Lyman Continuum and Lyman Alpha escape in the high-ionization conditions observed in the Epoch of Reionization

This target is not used in this proposal. For G160M observations, please consult Chapter 9 of the COS Instrument Handbook to estimate overheads and the number of exposures per orbit, and consequently the correct lifetime position. Use of LP4 with G160M requires justification in the "Special Requirements" section of the Phase I PDF. Use of the default LP6 with G160M requires no justification. Proposals can be submitted with the warning present. For G160M observations, please consult Chapter 9 of the COS Instrument Handbook to estimate overheads and the number of exposures per orbit, and consequently the correct lifetime position. Use of LP4 with G160M requires justification in the "Special Requirements" section of the Phase I PDF. Use of the default LP6 with G160M requires no justification. Proposals can be submitted with the warning present. For G160M observations, please consult Chapter 9 of the COS Instrument Handbook to estimate overheads and the number of exposures per orbit, and consequently the correct lifetime position. Use of LP4 with G160M requires justification in the "Special Requirements" section of the Phase I PDF. Use of the default LP6 with G160M requires no justification. Proposals can be submitted with the warning present. For G160M observations, please consult Chapter 9 of the COS Instrument Handbook to estimate overheads and the number of exposures per orbit, and consequently the correct lifetime position. Use of LP4 with G160M requires justification in the "Special Requirements" section of the Phase I PDF. Use of the default LP6 with G160M requires no justification. Proposals can be submitted with the warning present. For G160M observations, please consult Chapter 9 of the COS Instrument Handbook to estimate overheads and the number of exposures per orbit, and consequently the correct lifetime position. Use of LP4 with G160M requires justification in the "Special Requirements" section of the Phase I PDF. Use of the default LP6 with G160M requires no justification. Proposals can be submitted with the warning present. For G160M observations, please consult Chapter 9 of the COS Instrument Handbook to estimate overheads and the number of exposures per orbit, and consequently the correct lifetime position. Use of LP4 with G160M requires justification in the "Special Requirements" section of the Phase I PDF. Use of the default LP6 with G160M requires no justification. Proposals can be submitted with the warning present. For G160M observations, please consult Chapter 9 of the COS Instrument Handbook to estimate overheads and the number of exposures per orbit, and consequently the correct lifetime position. Use of LP4 with G160M requires justification in the "Special Requirements" section of the Phase I PDF. Use of the default LP6 with G160M requires no justification. Proposals can be submitted with the warning present. For G160M observations, please consult Chapter 9 of the COS Instrument Handbook to estimate overheads and the number of exposures per orbit, and consequently the correct lifetime position. Use of LP4 with G160M requires justification in the "Special Requirements" section of the Phase I PDF. Use of the default LP6 with G160M requires no justification. Proposals can be submitted with the warning present. For G160M observations, please consult Chapter 9 of the COS Instrument Handbook to estimate overheads and the number of exposures per orbit, and consequently the correct lifetime position. Use of LP4 with G160M requires justification in the "Special Requirements" section of the Phase I PDF. Use of the default LP6 with G160M requires no justification. Proposals can be submitted with the warning present. For G160M observations, please consult Chapter 9 of the COS Instrument Handbook to estimate overheads and the number of exposures per orbit, and consequently the correct lifetime position. Use of LP4 with G160M requires justification in the "Special Requirements" section of the Phase I PDF. Use of the default LP6 with G160M requires no justification. Proposals can be submitted with the warning present. For G160M observations, please consult Chapter 9 of the COS Instrument Handbook to estimate overheads and the number of exposures per orbit, and consequently the correct lifetime position. Use of LP4 with G160M requires justification in the "Special Requirements" section of the Phase I PDF. Use of the default LP6 with G160M requires no justification. Proposals can be submitted with the warning present. 0 Assigned ID: 7402 ----- Attempting Submission 1 (Thu Apr 16 14:33:15 GMT 2026) ----- HST Phase I Proposal 7402 successfully submitted. Receipt: # 7402-1 ----- Attempting Submission 2 (Thu Apr 16 22:01:26 GMT 2026) ----- HST Phase I Proposal 7402 successfully submitted. Receipt: # 7402-2 These configurations are consistent with the LP6 requirements This investigator's institution has no country in the STScI database. 