The Metallicity Distribution Functions of Ultra-Faint Dwarf Galaxies

0 Assigned ID: 20 ----- Attempting Submission 1 (Tue Mar 26 20:19:04 GMT 2019) ----- HST Phase I Proposal 20 (ufd_mdfs.apt) successfully submitted. Receipt: # 20-1 ----- Attempting Submission 2 (Tue Apr 02 23:34:57 GMT 2019) ----- HST Phase I Proposal 20 (ufd_mdfs.apt) successfully submitted. Receipt: # 20-2 ----- Attempting Submission 3 (Tue Apr 02 23:35:54 GMT 2019) ----- HST Phase I Proposal 20 (ufd_mdfs.apt) successfully submitted. Receipt: # 20-3 ----- Attempting Submission 4 (Thu Apr 04 00:40:45 GMT 2019) ----- HST Phase I Proposal 20 (ufd_mdfs.apt) successfully submitted. Receipt: # 20-4 ----- Attempting Submission 5 (Fri Apr 05 23:50:38 GMT 2019) ----- HST Phase I Proposal 20 (ufd_mdfs.apt) successfully submitted. Receipt: # 20-5 0 ----- Attempting Submission 1 (Thu Jul 25 13:53:13 GMT 2019) ----- HST Phase II Proposal 15901 (ufd_mdfs_dithers.apt) successfully submitted. Receipt: # 15901-1 ----- Attempting Submission 2 (Sat Sep 07 21:17:46 GMT 2019) ----- The Metallicity Distribution Functions of Ultra-Faint Dwarf Galaxies Ultra-faint dwarf galaxies (UFDs) are fossil galaxies from the reionization era that have varied internal metallicity spreads (up to 0.8 dex), suggestive of remarkably complex star formation and enrichment processes (e.g., neutron star mergers) for such small galaxies. However, only a handful of stars in each system are bright enough for spectroscopic metallicity measurement from the ground. We propose deep WFC3/UVIS F395N (Ca H & K) imaging to measure [Fe/H] for individual stars in 18 UFDs that orbit the Milky Way (MW). Our Ca H & K photometry will increase the number of stars in these 18 systems with accurate metallicities (~0.1-0.2 dex) by a factor of 30 (from ~80 to ~2000), making this the largest-ever study of metallicities in UFDs. In this program we will (1) construct and characterize the first metallicity distribution functions (MDFs) for each UFD from > 100 stars; (2) undertake a systematic search for extremely metal-poor stars in UFDs; (3) use our MDFs, Gaia-based orbital histories, and HST-based star formation histories to track the evolution of UFDs from their formation in the early Universe to when they quenched; (4) publish membership information for community spectroscopic followup. This program will fundamentally transform our understanding how the lowest-mass galaxies in the Universe form and evolve. It is only possible due to the excellent blue-optical sensitivity of HST -- no other ground- or space-based facility can acquire this data. This novel, new use of HST will establish it as a leader for measuring metallicities of resolved stellar populations outside the MW, further expanding its legacy for nearby galaxy studies. This program will obtain F395N (Ca H &K) and F475W of 18 ultra-faint dwarf galaxies (UFDs) around the Milky Way using WFC3/UVIS. The combination of F395N and F475W imaging plus deep archival F814W imaging enables the measurement of stellar metallicity from photometry. Using this photometric metallicity technique, we will measure metallicities of stars in each galaxy down to F475W~24.5. Most of the orbit allocation is dedicated to F395N imaging. Modest F475W exposures are included to provide S/N>10 at F475W~24.5. We include one 30-second exposure in F475W filter to avoid saturating the stars at ~16 magnitude red giant branch stars. We use single visits for each galaxy. Most galaxies have 2 orbit visits. In each orbit, we include one F475W exposure and 4 long F395N exposures. For 3 galaxies we make use of CVZ orbits. Small dithers are performed between orbits in order to remove hot pixels and to smooth the detector response. We do not cover the chip gap. Dithers are implemented using POS-TARG requirements following the dither pattern optimized for measuring proper motions of nearby galaxies from previous Treasury programs (i.e., shifts of about 2 pixels). We will obtain coordinated parallel exposures with ACS in F475W and F814W filters to construct color-magnitude diagrams in a an outer region of the galaxies to help with statistical removal of non-member stars, which is necessary for some of our science goals. Due to an unresolved disagreement with the TTRB over wording in the Phase I proposal of HST-GO-15902, we were required to remove any orient constraints from this program as well. Dr. Daniel Weisz (program PI) is an expert on resolved stellar populations with HST, the Local Group, color-magnitude diagrams, star formation histories, and the formation and evolution of dwarf galaxies. He has worked on over 1500 orbits of HST data of resolved stellar populations, and has been first author of 10 papers using HST observations of nearby galaxies in the past decade. Dr. Weisz will lead analysis and oversee execution of this program. Dr. Else Starkenburg (program co-PI) is a co-PI of the PRISTINE CaHK survey of the MW and an expert in both theory and observations of metal-poor stars, the Galactic halo, and dwarf galaxies. Dr. Starkenburng will oversee theoretical interpretation of our results. Dr. Nicolas Martin (program co-PI) is a co-PI of the PRISTINE CaHK survey of the MW and is an expert in observations of metal-poor stars and satellite galaxies around the MW and M31, particularly with SDSS, Pan-STARRS, and Keck/DEIMOS. He will oversee spectroscopic follow up for northern targets. Dr. Matthew Walker is an expert observer of ultra-faint dwarf galaxies, dark matter, and has led dozens of publications on velocity dispersions, dark matter content, and chemistry of dwarf galaxies. He will oversee spectroscopic followup for southern targets. Dr. Mario Mateo is the principle investigator of Magellan/M2FS spectrograph, is an expert in all types of observations of dwarf galaxies, and wrote the seminal annual review (Mateo 1998) on dwarf galaxies in the Local Group. Dr. Patrick Cote is an expert on ground-based observations of nearby galaxies and galaxy groups, particularly with