A Family Portrait of the O Stars in the Extremely Metal-Poor Galaxy Sextans A

0 Assigned ID: 2076 ----- Attempting Submission 1 (Fri Apr 09 18:13:32 GMT 2021) ----- HST Phase I Proposal 2076 successfully submitted. Receipt: # 2076-1 Removed all ORIENT constraints and changed the BUFFER-TIME for all G160M observations to 10,000s. 1736920711 ----- Attempting Submission 1 (Wed Jul 28 22:48:52 GMT 2021) ----- HST Phase II Proposal 16767 successfully submitted. Receipt: # 16767-1 ----- Attempting Submission 2 (Mon Oct 04 14:16:54 GMT 2021) ----- A Family Portrait of the O Stars in the Extremely Metal-Poor Galaxy Sextans A Low-metallicity massive stars may have reionized the universe at z > 6. Yet, their contribution to the ionizing photon budget remains unconstrained and can only be estimated from stellar models. The predicted ionizing flux is highly sensitive to theoretical mass-loss rates and metal opacities, but these have never been observationally determined below the metallicity of the SMC (20% solar). Observations of individually resolved, metal-poor O stars spanning a range of masses and evolutionary stages are needed to determine the contribution of high-redshift galaxies to cosmic reionization. Sextans A is the only nearby dwarf galaxy substantially more metal-poor than the SMC that hosts more than a few known O stars. Five have already been observed by COS and two more will be observed by ULLYSES, but these do not sample the full range of spectral types and luminosity classes. We propose new G130M and G160M COS observations of two late-O (super)giants that sample new parameter space. For the first time at 6% solar metallicity, the combined new and archival COS data will enable us to (1) empirically determine the photospheric metal opacities that set ionizing photon production; (2) measure mass-loss rates as a function of spectral type to improve the purely theoretical mass-loss prescriptions that underlie stellar evolution models; and (3) produce new stellar spectral templates tailored to the FUV observations that will be ideally suited to modeling the ionizing spectra of galaxies during the epoch of reionization. The proposed observations are urgently needed to interpret upcoming JWST campaigns at high redshift and can only be done with HST/COS. Here we plan observations of two O stars in the nearby, metal-poor galaxy Sextans A with the Cosmic Origins Spectrograph. We will use both the G130M and G160M gratings to get continuous coverage of important stellar wind and photospheric features to determine the mass-loss rates and abundances of these giant and supergiant O stars to constrain their output of ionizing photons. We obtained initial coordinates by locating the target stars in HST imaging with updated WCS information aligned to Gaia DR2. We then identified the target stars in the Gaia catalog and adopted the coordinates reported by Gaia for these observations. Gaia reports astrometric uncertainties less than 1 mas, but we conservatively estimate uncertainties of 0.01-0.02 arcsec. We estimate exposure times using the NUV F275W magnitude for one target star and the V-band magnitude for the other target, which is not covered by NUV HST imaging. We adopt conservative estimates of interstellar reddening assuming intrinsically blue colors typical of these spectral types and use the Bruzual O9 III spectral template in the COS ETC. We have tested various late-O giant and supergiant stellar templates in the COS ETC and confirm that the estimated exposure times will achieve SNR ~ 10 per resolution element near key wind features. We use these estimates of exposure times for both target acquisition and spectroscopic observations. All BUFFER-TIMES are 2/3 times the values reported by the COS ETC. We will use the ACQ/IMAGE mode with the PSA and Mirror A for target acquisition. All our observations satisfy the BOT safety standards. We organize the observations into visits of at most 3 orbits, as strongly encouraged for Cycle 29 observations. For all spectroscopic observations, we use TIME-TAG mode with FLASH=YES and SEGMENT=BOTH. We use the G130M grating with the 1291 central wavelength to cover the N V 1240, O V 1371, and Si IV 1400 stellar wind profiles. The G130M configuration only uses FP=3, 4 configurations to satisfy the COS2025 restrictions. We also use the G160M grating with the 1600 central wavelength to cover the Fe V 1428, S V 1502, C IV 1550, He II 1640, and N IV 1719 stellar wind and photospheric profiles. We use FP=All for the G160M observations to extend the possible wavelength coverage. Our team is well-positioned to deliver high-quality and timely analysis of the proposed observations. Collectively, we have published 10 papers on COS data from 10 HST-GO programs. PI Telford is leading the data analysis for an ongoing program analyzing COS spectra of three metal-poor massive stars (PID 15967, PI Chisholm) and has the expertise and technical skills needed to carry out the proposed analysis. Co-Is Berg and Chisholm have a great deal of experience working with COS spectra and both are leaders in the CLASSY program (PID 15840, PI Berg) to create a treasury of COS spectra of metal-poor, star-forming galaxies in the local universe. Chisholm has an extensive background in stellar population synthesis modeling and spatially unresolved observations of massive stars at both high and low metallicity. Co-I McQuinn has deep expertise in the stellar populations of nearby, metal-poor galaxies, including published work on the stellar population of the galaxy hosting our two target O stars, Sextans A. McQuinn and Telford are both experts on stellar evolution models and modeling the resolved stellar populations in nearby galaxies. Stellar Physics and Stellar Types 6 false false true false false false false false SUPPORTED EXT-STAR SUPERGIANT O NO J101104.78-044224.1 OB623 J2000 J2000 EXT-STAR GIANT O NO J101056.85-044040.9 J2000 J2000 F275W = 18.26 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G160M 1600 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G160M 1600 1633356878953 /private/var/folders/lr/nh68516n4xv4mswz71g156m80000gn/T/OPVisit14686749357566316048.xml The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16767 :visit-id "01" :proposal-version -1 :trans-version "20210514" :date "04-Oct-2021 10:14:38.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 147984 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16767 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16767 :visit-id "01" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2749 :al-overhead-at-end 0 :internal-dur-at-end 67 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "01" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 86 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "01" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2750 :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 3142 :pcs-gap 0 ) true 3 0 1633356879695 /private/var/folders/lr/nh68516n4xv4mswz71g156m80000gn/T/OPVisit5136116681028764670.xml The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16767 :visit-id "02" :proposal-version -1 :trans-version "20210514" :date "04-Oct-2021 10:14:39.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 95792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16767 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16767 :visit-id "02" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2749 :al-overhead-at-end 0 :internal-dur-at-end 67 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "02" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :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 3142 :pcs-gap 0 ) true 2 0 1633356880427 /private/var/folders/lr/nh68516n4xv4mswz71g156m80000gn/T/OPVisit16996552766461926745.xml The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16767 :visit-id "03" :proposal-version -1 :trans-version "20210514" :date "04-Oct-2021 10:14:40.