0 ----- Attempting Submission 1 (Tue Aug 18 20:10:49 GMT 2026) ----- Gabor does not currently have an affiliated institution Lyman Continuum and Lyman Alpha escape in the high-ionization conditions observed in the Epoch of Reionization JWST has revealed the properties of the galaxies that likely reionized the universe: compact star-forming galaxies that are highly ionized and very efficient producers of ionizing photons. These observed conditions push the limit of low-redshift observations and the current generation of stellar models. Theory suggests that these extreme coniditions may be due to very bursty star formation histories, accreting black holes, exotic stellar population, top-heavy initial mass function, extremely dense conditions, gas that is undergoing catastrophic cooling, or have a highly clumpy gaseous distribution. Low-redshift observations of galaxies with similar ionization conditions are extremely rare, such that only three galaxies with similar ionization properties have LyC observations with HST. Here, we propose 55 orbits of HST/COS G140L+G160M observations to probe the LyC and Ly-alpha properties of the 11 most extremely ionized and efficient producers of ionizing photons in the SDSS at z~0.3. These observations will 1) test the astrophysics of LyC escape in highly ionized nebular conditions to infer whether indirect LyC indicators can be used for the highly ionized conditions of the epoch of reionization, 2) discern whether highly ionized conditions enable Ly-alpha photons to efficiently escape, and 3) reveal whether the nebular continuum dominates the light of highly ionized high-redshift galaxies. These observations will fortify HST's legacy of LyC observations by revealing the astrophysics of extremely rare local conditions that have been commonly found during the epoch of reionization, and cement the methods to reveal the sources of cosmic reionization. Each target will first be acquired with ACQ/IMAGE using MIRRORA. The acquisition ETC calculations use the observed GALEX NUV magnitudes, with SED-based estimates when required. Exposure times are chosen to obtain S/N (>20) in a (9x9) pixel box. The maximum ACQ/IMAGE time per exposure is 700 s for any target. All galaxies are assumed to have radii (<0.2''), ensuring that essentially all of the UV emission falls within the COS aperture. We will use two COS/FUV spectroscopic configurations: 1) G140L/800 to measure the Lyman continuum. The observations use COS/FUV, G140L, CENWAVE=800, TIME-TAG, SEGMENT=A, with All FP-POS positions. The LyC is observed near 912(1+z), corresponding to observed wavelengths of approximately (1185-1310) for the sample. The ETC calculations are designed to detect an escaping LyC continuum corresponding to (f_{\rm esc}=5%) at (>3\sigma) significance after binning by 400 pixels. Following Izotov et al. 2018, the intrinsic LyC flux density is estimated from the extinction-corrected SDSS H-alpha flux using the (I_H-alpha)/I(912))-EW relation, and the ETC normalization is reduced by a factor of 20 to represent (fesc=5%). The resulting expected LyC flux densities are approximately 1.3x10^-18-2.0x10^-17 erg s-1 cm-2 A^-1 across the sample. In addition to the LyC measurement, G140L/800 provides broad FUV spectral coverage extending to approximately rest-frame 1500 for the lower-redshift targets, allowing independent measurements of the UV continuum. 2) G160M to resolve the Ly-alpha line profile. The observations use COS/FUV, G160M, TIME-TAG, with target-specific central wavelengths of 1533, 1577, 1589, or 1623 selected according to redshift so that Ly-alpha falls securely in the center of the detector and away from the detector gap. The Ly-alpha line is observed at (1215.67(1+z)), corresponding to approximately 1581-1744 for the sample. For the ETC calculations, the continuum is normalized using the GALEX NUV photometry, supplemented by the SED-based estimates where appropriate, and extrapolated to rest-frame 1216 assuming (f_\lambda \propto \lambda^{-2}). The resulting continuum flux densities near Ly-alpha span approximately (3.9\times10^-17-5.5x10^-16 erg s^-1 cm^-2 A^{-1}. Exposure times are chosen to obtain S/N (>3) in the continuum near Ly-alpha after binning by 100 pixels. The Ly-alpha emission itself is expected to be substantially brighter than the continuum, and the G160M resolution of <50 km/ resolves the blue and red Ly-alpha peaks and measure their velocity structure. Each target requires approximately 0.5 orbit for target acquisition, 1.5 orbits for the G160M spectrum, and 3 orbits for the G140L spectrum, for a total of 5 orbits per target and 55 orbits for the full sample. Data reduction, analysis, and interpretation will be done as in our previous GO 13744, GO 14635, GO 15136, GO 15639, GO 15941, GO 16271, GO 16672, GO 17100, GO 17109, GO 17169, GO 17171, GO 17452 projects and documented in Izotov et al. (2016, Nature, 529, 178; 2016, MNRAS, 461, 3683; 2018, 474, 4514; 2018, MNRAS, 478, 485; 2020, MNRAS, 491, 468; 2021, MNRAS, 503, 1734; 2022, MNRAS, 515, 2864; 2023, MNRAS, 522, 1228; 2024, MNRAS, 527, 281; 2024, MNRAS, 528, L10) and Schaerer et al. (2018, A&A, 616, L14; 2022, A&A, 658, L11). Our team includes experts on all relevant aspects and disposes of all necessary tools, including a custom pipeline for faint COS spectra (Worseck et al. 2011, ApJ, 722, L24; Syphers et al. 2012, AJ, 143, 100), SED fitting tools, and others. All galaxies possess SDSS spectra with which Izotov and Guseva derived data such as nebular line ratios, Hbeta and HeII emission-line luminosities, starburst ages and masses, limits on photoionization by WR stars and shocks, element abundances, specific star formation rates, etc. necessary for interpreting the UV data. We thus expect to produce scientific results promptly after the data are obtained, as already demonstrated for our successful GO programs 13744, 14635, 15136, 15433, 15639, 15941, 16271, 16672, 17100, 17109, 17169, 17171, 17452 in numerous