17803( 6) - 25-Sep-2025 21:46:46 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17803 Version: 6 Check-in Time: 25-Sep-2025 21:46:46 STScI Edit Number: 3 Title The first multi-phase survey of the circumgalactic medium of quasar hosts at z<1 ------------------------------------------------------------------------------------ Type Cycle GO 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Sean Johnson University of Michigan Y CoI: Prof. Hsiao-Wen Chen University of Chicago N CoI: Prof. Jenny Emma Greene Princeton University N CoI: Dr. John S. Mulchaey Carnegie Institution of Washington N CoI: Prof. Joop Schaye Universiteit Leiden N CoI: Prof. Fakhri S Zahedy University of North Texas N CoI: Dr. Gregory Walth California Institute of Technology N CoI: Dr. Gwen C. Rudie Carnegie Institution of Washington N CoI: Dr. Erin Boettcher University of Maryland N CoI: Dr. Benjamin Weiner University of Arizona N CoI: Dr. Jennifer I. Li University of Illinois at Urbana - N Champaign CoI: Will Liu University of Michigan N CoI: Dr. Zhijie Qu Tsinghua University N CoI: Mr. Nishant Mishra University of Michigan N ------------------------------------------------------------------------------------ Abstract Feedback from quasars plays a vital role in galaxy evolution, but the relationship between quasars and the circumgalactic medium (CGM) that dominates baryon reservoirs and provides a record of feedback is not well constrained. The cool CGM of quasar hosts observed on 100 kpc scales is strongly correlated with the quasar luminosity and exceeds that of non-AGN galaxies by 2x, even though BH accretion occurs at <1 pc. These observations provide evidence for a connection between AGN activity and the CGM despite the large difference in scale. The observed CGM-quasar connection can result from (1) winds associated with quasar feedback or (2) debris from interactions thought to trigger luminous quasars. If the correlation is due to feedback, the observed low-ionization gas results from entrainment or cooling in a hot wind, predicting significant highly ionized absorption and high metallicity. Lower ionization species will dominate if the correlation is driven by debris from interactions. We propose testing these possibilities through a multi-phase study of the CGM of the only nine quasars at z<1 with NUV-bright background probes at d<160 kpc. The proposed UV spectra will cover the HI Lyman series and a suite of low-to-high ions including CII, CIII, and OVI to enable: (1) accurate measurements of N(HI) and metallicities, (2) comparison of the kinematics of gas in different ionization states, and (3) a multi-phase CGM comparison of the eight quasars with inactive galaxies in the literature. The proposed UV spectra will test the quasar feeding vs. feedback scenarios through ionization analysis and kinematic comparison with nearby galaxies revealed in ongoing ground-based surveys. ------------------------------------------------------------------------------------ Observations Description ------------------------ 17803( 6) - 25-Sep-2025 21:46:46 - [ 2] This program will observe COS FUV spectra with the PSA in medium-resolution mode of background quasars probing the CGM of foreground quasars. The foreground quasars range in redshift between z=0.29 and z=0.7, placing the absorption features of interest (the HI Lyman series, CIII, and OVI, for example) in different parts of the FUV spectral coverage. This requires observations of G130M and/or G160M and associated cenwave settings that are customized for each quasar. The details of the spectroscopic disperser and cenwave choice for each system are given in the comments associated with the visits. In some cases, no features fall in segment gaps, so we observe fewer cenwave settings to minimize overheads without loss of scientific return on the CGM absorption spectra at the redshift of the foreground quasar. In other cases, the observations include multiple cenwave settings to fill the segment gap or cover features near the edges of the G130M or G160M coverage. To ensure spectral quality in the coadded COS spectra, we observe multiple FP-POS settings. We note that the S/N requirement for the proposed Lya observations (when needed) are significantly lower than the metal ions and rest of the HI Lyman series because the Lya observations are only designed to constrain the presence or absence of damping wings, which will be performed on heavily rebinned spectra. Acquisition: All targets are detected in GAIA and, therefore, have highly accurate coordinates. Moreover, all are detected in GALEX, ensuring good UV brightness constraints. As a result, we use the ACQ/IMAGE acquisition mode which provides good centering of the quasars in the science aperture with minimal overheads. We use Mirror A whenever possible, but use Mirror B when required for brighter sources. Visit strategy: To minimize overheads while maintaining schedulability, we pack visits with 2-4 orbits each. The UV bright quasars are not expected to be extended in the FUV channel and a search of the GAIA archive reveals that none have nearby sources that would fall within the 2.5" PSA and contaminate the COS spectrum. We therefore do not set the EXTENDED flag for the sources. ------------------------------------------------------------------------------------ 17803( 6) - 25-Sep-2025 21:46:46 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 J143624.30+3 GALAXY, QSO RA=14H36M24.2980S +/- 0.01", J2000 V = 18.6 NUV=18.9 53709.4 DEC=+35D37'9.43" +/- 0.01" Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 2 J084331.84+1 GALAXY, QSO RA=08H43M31.8420S +/- 0.01", J2000 V = 17.0 NUV=17.7 11235.3 DEC=+11D12'35.29" +/- 0.01" Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 3 J152122.42+0 GALAXY, QSO