the CFHT. Dr. Andrew Dolphin is an expert on resolved stellar populations, is the author of DOLPHOT, the most widely used PSF photometry reduction routine for HST, and is also author of MATCH, the CMD fitting package that we will use to measure SFHs in this program. Prof. Michael Boylan-Kolchin is a theorist with particular expertise in dwarf galaxies and dark matter, and is a member of the FIRE collaboration. He will help facilitate theoretical interpretation of our findings. Mr. Nathan Sandford and Mr. Nicolas Longeard are graduate students working with PI Weisz and Co-PI Martin, respectively. Stellar Populations 6 false false false false false false false SUPPORTED GALAXY DWARF SPHEROIDAL This object was generated by the targetselector and retrieved from the SIMBAD database. Central coordinates were adjusted to match HST observations of Draco II from GO-14734 J2000 J2000 GALAXY DWARF SPHEROIDAL This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 GALAXY DWARF SPHEROIDAL This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 GALAXY DWARF SPHEROIDAL This object was generated by the targetselector and retrieved from the SIMBAD database. 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J2000 J2000 WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N WFC3/UVIS Imaging No No F475W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F395N ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041433335 1582096649000 87.92742480685843 (Tic-Visit :proposal-id 15901 :visit-id "01" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:03:52.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 2576096 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2905 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3238 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "01" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2936 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3238 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041435560 1584835240000 258.66353893879256 (Tic-Visit :proposal-id 15901 :visit-id "02" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:03:54.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3158112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2824 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3157 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "02" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2850 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3157 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041437626 (Tic-Visit :proposal-id 15901 :visit-id "03" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:03:57.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3158112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2809 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "03" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2840 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3145 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041439530 1584222588000 235.8595122944406 (Tic-Visit :proposal-id 15901 :visit-id "04" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:03:59.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3158112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2951 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3285 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "04" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2970 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3285 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041441365 1582322468000 100.0 (Tic-Visit :proposal-id 15901 :visit-id "05" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:04:00.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3158112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2995 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "05" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3026 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041443156 1581753616000 72.41728936626151 (Tic-Visit :proposal-id 15901 :visit-id "06" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:04:02.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3158112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2999 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "06" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3030 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 27.2. 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CASM was run in Phase II mode. 1568041446715 1588121041000 127.28455808616872 (Tic-Visit :proposal-id 15901 :visit-id "08" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:04:06.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3158112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "08" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2999 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "08" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3030 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041449427 1582537326000 94.70446767239417 (Tic-Visit :proposal-id 15901 :visit-id "09" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:04:08.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3158112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "09" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2999 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "09" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3030 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041451140 1583040514000 116.93940787445172 (Tic-Visit :proposal-id 15901 :visit-id "10" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:04:10.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3158112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "10" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2999 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "10" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3030 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041453582 1591805692000 118.0 (Tic-Visit :proposal-id 15901 :visit-id "11" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:04:12.