0 Assigned ID: 6968 ----- Attempting Submission 1 (Sun Apr 05 02:28:15 GMT 2026) ----- HST Phase I Proposal 6968 successfully submitted. Receipt: # 6968-1 ----- Attempting Submission 2 (Thu Apr 16 01:36:54 GMT 2026) ----- 0 ----- Attempting Submission 1 (Wed Aug 05 16:08:02 GMT 2026) ----- HST Phase II Proposal 18383 successfully submitted. Receipt: # 18383-1 ----- Attempting Submission 2 (Wed Aug 05 23:19:39 GMT 2026) ----- Resolving the Most Massive Black Holes: Testing a Fundamental Break in Black Hole-Galaxy Scaling Relations The co-evolution of galaxies and their central black holes (BHs) is thought to follow tight scaling relations, yet their validity at the highest galaxy masses remains untested. Observations of a handful of brightest cluster galaxies suggest that BH masses may exceed predictions from the M-sigma relation by up to an order of magnitude, indicating a possible transition in BH growth from velocity dispersion-regulated to merger-driven, stellar-mass-dominated assembly. However, this result is based on only six systems and lacks statistical significance. We propose HST/ACS/WFC imaging of a carefully selected sample of 20 ultra-massive early-type galaxies (stellar mass > 2.5e12 Msol) spanning diverse environments. Combined with existing JWST/NIRSpec and wide-field IFS data (VLT/MUSE or Magellan/ROSIE), these observations will enable the first unbiased dynamical measurements of BH masses at the extreme high-mass end. The requested HST data are essential to construct accurate stellar mass models across all spatial scales, resolving galaxy cores while tracing extended halos, and breaking degeneracies between BH mass and dark matter halo. This program will provide the first systematic calibration of the high-mass end of BH-galaxy scaling relations and deliver a decisive test of whether a fundamental transition in BH growth occurs in the most massive galaxies. Each visit consists of one HST orbit targeting a single ETG in two ACS/WFC filters: F814W and F555W. The visit is structured to maximize science exposure time within the 50-minute orbital visibility window. VISIT STRUCTURE (per target): - Guide star acquisition: ~6 min - F814W: 2 x 270s (total 540s), CR-SPLIT=2, GAIN=2 - Filter change: ~0.5 min - F555W: 2 x 900s (total 1800s), CR-SPLIT=2, GAIN=2 - Total science + overhead: ~49.5 min F814W is scheduled first to ensure the deeper F555W imaging is prioritized in the event of early orbit termination. DITHER STRATEGY: A 2-point dither pattern (ACS-WFC-DITHER-LINE or WFC-DITHER-BOX-MIN) is applied between the two sub-exposures in each filter to: (1) enable cosmic ray rejection between the CR-SPLIT pairs, (2) improve sub-pixel sampling of the PSF, (3) mitigate the effect of hot pixels and chip defects. Dither step size: ~0.5 arcsec along the diagonal to ensure adequate pixel phase coverage. APERTURE AND ORIENTATION: Aperture: WFC (full frame, 202" x 202" field of view, 0.05"/pixel) No ORIENT constraint required; any orientation is acceptable for photometric imaging. BACKGROUND: No special background constraints. Low background (shadow) is preferred but not required given the surface brightness of the targets (mu_i ~ 15.2 mag/arcsec^2 at the core break radius). SPECIAL REQUIREMENTS: None. Standard ACS/WFC imaging mode. No coronagraph, no grism, no special readout pattern required. - NO ORIENT constraint - NO SAME ORIENT between visits required - Scheduling: no time-critical constraints - Guide stars: standard two-gyro mode acceptable - Availability: schedulable any time within Cycle 34 S/N JUSTIFICATION: The 1:3 exposure ratio (F814W:F555W = 540s:1800s) is designed to deliver equal S/N ~ 30 per pixel at the core break radius in both filters, accounting for the intrinsic (V-I) ~ 1.25 mag color of the old stellar populations in these giant elliptical galaxies (mu_i ~ 15.2 mag/arcsec^2 from Pan-STARRS photometry; D. D. Nguyen et al. 2023). This S/N is sufficient for accurate MGE surface brightness profile fitting and stellar mass model construction from the BH sphere of influence to the outer halo. REFERENCES: D. D. Nguyen, M. Cappellari, and M. Pereira-Santaella, 2023, MNRAS, 526, 3548. Dr. Nguyen (PI) has an internationally recognized track record in high-angular-resolution HST imaging and black hole mass measurements directly relevant to this program. He has extensive experience designing and executing HST/ACS imaging observations and constructing MGE stellar mass models from HST photometry, the two core data products requested here. His expertise spans the full analysis chain, from HST image reduction and surface brightness profile extraction, to high-precision stellar and gas kinematics from VLT/MUSE, Magellan/ROSIE, and JWST/NIRSpec, to state-of-the-art JAM and Schwarzschild dynamical modeling for robust black hole mass measurements in the most massive early-type galaxies. He led the construction of the parent sample used in this program and will serve as the primary driver of all HST data reduction, stellar mass modeling, and dynamical black hole mass measurements. Dr. Gallo's primary field of research is observational high energy astrophysics, with a main focus on the properties of accreting black holes across the mass spectrum. She has published over 100 refereed papers on the topic including using JWST/MIRI observations of black hole X-ray binaries. She will contribute to the data interpretation. Mr. Hai Ngo (Co-I) is a doctoral candidate at the University of Michigan with expertise in dynamical black hole mass measurements using stellar dynamics with JWST/NIRSpec and Keck/OSIRIS combined with JAM modeling. He has extensive hands-on experience in HST imaging data reduction and analysis, including PSF characterization, surface brightness profile extraction, and MGE modeling, making him the team's primary resource for processing the requested ACS/WFC data. His dual expertise in both imaging and dynamical modeling ensures seamless integration between the HST data products and the downstream black hole mass measurements that are the central goal of this program. Supermassive Black Holes and Active Galaxies Galaxies 6 false false false false false false false SUPPORTED GALAXY ELLIPTICAL YES This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 GALAXY ELLIPTICAL YES J2000 J2000 GALAXY ELLIPTICAL YES J2000 J2000 GALAXY ELLIPTICAL YES This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 GALAXY ELLIPTICAL YES This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 GALAXY ELLIPTICAL YES This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 GALAXY ELLIPTICAL YES This object was generated by the targetselector and retrieved from the SIMBAD database. 