixel for both modes, all fluxes are well within COS observing capabilities. ------------------------------------------------------------------------------------ 17786( 4) - 20-Jun-2025 16:18:11 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSSCGB-7365 GALAXY, UNDESIGNATED RA=16H48M35.4300S +/- 0.088", J2000 Z = V = 17.8 +/- 0.2 GALEX FUV (AB): 19.6 6.1 DEC=+35D09'39.28" +/- 0.04" 0.0818 +/-0.05, GALEX NUV (AB): 19.6 +/- 0.03, u(AB): 19.180 +/- 0.075, g(AB): 18.024 +/- 0.010, r(AB) 17.601 +/- 0.010, E(B-V) = 0.016 Reference Frame: ICRS Extended: YES Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 17786( 4) - 20-Jun-2025 16:18:11 - [ 4] Visit: 01 (COS G130M 1291 Visit 1) Visit Requirements: On Hold Comments: Additional Comments: Orbits 1-3 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 SDSSCGB-736 COS/NUV ACQ/IMA PSA MIRRORB 1 120 S (120 56.1 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSCGB-736 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=5005 1 2106 S 56.1 G (2106 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SDSSCGB-736 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=5005 1 2595 S 56.1 G (2595 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SDSSCGB-736 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=5005 1 2595 S 56.1 G (2595 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSCGB-73656.1 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE SDSSCGB-73656.1 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G SDSSCGB-73656.1 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A G SDSSCGB-73656.1 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 N/A G 17786( 4) - 20-Jun-2025 16:18:11 - [ 5] Visit: 02 (COS G130M 1291 Visit 2) Visit Requirements: On Hold Comments: Additional Comments: Orbits 4-6 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 SDSSCGB-736 COS/NUV ACQ/IMA PSA MIRRORB 1 120 S (120 56.1 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSCGB-736 COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=5005 1 2106 S 56.1 G (2106 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SDSSCGB-736 COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=5005 1 2595 S 56.1 G (2595 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SDSSCGB-736 COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=5005 1 2595 S 56.1 G (2595 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSCGB-73656.1 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE SDSSCGB-73656.1 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G SDSSCGB-73656.1 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A G SDSSCGB-73656.1 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 N/A G 17786( 4) - 20-Jun-2025 16:18:11 - [ 6] Visit: 03 (COS G130M 1291 Visit 3) Visit Requirements: On Hold Comments: Additional Comments: Orbits 7-9 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 SDSSCGB-736 COS/NUV ACQ/IMA PSA MIRRORB 1 120 S (120 56.1 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSCGB-736 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=5005 1 2106 S 56.1 G (2106 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SDSSCGB-736 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=5005 1 2595 S 56.1 G (2595 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SDSSCGB-736 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=5005 1 2595 S 56.1 G (2595 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSCGB-73656.1 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE SDSSCGB-73656.1 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G SDSSCGB-73656.1 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A G SDSSCGB-73656.1 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 N/A G 17786( 4) - 20-Jun-2025 16:18:11 - [ 7] Visit: 04 (COS G130M 1291 Visit 4) Visit Requirements: On Hold Comments: Additional Comments: Orbits 10-11 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 SDSSCGB-736 COS/NUV ACQ/IMA PSA MIRRORB 1 120 S (120 56.1 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSCGB-736 COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=5005 1 2106 S 56.1 G (2106 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SDSSCGB-736 COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=5005 1 2595 S 56.1 G (2595 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSCGB-73656.1 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE SDSSCGB-73656.1 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G SDSSCGB-73656.1 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A G 17786( 4) - 20-Jun-2025 16:18:11 - [ 8] Visit: 05 (COS G160M 1533 Visit 1) Visit Requirements: On Hold Comments: Additional Comments: Orbits 1-3 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 SDSSCGB-736 COS/NUV ACQ/IMA PSA MIRRORB 1 120 S (120 56.1 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSCGB-736 COS/FUV TIME-TA PSA G160M 1533 FP-POS=1, BUFFER-TIME=11400 1 1933 S 56.1 G (1933 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SDSSCGB-736 COS/FUV TIME-TA PSA