papers. Galaxies 6 false true false false false false false SUPPORTED GALAXY EMISSION LINE NEBULA STARBURST NO F(1216*(1+z) = 1629) = 2e-16 F(912 *(1+z) = 1221) = 1.33e-17 J2000 J2000 FUV=21.57+/-0.39, NUV=20.78+/-0.21 GALAXY EMISSION LINE NEBULA STARBURST NO F(1216*(1+z) = 1581) = 2e-16 F(912*(1+z) = 1186.0) = 5e-18 J2000 J2000 NUV=20.84+/-0.40 GALAXY EMISSION LINE NEBULA STARBURST NO F(1216*(1+z) = 1682.5) = 3.85e-17 F(912*(1+z) = 1261.8) = 1.3e-18 J2000 J2000 NUV=22.50+/-0.64 GALAXY EMISSION LINE NEBULA STARBURST NO F(1216*(1+z) = 1593.3) = 4.45e-17 F(912*(1+z) = 1195.0) = 1.03e-17 J2000 J2000 NUV=22.46+/-0.64 GALAXY EMISSION LINE NEBULA STARBURST NO F(1216*(1+z) = 1630.0) = 1.16e-16 F(912*(1+z) = 1222.5) = 3.33e-18 J2000 J2000 FUV=20.97+/-0.19, NUV=21.37+/-0.23 GALAXY EMISSION LINE NEBULA STARBURST NO F(1216*(1+z) = 1650.6) = 4.85e-17 F(912*(1+z) = 1237.9) = 7.52e-18 J2000 J2000 NUV=22.29+/-0.51 GALAXY EMISSION LINE NEBULA STARBURST NO F(1216*(1+z) = 1744) = 1.03e-16 F(912*(1+z) = 1308) = 3.02e-18 J2000 J2000 FUV=21.74+/-0.54, NUV=21.35+/-0.33 GALAXY EMISSION LINE NEBULA STARBURST NO F(1216*(1+z) = 1652) = 9.13e-17 F(912*(1+z) = 1239.3) = 1.89e-17 J2000 J2000 FUV=22.38+/-0.56, NUV=21.60+/-0.13 GALAXY EMISSION LINE NEBULA STARBURST NO F(1216*(1+z) = 1619) = 5.47e-16 F(912*(1+z) = 1214) = 1.97e-17 J2000 NUV = 19.70 +/- 0.1, FUV = 21.00+/- 0.29 GALAXY EMISSION LINE NEBULA STARBURST NO F(1216*(1+z) = 1616) = 6.03e-17 F(912*(1+z) = 1212) = 6.62e-18 J2000 J2000 NUV = 22.10 GALAXY EMISSION LINE NEBULA STARBURST NO F(1216*(1+z) = 1615) = 6.04e-17 F(912*(1+z) = 1239) = 4.16e-18 J2000 J2000 FUV=22.1+/--0.29, NUV=22.05+/-0.25 COS/FUV Spectroscopic No No G140L 800 COS/FUV Spectroscopic No No G160M 1577 COS/FUV Spectroscopic No No G140L 800 COS/FUV Spectroscopic No No G160M 1533 COS/FUV Spectroscopic No No G140L 800 COS/FUV Spectroscopic No No G160M 1589 COS/FUV Spectroscopic No No G140L 800 COS/FUV Spectroscopic No No G160M 1533 COS/FUV Spectroscopic No No G140L 800 COS/FUV Spectroscopic No No G160M 1577 COS/FUV Spectroscopic No No G140L 800 COS/FUV Spectroscopic No No G160M 1577 COS/FUV Spectroscopic No No G140L 800 COS/FUV Spectroscopic No No G160M 1623 COS/FUV Spectroscopic No No G140L 800 COS/FUV Spectroscopic No No G160M 1577 COS/FUV Spectroscopic No No G140L 800 COS/FUV Spectroscopic No No G160M 1533 COS/FUV Spectroscopic No No G140L 800 COS/FUV Spectroscopic No No G160M 1533 COS/FUV Spectroscopic No No G140L 800 COS/FUV Spectroscopic No No G160M 1577 1787053395244 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18435 :visit-id "01" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 14:43:15.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 96048 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18435 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18435 :visit-id "01" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2597 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2977 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "01" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2597 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2977 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "01" :orbit-number 3 :pcs-time 380 :si-vis-utilization 2597 :al-overhead-at-end 0 :internal-dur-at-end 339 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2977 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "01" :orbit-number 4 :pcs-time 380 :si-vis-utilization 2597 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2977 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "01" :orbit-number 5 :pcs-time 380 :si-vis-utilization 2597 :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 5 0 1787054949804 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18435 :visit-id "02" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 15:09:09.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 130992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18435 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18435 :visit-id "02" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2599 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2979 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "02" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2599 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2979 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "02" :orbit-number 3 :pcs-time 380 :si-vis-utilization 2599 :al-overhead-at-end 0 :internal-dur-at-end 339 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2979 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "02" :orbit-number 4 :pcs-time 380 :si-vis-utilization 2599 :al-overhead-at-end 0 :internal-dur-at-end 160 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2979 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "02" :orbit-number 5 :pcs-time 380 :si-vis-utilization 2599 :al-overhead-at-end 0 :internal-dur-at-end 469 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2979 :pcs-gap 0 ) true 5 0 1787055013537 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18435 :visit-id "03" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 15:10:13.