RA=15H21M22.4160S +/- 0.01", J2000 V = 18.5 NUV=18.7 92650.8 DEC=+09D26'50.79" +/- 0.01" Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 4 J015101.85+0 GALAXY, QSO RA=01H51M1.8460S +/- 0.01", J2000 V = 18.5 NUV=19.0 05631.7 DEC=+00D56'31.66" +/- 0.01" Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 5 J131939.28+5 GALAXY, QSO RA=13H19M39.2830S +/- 0.01", J2000 V = 18.5 NUV=17.7 21849.2 DEC=+52D18'49.24" +/- 0.01" Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 6 J010506.03-2 GALAXY, QSO RA=01H05M6.0310S +/- 0.01", J2000 V = 18.0 NUV=18.8 95556.4 DEC=-29D55'56.44" +/- 0.01" Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 7 J010534.73-2 GALAXY, QSO RA=01H05M34.7270S +/- 0.01", J2000 V = 17.5 NUV=18.8 73657.9 DEC=-27D36'57.92" +/- 0.01" Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 8 J145420.00+1 GALAXY, QSO RA=14H54M19.9950S +/- 0.01", J2000 V = 18.5 NUV=18.5 92629.4 DEC=+19D26'29.38" +/- 0.01" Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 9 J101642.56+0 GALAXY, QSO RA=10H16M42.5570S +/- 0.01", J2000 V = 18.3 NUV=18.8 81835.9 DEC=+08D18'35.95" +/- 0.01" Reference Frame: ICRS Extended: NO ------------------------------------------------------------------------------------------------------------------------------------ 17803( 6) - 25-Sep-2025 21:46:46 - [ 4] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: 3 orbit G130M visit for background quasar J143624.3+353709.4 at redshift z=0.767 probing the CGM of a quasar at z=0.3916. At the redshift of the foreground quasar, covering all the features of interest requires observations in both the 1222 and 1291 cenwave settings. For both cenwaves, the visit includes all available FP-POS settings (3 & 4 for 1291 and 1-4 for 1222). This visit will complete G130M observations for J143624.3+353709.4. 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 J143624.30+ COS/NUV ACQ/IMA PSA MIRRORA 1 5.0 S (5 353709.4 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J143624.30+ COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=4922 1 2330 S 353709.4 G (2330 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J143624.30+ COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=4922 1 2330 S 353709.4 G see below (2564 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J143624.30+ COS/FUV TIME-TA PSA G130M 1222 FP-POS=ALL, BUFFER-TIME=10431 1 500 S 353709.4 G see below (2280 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 | ------------------------------------------------------------------------------------------------------------------------------------ J143624.30+353709.4 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J143624.30+353709.4 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G J143624.30+353709.4 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 2564.0 S G J143624.30+353709.4 4 COS/FUV TIME-TA PSA G130M 1222 none none none 1 3 570.0 S G J143624.30+353709.4 4 COS/FUV TIME-TA PSA G130M 1222 none none none 2 3 570.0 S G J143624.30+353709.4 4 COS/FUV TIME-TA PSA G130M 1222 none none none 3 3 570.0 S G J143624.30+353709.4 4 COS/FUV TIME-TA PSA G130M 1222 none none none 4 3 570.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 5] Visit: 02 Visit Requirements: On Hold Comments: Additional Comments: 3 orbit G160M visit for background quasar J143624.3+353709.4 at redshift z=0.767 probing the CGM of a quasar at z=0.3916. At the foreground quasar redshift, all features of interest are covered by the G160M 1533 cenwave so we limit observations to this cenwave and the visit includes all four FP-POS settings available for it. This will leave a small gap between the detectors from 1515-1533 Angstroms, but no features at z=0.3916 fall in this range. This visit will complete G160M observations for J143624.3+353709.4. 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 J143624.30+ COS/NUV ACQ/IMA PSA MIRRORA 1 5.0 S (5 353709.4 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J143624.30+ COS/FUV TIME-TA PSA G160M 1533 FP-POS=1, BUFFER-TIME=11552 1 2000 S 353709.4 G see below (2163 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J143624.30+ COS/FUV TIME-TA PSA G160M 1533 FP-POS=2, BUFFER-TIME=11812 1 2000 S 353709.4 G see below (2599 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J143624.30+ COS/FUV TIME-TA PSA G160M 1533 FP-POS=3, BUFFER-TIME=11812 1 600 S 353709.4 G see below (1128 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 J143624.30+ COS/FUV TIME-TA PSA G160M 1533 FP-POS=4, BUFFER-TIME=11812 1 600 S 353709.4 G see below (1128 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 | ------------------------------------------------------------------------------------------------------------------------------------ J143624.30+353709.4 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J143624.30+353709.4 2 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 2163.0 S G J143624.30+353709.4 3 COS/FUV TIME-TA PSA G160M 1533 none none none none 2 2599.0 S G J143624.30+353709.4 4 COS/FUV TIME-TA PSA G160M 1533 none none none none 3 1128.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ J143624.30+353709.4 5 COS/FUV TIME-TA PSA G160M 1533 none none none none 3 1128.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 7] Visit: 03 Visit Requirements: On Hold Comments: Additional Comments: 3 orbit G160M visit for J084331.84+111235.3, a z=1.0276 quasar probing the CGM of a foreground quasar at z=0.7075. At this redshift, all key features are covered by G160M. This visit constitutes half of the G160M orbits for J084331.84+111235.3 and will be devoted to teh 1600 cenwave setting, observed in FP-POS=1-4. 