An HST exclusive look at two rising stars: high-energy spectra of the two closest M dwarfs to host transiting terrestrial exoplanets

0 Assigned ID: 1636 ----- Attempting Submission 1 (Thu Apr 08 15:51:46 GMT 2021) ----- HST Phase I Proposal 1636 successfully submitted. Receipt: # 1636-1 ----- Attempting Submission 2 (Thu Apr 08 15:53:06 GMT 2021) ----- HST Phase I Proposal 1636 successfully submitted. Receipt: # 1636-2 ----- Attempting Submission 3 (Fri Apr 09 15:38:06 GMT 2021) ----- HST Phase I Proposal 1636 successfully submitted. Receipt: # 1636-3 This attribute cannot have this value due to other choices: Spectral_Element=G160M. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: G160M. This attribute cannot have this value due to other choices: Aperture=PSA. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: PSA. This attribute cannot have this value due to other choices: Optional_Parameter=FLASH=YES. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). YES is not a valid selection YES is not a valid selection This attribute cannot have this value due to other choices: Spectral_Element=G160M. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: G160M. This attribute cannot have this value due to other choices: Aperture=PSA. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: PSA. This attribute cannot have this value due to other choices: Optional_Parameter=FLASH=YES. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). YES is not a valid selection YES is not a valid selection This attribute cannot have this value due to other choices: Spectral_Element=G160M. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: G160M. This attribute cannot have this value due to other choices: Aperture=PSA. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: PSA. This attribute cannot have this value due to other choices: Optional_Parameter=FLASH=YES. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). YES is not a valid selection YES is not a valid selection This attribute cannot have this value due to other choices: Spectral_Element=G160M. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: G160M. This attribute cannot have this value due to other choices: Aperture=PSA. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: PSA. This attribute cannot have this value due to other choices: Optional_Parameter=FLASH=YES. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). YES is not a valid selection YES is not a valid selection This attribute cannot have this value due to other choices: Spectral_Element=G160M. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: G160M. This attribute cannot have this value due to other choices: Aperture=PSA. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: PSA. This attribute cannot have this value due to other choices: Optional_Parameter=FLASH=YES. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). YES is not a valid selection YES is not a valid selection This attribute cannot have this value due to other choices: Spectral_Element=G160M. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: G160M. This attribute cannot have this value due to other choices: Aperture=PSA. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: PSA. This attribute cannot have this value due to other choices: Optional_Parameter=FLASH=YES. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). YES is not a valid selection YES is not a valid selection This attribute cannot have this value due to other choices: Spectral_Element=G160M. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: G160M. This attribute cannot have this value due to other choices: Aperture=PSA. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: PSA. This attribute cannot have this value due to other choices: Optional_Parameter=FLASH=YES. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). YES is not a valid selection YES is not a valid selection This attribute cannot have this value due to other choices: Spectral_Element=G160M. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: G160M. This attribute cannot have this value due to other choices: Aperture=PSA. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). Illegal selection: PSA. This attribute cannot have this value due to other choices: Optional_Parameter=FLASH=YES. FLASH=NO is the only permitted value for G160M PSA exposures (implied LIFETIME-POS LP6). YES is not a valid selection YES is not a valid selection Removed FLASH=YES from visit 52. -1644250260 ----- Attempting Submission 1 (Thu Jul 22 09:21:59 GMT 2021) ----- HST Phase II Proposal 16722 successfully submitted. Receipt: # 16722-1 ----- Attempting Submission 2 (Wed Jul 28 09:42:36 GMT 2021) ----- HST Phase II Proposal 16722 successfully submitted. Receipt: # 16722-2 ----- Attempting Submission 3 (Fri Aug 06 16:10:53 GMT 2021) ----- HST Phase II Proposal 16722 successfully submitted. Receipt: # 16722-3 ----- Attempting Submission 4 (Tue Aug 17 08:04:11 GMT 2021) ----- HST Phase II Proposal 16722 successfully submitted. Receipt: # 16722-4 ----- Attempting Submission 5 (Mon Nov 01 16:10:42 GMT 2021) ----- HST Phase II Proposal 16722 successfully submitted. Receipt: # 16722-5 ----- Attempting Submission 6 (Tue Nov 02 14:03:21 GMT 