G160M 1533 FP-POS=1, BUFFER-TIME=11400 1 2599 S 56.1 G (2599 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SDSSCGB-736 COS/FUV TIME-TA PSA G160M 1533 FP-POS=1, BUFFER-TIME=11400 1 2599 S 56.1 G (2599 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSCGB-73656.1 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE SDSSCGB-73656.1 2 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 N/A G SDSSCGB-73656.1 3 COS/FUV TIME-TA PSA G160M 1533 none none none none 2 N/A G SDSSCGB-73656.1 4 COS/FUV TIME-TA PSA G160M 1533 none none none none 3 N/A G 17786( 4) - 20-Jun-2025 16:18:11 - [ 9] Visit: 06 (COS G160M 1533 Visit 2) Visit Requirements: On Hold Comments: Additional Comments: Orbits 4-6 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 SDSSCGB-736 COS/NUV ACQ/IMA PSA MIRRORB 1 120 S (120 56.1 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSCGB-736 COS/FUV TIME-TA PSA G160M 1533 FP-POS=2, BUFFER-TIME=11400 1 1933 S 56.1 G (1933 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SDSSCGB-736 COS/FUV TIME-TA PSA G160M 1533 FP-POS=2, BUFFER-TIME=11400 1 2599 S 56.1 G (2599 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SDSSCGB-736 COS/FUV TIME-TA PSA G160M 1533 FP-POS=2, BUFFER-TIME=11400 1 2599 S 56.1 G (2599 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSCGB-73656.1 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE SDSSCGB-73656.1 2 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 N/A G SDSSCGB-73656.1 3 COS/FUV TIME-TA PSA G160M 1533 none none none none 2 N/A G SDSSCGB-73656.1 4 COS/FUV TIME-TA PSA G160M 1533 none none none none 3 N/A G 17786( 4) - 20-Jun-2025 16:18:11 - [ 10] Visit: 07 (COS G160M 1533 Visit 3) Visit Requirements: On Hold Comments: Additional Comments: Orbits 7-9 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 SDSSCGB-736 COS/NUV ACQ/IMA PSA MIRRORB 1 120 S (120 56.1 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSCGB-736 COS/FUV TIME-TA PSA G160M 1533 FP-POS=3, BUFFER-TIME=11400 1 1933 S 56.1 G (1933 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SDSSCGB-736 COS/FUV TIME-TA PSA G160M 1533 FP-POS=3, BUFFER-TIME=11400 1 2599 S 56.1 G (2599 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SDSSCGB-736 COS/FUV TIME-TA PSA G160M 1533 FP-POS=3, BUFFER-TIME=11400 1 2599 S 56.1 G (2599 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSCGB-73656.1 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE SDSSCGB-73656.1 2 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 N/A G SDSSCGB-73656.1 3 COS/FUV TIME-TA PSA G160M 1533 none none none none 2 N/A G SDSSCGB-73656.1 4 COS/FUV TIME-TA PSA G160M 1533 none none none none 3 N/A G 17786( 4) - 20-Jun-2025 16:18:11 - [ 11] Visit: 08 (COS G160M 1533 Visit 4) Visit Requirements: On Hold Comments: Additional Comments: Orbits 10-11 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 SDSSCGB-736 COS/NUV ACQ/IMA PSA MIRRORB 1 120 S (120 56.1 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSCGB-736 COS/FUV TIME-TA PSA G160M 1533 FP-POS=4, BUFFER-TIME=11400 1 1933 S 56.1 G (1933 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SDSSCGB-736 COS/FUV TIME-TA PSA G160M 1533 FP-POS=4, BUFFER-TIME=11400 1 2599 S 56.1 G (2599 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSCGB-73656.1 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE SDSSCGB-73656.1 2 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 N/A G SDSSCGB-73656.1 3 COS/FUV TIME-TA PSA G160M 1533 none none none none 2 N/A G 17786( 4) - 20-Jun-2025 16:18:11 - [ 12] Visit: 51 (COS G130M 1291 Visit 1) Visit Requirements: On Hold Comments: Additional Comments: Orbits 1-3 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 SDSSCGB-736 COS/NUV ACQ/IMA PSA MIRRORB 1 120 S (120 56.1 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSCGB-736 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=5005 1 2106 S 56.1 G (2106 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SDSSCGB-736 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=5005 1 2595 S 56.1 G (2595 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SDSSCGB-736 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=5005 1 2595 S 56.1 G (2595 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSCGB-73656.1 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE SDSSCGB-73656.1 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G SDSSCGB-73656.1 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A G SDSSCGB-73656.1 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 N/A G 17786( 4) - 20-Jun-2025 16:18:11 - [ 13] Summary Form for Proposal 17786 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=11400, BUFFER-TIME=5005, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, G160M, MIRRORB ------------------------------------------------------------------------------------------------------------------------------------ Target Names SDSSCGB-73656.1 ------------------------------------------------------------------------------------------------------------------------------------