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 J084331.84+ COS/NUV ACQ/IMA PSA MIRRORB 1 34 S (34 111235.3 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J084331.84+ COS/FUV TIME-TA PSA G160M 1600 FP-POS=1, BUFFER-TIME=10836 1 2000 S 111235.3 G see below (2094 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J084331.84+ COS/FUV TIME-TA PSA G160M 1600 FP-POS=2, BUFFER-TIME=10836 1 2000 S 111235.3 G see below (2575 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J084331.84+ COS/FUV TIME-TA PSA G160M 1600 FP-POS=3, BUFFER-TIME=10836 1 1000 S 111235.3 G see below (1116 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 J084331.84+ COS/FUV TIME-TA PSA G160M 1600 FP-POS=4, BUFFER-TIME=10836 1 1000 S 111235.3 G see below (1116 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 | ------------------------------------------------------------------------------------------------------------------------------------ J084331.84+111235.3 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE J084331.84+111235.3 2 COS/FUV TIME-TA PSA G160M 1600 none none none none 1 2094.0 S G J084331.84+111235.3 3 COS/FUV TIME-TA PSA G160M 1600 none none none none 2 2575.0 S G J084331.84+111235.3 4 COS/FUV TIME-TA PSA G160M 1600 none none none none 3 1116.0 S G J084331.84+111235.3 5 COS/FUV TIME-TA PSA G160M 1600 none none none none 3 1116.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 8] Visit: 04 Visit Requirements: On Hold Comments: Additional Comments: 3 orbit G160M visit for J084331.84+111235.3, a z=1.0276 quasar probing the CGM of a foreground quasar at z=0.7075. At this redshift, all key features are covered by G160M. This visit constitutes half of the G160M orbits for J084331.84+111235.3 and will be devoted to teh 1623 cenwave setting, observed in FP-POS=1-4. 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 J084331.84+ COS/NUV ACQ/IMA PSA MIRRORB 1 34 S (34 111235.3 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J084331.84+ COS/FUV TIME-TA PSA G160M 1623 FP-POS=1, BUFFER-TIME=10836 1 2000 S 111235.3 G see below (2087 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J084331.84+ COS/FUV TIME-TA PSA G160M 1623 FP-POS=2, BUFFER-TIME=10836 1 2000 S 111235.3 G see below (2575 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J084331.84+ COS/FUV TIME-TA PSA G160M 1623 FP-POS=3, BUFFER-TIME=10836 1 600 S 111235.3 G see below (1116 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 J084331.84+ COS/FUV TIME-TA PSA G160M 1623 FP-POS=4, BUFFER-TIME=10836 1 600 S 111235.3 G see below (1116 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 | ------------------------------------------------------------------------------------------------------------------------------------ J084331.84+111235.3 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE J084331.84+111235.3 2 COS/FUV TIME-TA PSA G160M 1623 none none none none 1 2087.0 S G J084331.84+111235.3 3 COS/FUV TIME-TA PSA G160M 1623 none none none none 2 2575.0 S G J084331.84+111235.3 4 COS/FUV TIME-TA PSA G160M 1623 none none none none 3 1116.0 S G J084331.84+111235.3 5 COS/FUV TIME-TA PSA G160M 1623 none none none none 3 1116.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 9] Visit: 05 Visit Requirements: On Hold Comments: Additional Comments: G130M visit for J152122.42+092650.9, a background quasar at z=0.749 probing the CGM of a foreground quasar at z=0.3199. At this redshift, all key features except for HI Lya are in the G130M coverage. This visit represents 3/4 of the G130M orbits. 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 J152122.42+ COS/NUV ACQ/IMA PSA MIRRORA 1 5 S (5 S) 092650.8 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J152122.42+ COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=10265, FP-POS=1 1 1000 S 092650.8 G see below (1094 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J152122.42+ COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=10265, FP-POS=2 1 1000 S 092650.8 G see below (1094 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J152122.42+ COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=10265, FP-POS=3 1 1000 S 092650.8 G see below (1225 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 J152122.42+ COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=10265, FP-POS=4 1 1000 S 092650.8 G see below (1225 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 J152122.42+ COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=10265, FP-POS=3 1 2000 S 092650.8 G see below (2535 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 | ------------------------------------------------------------------------------------------------------------------------------------ J152122.42+092650.8 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J152122.42+092650.8 2 COS/FUV TIME-TA PSA G130M 1222 none none none none 1 1094.0 S G J152122.42+092650.8 3 COS/FUV TIME-TA PSA G130M 1222 none none none none 1 1094.0 S G J152122.42+092650.8 4 COS/FUV TIME-TA PSA G130M 1222 none none none none 2 1225.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 10] 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 | ------------------------------------------------------------------------------------------------------------------------------------ J152122.42+092650.8 5 COS/FUV TIME-TA PSA G130M 1222 none none none none 2 1225.0 S G J152122.42+092650.8 6 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 2535.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 11] Visit: 06 Visit Requirements: On Hold Comments: Additional Comments: G130M and G160M visit for J152122.42+092650.9, a background quasar at z=0.749 probing the CGM of a foreground quasar at z=0.3199. At this redshift, key features in the G130M spectral coverage covers all desired features except for Lya. Because the S/N requirement for Lya is low (SNR=3 per resolution element) given that the goal is only to detect broad wings if they are present, we only observe one G160M cenwave with one FP-POS setting. This visit completes G130M with one orbit and contains both G160M orbits for this target. 