2021) ----- HST Phase II Proposal 16722 successfully submitted. Receipt: # 16722-6 ----- Attempting Submission 7 (Sat Nov 06 13:11:01 GMT 2021) ----- HST Phase II Proposal 16722 successfully submitted. Receipt: # 16722-7 ----- Attempting Submission 8 (Sun Jan 30 17:08:26 GMT 2022) ----- ----- Attempting Submission 9 (Thu Jul 28 13:16:36 GMT 2022) ----- ----- Attempting Submission 10 (Thu Jul 28 15:50:33 GMT 2022) ----- FLASH=YES removed from visit 52. This visit replaces failed visit 02. An HST exclusive look at two rising stars: high-energy spectra of the two closest M dwarfs to host transiting terrestrial exoplanets As we build towards robustly detecting and characterizing the atmospheres of terrestrial exoplanets with JWST, we cannot forget to take a close look at the low-mass stars they orbit. Complete coverage of M dwarf ultraviolet spectra are needed to determine the photochemical production rates of molecular species in terrestrial planet atmospheres, which will alert us to when disequilibrium chemistry, a sign of surface processes or even life, is present. High-energy spectra from the UV to X-ray are also needed to calculate mass loss rates from planetary atmospheres, which can explain the lack of atmospheres around highly-irradiated terrestrial worlds. LTT 1445Ab and GJ 486b are two of the most spectroscopically accessible terrestrial exoplanets we will ever find, and their M dwarf hosts are similarly at the top of their class in terms of observability. We will use the unique ultraviolet capabilities of HST, supplemented by X-ray observations, to provide complete short-wavelength spectral coverage for the stars LTT 1445A and GJ 486. Both planets, LTT 1445Ab and GJ 486b, will be observed in JWST Cycle 1 with the aim of detecting their atmospheres. If we do not take the opportunity to make UV measurements of their host stars while HST is still operational, this crucial input to understanding the atmospheres of these planets will be lost. We request 18 orbits with HST (COS and STIS) to capture complete UV spectra of LTT 1445A and GJ 486. We will observe the complete UV spectra of the two closest M dwarfs to host transiting terrestrial worlds, LTT 1445A and GJ 486. The main goal of this program is to produce detailed, high S/N UV spectra for these two M dwarfs. This information will be key to assessing upcoming JWST Cycle 1 data that will try to establish the presence of an atmosphere on the terrestrial worlds orbiting them. We will use HST/COS & STIS to measure the UV spectra of these stars from 1050-3200 Angstroms. For the purposes of estimating exposure times, we scale the MUSCLES HST/COS and STIS data of the M dwarf GJ 436 to the distances and stellar radii of LTT 1445A and GJ 486. Both stars are considered inactive based on weak measurements of H-alpha and Ca II H and K and long stellar rotation periods, so we expect these stars (V = 11.22 and 11.40 for LTT 1445A and GJ 486, respectively) to pass the Bright Object Protection considerations. We note that binary companion to LTT 1445A, LTT 1445BC does exhibit activity (H-alpha emission) in one or both of the blended components. LTT 1445BC orbits the primary component on a 250-year timescale, and is currently at a separation of 7 arcseconds from LTT 1445A (Winters et al., 2019). The COS aperture is 2.5 arcseconds in diameter, which we will center on LTT 1445A without worrying about contamination from the BC companion. This is not an issue for GJ 486, which is a single star. LTT 1445A and GJ 486 have nearly identical V-band magnitudes, with nearly identical scalings by distance and radius (LTT 1445A is smaller, but it is also closer). This program includes a total of 15 orbits. UV: We will use COS to capture the FUV and NUV spectrum of both stars, but not the Ly-alpha line which is dominated by geocoronal emisison. All COS data will be taken in TIME-TAG mode to establish if flares occur during the orbits and we will use the FLASH=YES setting to maximize exposure time on target. To measure the prominent emission lines in the FUV we will use COS G130M (C III, Si III, N V, C II) for 3 orbits and COS G160M (Si IV, C IV, He II) for 2.5 orbits. These observations will provide S/N > 5, and up to 15, for prominent lines in this range. For the G130M grating we will use a central wavelength of 1222 Angstroms. This setting places the Ly-alpha line in the gap between Segments A and B, thereby protecting the instrument from excessive flux. For the G160M grating we will use a central wavelength of 1533 Angstroms. This will ensure overlap with the G130M grating such that there are no spectral gaps in the FUV. For the NUV we will use 0.5 orbits to observe with COS G230L with a central wavelength of 2950 Angstroms. COS G230L has a high sensitivity to the 1750-2100 Angstrom wavelength region, which is relevant to the photodissociation of O2 and subsequent production of O3. We will spend 6 orbits each with COS for LTT 1445A and GJ 486. Ly-alpha: Flux in the Ly-alpha line typically makes up 85% of all flux in emitted the FUV (France et al., 2016), so measuring it is essential to a successful measurement of a high-energy stellar spectrum. The core of the Ly-alpha line is eaten up by the ISM, but the profile can be reconstructed if