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 130992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18435 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18435 :visit-id "03" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2597 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2977 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "03" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2597 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2977 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "03" :orbit-number 3 :pcs-time 380 :si-vis-utilization 2597 :al-overhead-at-end 0 :internal-dur-at-end 363 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2977 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "03" :orbit-number 4 :pcs-time 380 :si-vis-utilization 2597 :al-overhead-at-end 0 :internal-dur-at-end 160 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2977 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "03" :orbit-number 5 :pcs-time 380 :si-vis-utilization 2597 :al-overhead-at-end 0 :internal-dur-at-end 469 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2977 :pcs-gap 0 ) true 5 0 1787055142304 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18435 :visit-id "04" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 15:12:22.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 130992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18435 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18435 :visit-id "04" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2603 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2983 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "04" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2603 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2983 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "04" :orbit-number 3 :pcs-time 380 :si-vis-utilization 2603 :al-overhead-at-end 0 :internal-dur-at-end 363 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2983 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "04" :orbit-number 4 :pcs-time 380 :si-vis-utilization 2603 :al-overhead-at-end 0 :internal-dur-at-end 160 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2983 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "04" :orbit-number 5 :pcs-time 380 :si-vis-utilization 2603 :al-overhead-at-end 0 :internal-dur-at-end 469 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2983 :pcs-gap 0 ) true 5 0 1787055207103 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18435 :visit-id "05" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 15:13:27.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 130992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18435 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18435 :visit-id "05" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2596 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2976 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "05" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2596 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2976 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "05" :orbit-number 3 :pcs-time 380 :si-vis-utilization 2596 :al-overhead-at-end 0 :internal-dur-at-end 363 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2976 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "05" :orbit-number 4 :pcs-time 380 :si-vis-utilization 2596 :al-overhead-at-end 0 :internal-dur-at-end 160 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2976 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "05" :orbit-number 5 :pcs-time 380 :si-vis-utilization 2596 :al-overhead-at-end 0 :internal-dur-at-end 469 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2976 :pcs-gap 0 ) true 5 0 1787055310968 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18435 :visit-id "06" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 15:15:10.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 130992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18435 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18435 :visit-id "06" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2607 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2987 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "06" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2607 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2987 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "06" :orbit-number 3 :pcs-time 380 :si-vis-utilization 2607 :al-overhead-at-end 0 :internal-dur-at-end 363 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2987 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "06" :orbit-number 4 :pcs-time 380 :si-vis-utilization 2607 :al-overhead-at-end 0 :internal-dur-at-end 160 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2987 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "06" :orbit-number 5 :pcs-time 380 :si-vis-utilization 2607 :al-overhead-at-end 0 :internal-dur-at-end 469 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2987 :pcs-gap 0 ) true 5 0 1787053401644 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18435 :visit-id "07" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 14:43:21.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 130992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18435 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18435 :visit-id "07" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2631 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "07" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2631 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "07" :orbit-number 3 :pcs-time 380 :si-vis-utilization 2631 :al-overhead-at-end 0 :internal-dur-at-end 329 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "07" :orbit-number 4 :pcs-time 380 :si-vis-utilization 2631 :al-overhead-at-end 0 :internal-dur-at-end 160 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "07" :orbit-number 5 :pcs-time 380 :si-vis-utilization 2631 :al-overhead-at-end 0 :internal-dur-at-end 469 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3011 :pcs-gap 0 ) true 5 0 1787055412578 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18435 :visit-id "08" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 15:16:52.