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 J152122.42+ COS/NUV ACQ/IMA PSA MIRRORA 1 5 S (5 S) 092650.8 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J152122.42+ COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=10265, FP-POS=3 1 2000 S 092650.8 G see below (2307 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J152122.42+ COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=11393, FP-POS=4 1 2000 S 092650.8 G see below (2546 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J152122.42+ COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=11393, FP-POS=1 1 1000 S 092650.8 G see below (1114 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 J152122.42+ COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=11393, FP-POS=4 1 1000 S 092650.8 G see below (1114 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 | ------------------------------------------------------------------------------------------------------------------------------------ J152122.42+092650.8 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J152122.42+092650.8 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 2307.0 S G J152122.42+092650.8 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 2546.0 S G J152122.42+092650.8 4 COS/FUV TIME-TA PSA G160M 1577 none none none none 3 1114.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 12] 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 | ------------------------------------------------------------------------------------------------------------------------------------ J152122.42+092650.8 5 COS/FUV TIME-TA PSA G160M 1577 none none none none 3 1114.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 13] Visit: 07 Visit Requirements: On Hold Comments: Additional Comments: G130M visit for background quasar J015101.85+005631.7 which is at z=0.9849 and probes the CGM of a foreground quasar at z=0.492. At the redshift of the foreground quasar, all absorption lines of interest fall in the coverage of G160M with the Lyman limit at 1360 Ang and OVI at 1548 Ang. Cenwaves 1533 and 1577 fully cover the desired features. This visit includes half of the G160M exposures for this target. 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 J015101.85+ COS/NUV ACQ/IMA PSA MIRRORA 1 9 S (9 S) 005631.7 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J015101.85+ COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11124, FP-POS=1 1 2100 S 005631.7 G see below (2121 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J015101.85+ COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11124, FP-POS=2 1 2100 S 005631.7 G see below (2565 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J015101.85+ COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11124, FP-POS=3 1 2100 S 005631.7 G see below (2565 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 | ------------------------------------------------------------------------------------------------------------------------------------ J015101.85+005631.7 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J015101.85+005631.7 2 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 2121.0 S G J015101.85+005631.7 3 COS/FUV TIME-TA PSA G160M 1533 none none none none 2 2565.0 S G J015101.85+005631.7 4 COS/FUV TIME-TA PSA G160M 1533 none none none none 3 2565.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 14] Visit: 08 Visit Requirements: On Hold Comments: Additional Comments: Visit for J131939.28+521849.2, at z=1.2681 quasar probing the CGM of a foreground quasar at z=0.354. At this redshift, key features of interest fall in both the G130M spectral coverage except for Lya which is in G160M. The Lya observations are only intended to detect damping wings and so require only low S/N of ~3. per resolution element We will therefore conduct with G160M observations with only one cenwave and FP-POS setting. 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 J131939.28+ COS/NUV ACQ/IMA PSA MIRRORB 1 25 S (25 521849.2 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J131939.28+ COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=7595, FP-POS=ALL 1 500 S 521849.2 G (2000 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J131939.28+ COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=4108, FP-POS=3 1 1500 S 521849.2 G see below (2603 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J131939.28+ COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=4108, FP-POS=4 1 1500 S 521849.2 G see below (2614 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 J131939.28+ COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=8982, FP-POS=1 1 1100 S 521849.2 G see below (1143 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 J131939.28+ COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=8982, FP-POS=4 1 1100 S 521849.2 G see below (1143 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 | ------------------------------------------------------------------------------------------------------------------------------------ J131939.28+521849.2 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE J131939.28+521849.2 2 COS/FUV TIME-TA PSA G130M 1222 none none none 1 1 N/A G J131939.28+521849.2 2 COS/FUV TIME-TA PSA G130M 1222 none none none 2 1 N/A G J131939.28+521849.2 2 COS/FUV TIME-TA PSA G130M 1222 none none none 3 1 N/A G J131939.28+521849.2 2 COS/FUV TIME-TA PSA G130M 1222 none none none 4 1 N/A G 17803( 6) - 25-Sep-2025 21:46:46 - [ 15] 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 | ------------------------------------------------------------------------------------------------------------------------------------ J131939.28+521849.2 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 2603.0 S G J131939.28+521849.2 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 2614.0 S G J131939.28+521849.2 5 COS/FUV TIME-TA PSA G160M 1533 none none none none 4 1143.0 S G J131939.28+521849.2 6 COS/FUV TIME-TA PSA G160M 1533 none none none none 4 1143.