enough flux is measured in the line wings (Youngblood et al., 2016). For all but the brightest stars, Ly-alpha measurements and reconstructions are untenable without a heavy investment of telescope time. But for nearby bright M dwarfs like LTT 1445A and GJ 486, we can gather enough flux to perform a reconstruction of the all-important Ly-alpha line. COS is a poor observer of Ly-alpha due to its relatively large aperture which lets in geocoronal contamination. We will instead use the 52x0.2" slit with STIS/G140M at a central wavelength of 1222 Angstroms to measure the wings of the Ly-alpha lines for LTT 1445A and GJ 486 without having to worry about geocoronal contamination. Another program (GO program 16701, PI A. Youngblood) will also make observations of LTT 1445A and GJ 486 with this same set-up. In that program 2 orbits will be spent on LTT 1445A and 1 orbit on GJ 486. In order to capture enough S/N in the wings of the Ly-alpha lines of these stars to perform a high-precision (15-20% error) reconstruction, we will add 1 orbit for LTT 1445A and 2 orbits for GJ 486, bringing the total orbit count to 3 for each star. We will limit the timing of these observations such that the barycentric velocity is within 20 km/s of the estimated ISM velocity. This ensures that in the case of a low N(H I) column density that any geocoronal airglow contamination will fall into the ISM absorption gap and not in the wings of the Ly-alpha line where airglow contamination can hinder line reconstruction. 1) Professor Lars Buchhave is an expert in spectroscopic observations and interpretations of exoplanets, their host stars, and their atmospheres. 2) Professor Lia Corrales is an expert in X-ray observations of nearby stellar planet hosts. 3) Dr. Diamond-Lowe is an observational astronomer specializing in investigations of exoplanetary atmospheres and the high-energy environments provided by their host stars. She is the PI of a successful HST/COS program (GO Program 15704) to capture the UV spectrum of a mid-M dwarf similar to the ones observed in this program. 4) Dr. George King has substantial experience with analysing data of late-type stars taken with a slew of X-ray telescopes (XMM-Newton, ROSAT, Swift, and Chandra). He has used these measurements to characterize the XUV environments of numerous exoplanets, including current mass loss rates, and assessing the evolution of exoplanet atmospheres that results from XUV irradiation. 5) Dr. Thea Kozakis is an expert in one-dimensional climate/photochemistry modeling of terrestrial planet atmospheres and the influence of host star activity effects on atmospheric chemistry and biosignatures. 6) Dr. Laura Kreidberg is an expert in observational characterization of exoplanet atmospheres and has led numerous Hubble observing programs with both WFC3 and COS. 7) Amber Medina is a senior graduate student who specializes in the spectroscopic analysis of magnetic activity indicators, as well as the detection, characterization, and statistical analysis of stellar flares. 8) Dr. Joao Mendonca is an expert in theoretical modeling of planet atmospheres, which includes using molecular cross-sections at UV wavelengths. 9) Dr. Jennifer Winters is an expert on the LTT 1445 system. She led the discovery paper of the LTT 1445 planet and is leading the follow-up mass determination effort for the planet. Exoplanets and Exoplanet Formation 6 false false true false false false 30 true SUPPORTED STAR M III-I NO Coordinates from Gaia EDR3, epoch=2016 LTT1445A J2000 J2000 STAR M III-I NO Coordinates and proper motions from Gaia EDR3. GJ486 J2000 J2000 COS/FUV Spectroscopic No No G130M 1222 COS/FUV Spectroscopic No No G160M 1533 COS/NUV Spectroscopic No No G230L 2950 STIS/FUV-MAMA Spectroscopic No No G140M 1222 STIS/NUV-MAMA Spectroscopic No No G230L 2376 STIS/CCD Spectroscopic No No G430L 4300 COS/FUV Spectroscopic No No G130M 1222 COS/FUV Spectroscopic No No G160M 1533 COS/NUV Spectroscopic No No G230L 2950 STIS/FUV-MAMA Spectroscopic No No G140M 1222 STIS/NUV-MAMA Spectroscopic No No G230L 2376 STIS/CCD Spectroscopic No No G430L 4300 1659023327743 The scheduling data was generated by CASM 30.3. CASM was run in Phase II mode. 1658170428000 244.53296169085831 (Tic-Visit :proposal-id 16722 :visit-id "01" :proposal-version -1 :trans-version "20220516" :date "28-Jul-2022 17:48:47.0" :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 69792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16722 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16722 :visit-id "01" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2763 :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 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16722 :visit-id "01" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2764 :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 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16722 :visit-id "01" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2764 :al-overhead-at-end 0 :internal-dur-at-end 334 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) true 3 0 1659023328694 The scheduling data was generated by CASM 30.3. CASM was run in Phase II mode. 1658524915000 246.6618281021751 (Tic-Visit :proposal-id 16722 :visit-id "02" :proposal-version -1 :trans-version "20220516" :date "28-Jul-2022 17:48:48.0" :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 95952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16722 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16722 :visit-id "02" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2763 :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 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16722 :visit-id "02" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2764 :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 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16722 :visit-id "02" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2764 :al-overhead-at-end 0 :internal-dur-at-end 334 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) true 3 0 1659023329528 The scheduling data was generated by CASM 30.3. CASM was run in Phase II mode. 1662993592000 276.4784321008444 (Tic-Visit :proposal-id 16722 :visit-id "52" :proposal-version -1 :trans-version "20220516" :date "28-Jul-2022 17:48:49.0" :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 95952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16722 :visit-id "52" :obset-id "52" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16722 :visit-id "52" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2763 :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 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16722 :visit-id "52" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2764 :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 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16722 :visit-id "52" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2764 :al-overhead-at-end 0 :internal-dur-at-end 334 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) true 3 0 1659023330036 The scheduling data was generated by CASM 30.3. CASM was run in Phase II mode. 1663125082000 298.6104331587075 (Tic-Visit :proposal-id 16722 :visit-id "03" :proposal-version -1 :trans-version "20220516" :date "28-Jul-2022 17:48:49.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 156976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16722 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16722 :visit-id "03" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2763 :al-overhead-at-end 0 :internal-dur-at-end 622 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) true 1 0 1659023330637 The scheduling data was generated by CASM 30.3. CASM was run in Phase II mode. 1656058424000 114.69406671010319 (Tic-Visit :proposal-id 16722 :visit-id "04" :proposal-version -1 :trans-version "20220516" :date "28-Jul-2022 17:48:50.0" :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 69792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16722 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16722 :visit-id "04" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2752 :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 3145 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16722 :visit-id "04" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2753 :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 3145 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16722 :visit-id "04" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2753 :al-overhead-at-end 0 :internal-dur-at-end 334 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) true 3 0 1659023331473 The scheduling data was generated by CASM 30.3. CASM was run in Phase II mode. 1656572807000 113.35331964086782 (Tic-Visit :proposal-id 16722 :visit-id "05" :proposal-version -1 :trans-version "20220516" :date "28-Jul-2022 17:48:51.0" :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 113328 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16722 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16722 :visit-id "05" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2752 :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 3145 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16722 :visit-id "05" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2753 :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 3145 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16722 :visit-id "05" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2753 :al-overhead-at-end 0 :internal-dur-at-end 334 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) true 3 0 1676989335609 /private/var/folders/8t/mg1bkfyj20xf2vfc_9vyhfs80006z1/T/OPVisit6101730291454393602.xml The scheduling data was generated by CASM 30.3. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16722 :visit-id "06" :proposal-version -1 :trans-version "20220630" :date "21-Feb-2023 09:22:15.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 313520 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16722 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16722 :visit-id "06" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2727 :al-overhead-at-end 0 :internal-dur-at-end 360 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16722 :visit-id "06" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2753 :al-overhead-at-end 0 :internal-dur-at-end 622 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) true 2 0