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 95808 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16767 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16767 :visit-id "03" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2749 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "03" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "03" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 353 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 3 0 1633356881146 /private/var/folders/lr/nh68516n4xv4mswz71g156m80000gn/T/OPVisit3583465889819527413.xml The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16767 :visit-id "04" :proposal-version -1 :trans-version "20210514" :date "04-Oct-2021 10:14:41.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 95808 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16767 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16767 :visit-id "04" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2749 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "04" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "04" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 353 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 3 0 1633356881863 /private/var/folders/lr/nh68516n4xv4mswz71g156m80000gn/T/OPVisit3505301159361155806.xml The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16767 :visit-id "05" :proposal-version -1 :trans-version "20210514" :date "04-Oct-2021 10:14:41.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 95808 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16767 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16767 :visit-id "05" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2749 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "05" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "05" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 353 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 3 0 1633356882464 /private/var/folders/lr/nh68516n4xv4mswz71g156m80000gn/T/OPVisit9824912827110081638.xml The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16767 :visit-id "06" :proposal-version -1 :trans-version "20210514" :date "04-Oct-2021 10:14:42.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 69696 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16767 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16767 :visit-id "06" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2749 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "06" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 353 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 2 0 1633356883035 /private/var/folders/lr/nh68516n4xv4mswz71g156m80000gn/T/OPVisit17580407278726141918.xml The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16767 :visit-id "07" :proposal-version -1 :trans-version "20210514" :date "04-Oct-2021 10:14:42.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 69696 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16767 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16767 :visit-id "07" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2749 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "07" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 353 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 2 0 1633356883600 /private/var/folders/lr/nh68516n4xv4mswz71g156m80000gn/T/OPVisit11609055319364493944.xml The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16767 :visit-id "08" :proposal-version -1 :trans-version "20210514" :date "04-Oct-2021 10:14:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 104480 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16767 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16767 :visit-id "08" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2749 :al-overhead-at-end 0 :internal-dur-at-end 76 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "08" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :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 3142 :pcs-gap 0 ) true 2 0 1633356884145 /private/var/folders/lr/nh68516n4xv4mswz71g156m80000gn/T/OPVisit18396537936002465730.xml The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16767 :visit-id "09" :proposal-version -1 :trans-version "20210514" :date "04-Oct-2021 10:14:44.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 104480 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16767 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16767 :visit-id "09" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2749 :al-overhead-at-end 0 :internal-dur-at-end 76 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "09" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :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 3142 :pcs-gap 0 ) true 2 0 1633356884824 /private/var/folders/lr/nh68516n4xv4mswz71g156m80000gn/T/OPVisit4070872379199178626.xml The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16767 :visit-id "10" :proposal-version -1 :trans-version "20210514" :date "04-Oct-2021 10:14:44.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 95808 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16767 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16767 :visit-id "10" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2749 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "10" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "10" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 353 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 3 0 1633356885535 /private/var/folders/lr/nh68516n4xv4mswz71g156m80000gn/T/OPVisit697162721118631843.xml The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16767 :visit-id "11" :proposal-version -1 :trans-version "20210514" :date "04-Oct-2021 10:14:45.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 95808 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16767 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16767 :visit-id "11" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2749 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "11" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "11" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 353 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 3 0 1633356886102 /private/var/folders/lr/nh68516n4xv4mswz71g156m80000gn/T/OPVisit16338267642321406873.xml The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16767 :visit-id "12" :proposal-version -1 :trans-version "20210514" :date "04-Oct-2021 10:14:45.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 69696 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16767 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16767 :visit-id "12" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2749 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "12" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 353 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 2 0 1633356886655 /private/var/folders/lr/nh68516n4xv4mswz71g156m80000gn/T/OPVisit4430373912366653214.xml The scheduling data was generated by CASM 29.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16767 :visit-id "13" :proposal-version -1 :trans-version "20210514" :date "04-Oct-2021 10:14:46.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 69696 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16767 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16767 :visit-id "13" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2749 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16767 :visit-id "13" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2750 :al-overhead-at-end 0 :internal-dur-at-end 353 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3142 :pcs-gap 0 ) true 2 0