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 16] Visit: 09 Visit Requirements: On Hold Comments: Additional Comments: G130M observations of J101642.56+081835.9, at z=0.587 quasar that probes the CGM of a foreground quasar at z=0.292. At this redshift, the absorption features of interest in G130M include the Lyman limit (1177 Ang), C III (1262 Ang), OVI (1340 Ang) 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 J101642.56+ COS/NUV ACQ/IMA PSA MIRRORA 1 5 S (5 S) 081835.9 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J101642.56+ COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=10245, FP-POS=ALL 1 450 S 081835.9 G see below (1944 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J101642.56+ COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=4879, FP-POS=3 1 2000 S 081835.9 G see below (2566 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J101642.56+ COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=4879, FP-POS=3 1 2000 S 081835.9 G see below (2566 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 J101642.56+ COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=4879, FP-POS=4 1 2000 S 081835.9 G see below (2566 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 | ------------------------------------------------------------------------------------------------------------------------------------ J101642.56+081835.9 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J101642.56+081835.9 2 COS/FUV TIME-TA PSA G130M 1222 none none none 1 1 486.0 S G J101642.56+081835.9 2 COS/FUV TIME-TA PSA G130M 1222 none none none 2 1 486.0 S G J101642.56+081835.9 2 COS/FUV TIME-TA PSA G130M 1222 none none none 3 1 486.0 S G J101642.56+081835.9 2 COS/FUV TIME-TA PSA G130M 1222 none none none 4 1 486.0 S G J101642.56+081835.9 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 2566.0 S G J101642.56+081835.9 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 2566.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 17] 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 | ------------------------------------------------------------------------------------------------------------------------------------ J101642.56+081835.9 5 COS/FUV TIME-TA PSA G130M 1291 none none none none 4 2566.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 18] Visit: 10 Visit Requirements: On Hold Comments: Additional Comments: G130M and G170M observations of J101642.56+081835.9, at z=0.587 quasar that probes the CGM of a foreground quasar at z=0.292. At this redshift, the absorption features of interest in G130M include the Lyman limit (1177 Ang), C III (1262 Ang), OVI (1340 Ang) while HI Lya falls within the coverage of G160M (1570 Ang). No features of interest fall in the G160M 1577 cenwave segment gap. 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 J101642.56+ COS/NUV ACQ/IMA PSA MIRRORA 1 5 S (5 S) 081835.9 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J101642.56+ COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=4879, FP-POS=3 1 2000 S 081835.9 G see below (2307 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J101642.56+ COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=4879, FP-POS=4 1 2000 S 081835.9 G see below (2546 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J101642.56+ COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11366, FP-POS=1 1 1000 S 081835.9 G see below (1114 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 J101642.56+ COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11366, FP-POS=2 1 1000 S 081835.9 G see below (1114 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 J101642.56+ COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11366, FP-POS=3 1 1000 S 081835.9 G see below (1114 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 J101642.56+ COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11366, FP-POS=4 1 1000 S 081835.9 G see below (1114 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 | ------------------------------------------------------------------------------------------------------------------------------------ J101642.56+081835.9 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J101642.56+081835.9 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 2307.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 19] 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 | ------------------------------------------------------------------------------------------------------------------------------------ J101642.56+081835.9 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 2546.0 S G J101642.56+081835.9 4 COS/FUV TIME-TA PSA G160M 1533 none none none none 3 1114.0 S G J101642.56+081835.9 5 COS/FUV TIME-TA PSA G160M 1533 none none none none 3 1114.0 S G J101642.56+081835.9 6 COS/FUV TIME-TA PSA G160M 1533 none none none none 4 1114.0 S G J101642.56+081835.9 7 COS/FUV TIME-TA PSA G160M 1533 none none none none 4 1114.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 20] Visit: 11 Visit Requirements: On Hold Comments: Additional Comments: G130M observations of J010506.03-295556.4, a z=0.8358 QSO probing the CGM of a foreground quasar at z=0.398. Features of interest at this redshift in G130M coverage include the Lyman limit (1274 Ang) and CIII (1365). The Lyman series edge is covered by the 1222 cenwave while CIII and all other features are covered by 1291. 