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 130992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18435 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18435 :visit-id "08" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2664 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3044 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "08" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2664 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3044 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "08" :orbit-number 3 :pcs-time 380 :si-vis-utilization 2664 :al-overhead-at-end 0 :internal-dur-at-end 339 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3044 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "08" :orbit-number 4 :pcs-time 380 :si-vis-utilization 2664 :al-overhead-at-end 0 :internal-dur-at-end 160 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3044 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "08" :orbit-number 5 :pcs-time 380 :si-vis-utilization 2664 :al-overhead-at-end 0 :internal-dur-at-end 469 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3044 :pcs-gap 0 ) true 5 0 1787055495617 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18435 :visit-id "09" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 15:18:15.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 157056 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18435 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18435 :visit-id "09" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2646 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3026 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "09" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2646 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3026 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "09" :orbit-number 3 :pcs-time 380 :si-vis-utilization 2646 :al-overhead-at-end 0 :internal-dur-at-end 372 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3026 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "09" :orbit-number 4 :pcs-time 380 :si-vis-utilization 2646 :al-overhead-at-end 0 :internal-dur-at-end 160 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3026 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "09" :orbit-number 5 :pcs-time 380 :si-vis-utilization 2646 :al-overhead-at-end 0 :internal-dur-at-end 469 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3026 :pcs-gap 0 ) true 5 0 1787055541243 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18435 :visit-id "10" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 15:19:01.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 130992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18435 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18435 :visit-id "10" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2612 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2992 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "10" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2612 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2992 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "10" :orbit-number 3 :pcs-time 380 :si-vis-utilization 2612 :al-overhead-at-end 0 :internal-dur-at-end 363 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2992 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "10" :orbit-number 4 :pcs-time 380 :si-vis-utilization 2612 :al-overhead-at-end 0 :internal-dur-at-end 160 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2992 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "10" :orbit-number 5 :pcs-time 380 :si-vis-utilization 2612 :al-overhead-at-end 0 :internal-dur-at-end 469 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2992 :pcs-gap 0 ) true 5 0 1787055615823 The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18435 :visit-id "11" :proposal-version -1 :trans-version "20260618" :date "18-Aug-2026 15:20:15.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 130992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18435 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18435 :visit-id "11" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2612 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2992 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "11" :orbit-number 2 :pcs-time 380 :si-vis-utilization 2612 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2992 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "11" :orbit-number 3 :pcs-time 380 :si-vis-utilization 2612 :al-overhead-at-end 0 :internal-dur-at-end 339 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2992 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "11" :orbit-number 4 :pcs-time 380 :si-vis-utilization 2612 :al-overhead-at-end 0 :internal-dur-at-end 160 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2992 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18435 :visit-id "11" :orbit-number 5 :pcs-time 380 :si-vis-utilization 2612 :al-overhead-at-end 0 :internal-dur-at-end 469 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2992 :pcs-gap 0 ) true 5 0