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J2000 J2000 ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "01" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 05:33:03.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "01" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2977 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "02" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 06:05:06.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "02" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2979 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "03" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 06:05:10.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "03" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2673 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2976 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "04" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 05:24:09.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "04" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2977 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "05" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 05:48:08.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "05" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2979 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "06" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 05:48:18.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "06" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2977 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "07" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 05:48:23.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "07" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2979 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "08" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 05:48:28.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "08" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2682 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2983 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "09" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 05:48:31.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "09" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2979 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "10" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 06:09:44.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "10" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2673 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2974 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "11" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 05:53:27.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "11" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2979 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "12" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 06:15:31.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "12" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2675 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2976 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "13" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 06:17:48.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "13" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2673 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2976 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "14" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 05:56:39.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "14" :obset-id "14" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "14" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2979 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "15" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 06:10:42.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "15" :obset-id "15" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "15" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2673 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2976 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "16" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 06:11:51.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "16" :obset-id "16" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "16" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2671 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2974 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "17" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 06:02:32.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "17" :obset-id "17" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "17" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2979 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "18" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 06:13:50.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "18" :obset-id "18" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "18" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2671 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2974 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "19" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 06:03:03.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "19" :obset-id "19" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "19" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2676 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2977 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18383 :visit-id "20" :proposal-version -1 :trans-version "20260618" :date "06-Aug-2026 06:13:57.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 852672 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18383 :visit-id "20" :obset-id "20" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18383 :visit-id "20" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2671 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2974 :pcs-gap 0 ) true 1 0