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 J010506.03- COS/NUV ACQ/IMA PSA MIRRORA 1 7 S (7 S) 295556.4 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J010506.03- COS/FUV TIME-TA PSA G130M 1222 BUFFER-TIME=10360, FP-POS=ALL 1 400 S 295556.4 G see below (1996 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J010506.03- COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=4906, FP-POS=3 1 1000 S 295556.4 G see below (1216 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J010506.03- COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=4906, FP-POS=4 1 1000 S 295556.4 G see below (1216 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 | ------------------------------------------------------------------------------------------------------------------------------------ J010506.03-295556.4 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J010506.03-295556.4 2 COS/FUV TIME-TA PSA G130M 1222 none none none 1 1 499.0 S G J010506.03-295556.4 2 COS/FUV TIME-TA PSA G130M 1222 none none none 2 1 499.0 S G J010506.03-295556.4 2 COS/FUV TIME-TA PSA G130M 1222 none none none 3 1 499.0 S G J010506.03-295556.4 2 COS/FUV TIME-TA PSA G130M 1222 none none none 4 1 499.0 S G J010506.03-295556.4 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1216.0 S G J010506.03-295556.4 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1216.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 21] Visit: 12 Visit Requirements: On Hold Comments: Additional Comments: G130M observations of J010506.03-295556.4, a z=0.8358 QSO probing the CGM of a foreground quasar at z=0.398. Features of interest at this redshift in G130M coverage include the Lyman limit (1274 Ang), C III (1365 Ang), and OVI (1442 Ang) 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 J010506.03- COS/NUV ACQ/IMA PSA MIRRORA 1 7 S (7 S) 295556.4 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J010506.03- COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11479, FP-POS=1 1 2100 S 295556.4 G see below (2152 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J010506.03- COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11479, FP-POS=2 1 2100 S 295556.4 G see below (2592 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J010506.03- COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=11479, FP-POS=3 1 1000 S 295556.4 G see below (1125 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 J010506.03- COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=11479, FP-POS=4 1 1000 S 295556.4 G see below (1125 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 | ------------------------------------------------------------------------------------------------------------------------------------ J010506.03-295556.4 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J010506.03-295556.4 2 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 2152.0 S G J010506.03-295556.4 3 COS/FUV TIME-TA PSA G160M 1533 none none none none 2 2592.0 S G J010506.03-295556.4 4 COS/FUV TIME-TA PSA G160M 1577 none none none none 3 1125.0 S G J010506.03-295556.4 5 COS/FUV TIME-TA PSA G160M 1577 none none none none 3 1125.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 22] Visit: 13 Visit Requirements: On Hold Comments: Additional Comments: G160M observations of background QSO J010534.73-273657.9 which probes the CGM of a foreground QSO at z=0.5200. At this redshift, all key features fall in the G160M spectral coverage. 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 J010534.73- COS/NUV ACQ/IMA PSA MIRRORA 1 7 S (7 S) 273657.9 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J010534.73- COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11482, FP-POS=1 1 2100 S 273657.9 G see below (2152 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J010534.73- COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11482, FP-POS=2 1 2100 S 273657.9 G see below (2592 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J010534.73- COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11482, FP-POS=3 1 2100 S 273657.9 G see below (2592 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 | ------------------------------------------------------------------------------------------------------------------------------------ J010534.73-273657.9 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J010534.73-273657.9 2 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 2152.0 S G J010534.73-273657.9 3 COS/FUV TIME-TA PSA G160M 1533 none none none none 2 2592.0 S G J010534.73-273657.9 4 COS/FUV TIME-TA PSA G160M 1533 none none none none 3 2592.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 23] Visit: 14 Visit Requirements: On Hold Comments: Additional Comments: G160M observations of background QSO J010534.73-273657.9 which probes the CGM of a foreground QSO at z=0.5200. At this redshift, all key features fall in the G160M spectral coverage including the Lyman LImit (1386 Ang(, C III (1485 Ang), and OVI (1568 Ang). 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 J010534.73- COS/NUV ACQ/IMA PSA MIRRORA 1 7 S (7 S) 273657.9 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J010534.73- COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=11482, FP-POS=1 1 2100 S 273657.9 G see below (2163 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J010534.73- COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=11482, FP-POS=2 1 2100 S 273657.9 G see below (2592 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 | ------------------------------------------------------------------------------------------------------------------------------------ J010534.73-273657.9 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J010534.73-273657.9 2 COS/FUV TIME-TA PSA G160M 1577 none none none none 1 2163.0 S G J010534.73-273657.9 3 COS/FUV TIME-TA PSA G160M 1577 none none none none 2 2592.