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 4592800 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "11" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2847 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "11" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2878 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "11" :orbit-number 3 :pcs-time 302 :si-vis-utilization 2878 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) true 3 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041456061 1591708921000 101.85054891574782 (Tic-Visit :proposal-id 15901 :visit-id "12" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:04:15.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 4592800 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "12" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2847 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "12" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2878 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "12" :orbit-number 3 :pcs-time 302 :si-vis-utilization 2878 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) true 3 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041459359 1589045842000 237.98152770472922 (Tic-Visit :proposal-id 15901 :visit-id "13" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:04:18.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 6027488 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "13" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2999 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "13" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3031 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "13" :orbit-number 3 :pcs-time 302 :si-vis-utilization 3030 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "13" :orbit-number 4 :pcs-time 302 :si-vis-utilization 3030 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) true 4 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041462721 1594388434000 253.07646647956915 (Tic-Visit :proposal-id 15901 :visit-id "14" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:04:21.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 6027488 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "14" :obset-id "14" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "14" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2824 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3157 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "14" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2855 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3157 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "14" :orbit-number 3 :pcs-time 302 :si-vis-utilization 2855 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3157 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "14" :orbit-number 4 :pcs-time 302 :si-vis-utilization 2855 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3157 :pcs-gap 0 ) true 4 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041466083 (Tic-Visit :proposal-id 15901 :visit-id "15" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:04:25.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 6027488 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "15" :obset-id "15" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "15" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2823 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "15" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2854 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "15" :orbit-number 3 :pcs-time 302 :si-vis-utilization 2854 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "15" :orbit-number 4 :pcs-time 302 :si-vis-utilization 2854 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) true 4 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041619669 1592261209000 205.73944269068664 (Tic-Visit :proposal-id 15901 :visit-id "16" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:06:59.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 4877024 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "16" :obset-id "16" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 15901 :visit-id "16" :orbit-number 1 :pcs-time 333 :si-vis-utilization 10318 :al-overhead-at-end 80 :internal-dur-at-end 699 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041470545 1587935538000 219.09130351140084 (Tic-Visit :proposal-id 15901 :visit-id "17" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:04:30.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 2585152 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "17" :obset-id "17" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 15901 :visit-id "17" :orbit-number 1 :pcs-time 333 :si-vis-utilization 4547 :al-overhead-at-end 116 :internal-dur-at-end 699 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 1568041622259 1587599962000 205.17749247371398 (Tic-Visit :proposal-id 15901 :visit-id "18" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:07:01.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 4877024 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "18" :obset-id "18" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 15901 :visit-id "18" :orbit-number 1 :pcs-time 333 :si-vis-utilization 10288 :al-overhead-at-end 110 :internal-dur-at-end 699 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) true 2 0 1568041443156 (Tic-Visit :proposal-id 15901 :visit-id "06" :proposal-version -1 :trans-version "20190514" :date "09-Sep-2019 11:04:02.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 3158112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15901 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15901 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2999 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15901 :visit-id "06" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3030 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) false 2 0