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 24] Visit: 15 Visit Requirements: On Hold Comments: Additional Comments: This visit will observe obtain G130M spectra of J145420.00+192629.4, a background quasar probing the CGM of a foreground quasar at z=0.4451. At this redshift the Lyman series below HI 972 falls in the G130M spectral coverage, but no features call in the segment gap for the 1291 cenwave setting. 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 J145420.00+ COS/NUV ACQ/IMA PSA MIRRORA 1 7 S (7 S) 192629.4 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J145420.00+ COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=4904, FP-POS=3 1 1200 S 192629.4 G see below (2316 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J145420.00+ COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=4904, FP-POS=4 1 1200 S 192629.4 G see below (2579 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 | ------------------------------------------------------------------------------------------------------------------------------------ J145420.00+192629.4 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J145420.00+192629.4 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 2316.0 S G J145420.00+192629.4 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 2579.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 25] Visit: 16 Visit Requirements: On Hold Comments: Additional Comments: This visit will observe obtain G130M spectra of J145420.00+192629.4, a background quasar probing the CGM of a foreground quasar at z=0.4451. At this redshift the HI 972, CIII, OVI, and Lya fall in the G160M spectral coverage. All features are covered by the 1589 and 1600 cenwave setting and none fall in the gap. 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 J145420.00+ COS/NUV ACQ/IMA PSA MIRRORA 1 7 S (7 S) 192629.4 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J145420.00+ COS/FUV TIME-TA PSA G160M 1589 BUFFER-TIME=11478, FP-POS=1 1 1200 S 192629.4 G see below (2158 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J145420.00+ COS/FUV TIME-TA PSA G160M 1589 BUFFER-TIME=11478, FP-POS=2 1 900 S 192629.4 G see below (2583 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J145420.00+ COS/FUV TIME-TA PSA G160M 1600 BUFFER-TIME=11478, FP-POS=3 1 600 S 192629.4 G see below (1120 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 J145420.00+ COS/FUV TIME-TA PSA G160M 1600 BUFFER-TIME=11478, FP-POS=4 1 600 S 192629.4 G see below (1120 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 | ------------------------------------------------------------------------------------------------------------------------------------ J145420.00+192629.4 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J145420.00+192629.4 2 COS/FUV TIME-TA PSA G160M 1589 none none none none 1 2158.0 S G J145420.00+192629.4 3 COS/FUV TIME-TA PSA G160M 1589 none none none none 2 2583.0 S G J145420.00+192629.4 4 COS/FUV TIME-TA PSA G160M 1600 none none none none 3 1120.0 S G J145420.00+192629.4 5 COS/FUV TIME-TA PSA G160M 1600 none none none none 3 1120.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 26] Visit: 17 Visit Requirements: On Hold Comments: Additional Comments: G130M visit for background quasar J015101.85+005631.7 which is at z=0.9849 and probes the CGM of a foreground quasar at z=0.492. At the redshift of the foreground quasar, all absorption lines of interest fall in the coverage of G160M with the Lyman limit at 1360 Ang and OVI at 1548 Ang. This visit includes half of the G160M exposures for this target. 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 J015101.85+ COS/NUV ACQ/IMA PSA MIRRORA 1 9 S (9 S) 005631.7 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J015101.85+ COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=11124, FP-POS=1 1 2100 S 005631.7 G see below (2132 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J015101.85+ COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=11124, FP-POS=2 1 2100 S 005631.7 G see below (2565 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J015101.85+ COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=11124, FP-POS=3 1 2100 S 005631.7 G see below (2565 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 | ------------------------------------------------------------------------------------------------------------------------------------ J015101.85+005631.7 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J015101.85+005631.7 2 COS/FUV TIME-TA PSA G160M 1577 none none none none 1 2132.0 S G J015101.85+005631.7 3 COS/FUV TIME-TA PSA G160M 1577 none none none none 2 2565.0 S G J015101.85+005631.7 4 COS/FUV TIME-TA PSA G160M 1577 none none none none 3 2565.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 27] Visit: 57 (Repeat of second and third orbits of visit 07) Visit Requirements: On Hold Comments: Additional Comments: G130M visit for background quasar J015101.85+005631.7 which is at z=0.9849 and probes the CGM of a foreground quasar at z=0.492. At the redshift of the foreground quasar, all absorption lines of interest fall in the coverage of G160M with the Lyman limit at 1360 Ang and OVI at 1548 Ang. Cenwaves 1533 and 1577 fully cover the desired features. This visit includes half of the G160M exposures for this target. 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 J015101.85+ COS/NUV ACQ/IMA PSA MIRRORA 1 9 S (9 S) 005631.7 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J015101.85+ COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11124, FP-POS=2 1 2100 S 005631.7 G see below (2121 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J015101.85+ COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11124, FP-POS=3 1 2100 S 005631.7 G see below (2565 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 | ------------------------------------------------------------------------------------------------------------------------------------ J015101.85+005631.7 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J015101.85+005631.7 2 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 2121.0 S G J015101.85+005631.7 3 COS/FUV TIME-TA PSA G160M 1533 none none none none 2 2565.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 28] Visit: 61 (Repeat of second orbit of visit 11) Visit Requirements: On Hold Comments: Additional Comments: G130M observations of J010506.03-295556.4, a z=0.8358 QSO probing the CGM of a foreground quasar at z=0.398. Features of interest at this redshift in G130M coverage include the Lyman limit (1274 Ang) and CIII (1365). The Lyman series edge is covered by the 1222 cenwave while CIII and all other features are covered by 1291. 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 J010506.03- COS/NUV ACQ/IMA PSA MIRRORA 1 7 S (7 S) 295556.4 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J010506.03- COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=4906, FP-POS=3 1 1000 S 295556.4 G see below (1100 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J010506.03- COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=4906, FP-POS=4 1 1000 S 295556.4 G see below (1100 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 | ------------------------------------------------------------------------------------------------------------------------------------ J010506.03-295556.4 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J010506.03-295556.4 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 1100.0 S G J010506.03-295556.4 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 1100.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 29] Visit: 63 (Repeat of first and second orbits of visit 13) Visit Requirements: On Hold Comments: Additional Comments: G160M observations of background QSO J010534.73-273657.9 which probes the CGM of a foreground QSO at z=0.5200. At this redshift, all key features fall in the G160M spectral coverage. 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 J010534.73- COS/NUV ACQ/IMA PSA MIRRORA 1 7 S (7 S) 273657.9 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J010534.73- COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11482, FP-POS=1 1 2100 S 273657.9 G see below (2152 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J010534.73- COS/FUV TIME-TA PSA G160M 1533 BUFFER-TIME=11482, FP-POS=2 1 2100 S 273657.9 G see below (2592 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 | ------------------------------------------------------------------------------------------------------------------------------------ J010534.73-273657.9 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J010534.73-273657.9 2 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 2152.0 S G J010534.73-273657.9 3 COS/FUV TIME-TA PSA G160M 1533 none none none none 2 2592.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 30] Visit: 67 (Repeat of visit 17) Visit Requirements: On Hold Comments: Additional Comments: G130M visit for background quasar J015101.85+005631.7 which is at z=0.9849 and probes the CGM of a foreground quasar at z=0.492. At the redshift of the foreground quasar, all absorption lines of interest fall in the coverage of G160M with the Lyman limit at 1360 Ang and OVI at 1548 Ang. This visit includes half of the G160M exposures for this target. 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 J015101.85+ COS/NUV ACQ/IMA PSA MIRRORA 1 9 S (9 S) 005631.7 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J015101.85+ COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=11124, FP-POS=1 1 2100 S 005631.7 G see below (2132 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 J015101.85+ COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=11124, FP-POS=2 1 2100 S 005631.7 G see below (2565 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 J015101.85+ COS/FUV TIME-TA PSA G160M 1577 BUFFER-TIME=11124, FP-POS=3 1 2100 S 005631.7 G see below (2565 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 | ------------------------------------------------------------------------------------------------------------------------------------ J015101.85+005631.7 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J015101.85+005631.7 2 COS/FUV TIME-TA PSA G160M 1577 none none none none 1 2132.0 S G J015101.85+005631.7 3 COS/FUV TIME-TA PSA G160M 1577 none none none none 2 2565.0 S G J015101.85+005631.7 4 COS/FUV TIME-TA PSA G160M 1577 none none none none 3 2565.0 S G 17803( 6) - 25-Sep-2025 21:46:46 - [ 31] Summary Form for Proposal 17803 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=10245, BUFFER-TIME=10265, BUFFER-TIME=10360, BUFFER-TIME=10431, BUFFER-TIME=10836, BUFFER-TIME=11124, BUFFER-TIME=11366, BUFFER-TIME=11393, BUFFER-TIME=11478, BUFFER-TIME=11479, BUFFER-TIME=11482, BUFFER-TIME=11552, BUFFER-TIME=11812, BUFFER-TIME=4108, BUFFER-TIME=4879, BUFFER-TIME=4904, BUFFER-TIME=4906, BUFFER-TIME=4922, BUFFER-TIME=7595, BUFFER-TIME=8982, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4, FP-POS=ALL ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, G160M, MIRRORA, MIRRORB ------------------------------------------------------------------------------------------------------------------------------------ Target Names J010506.03-295556.4, J010534.73-273657.9, J015101.85+005631.7, J084331.84+111235.3, J101642.56+081835.9, J131939.28+521849.2, J143624.30+353709.4, J145420.00+192629.4, J152122.42+092650.8 ------------------------------------------------------------------------------------------------------------------------------------