Using STIS ultraviolet spectroscopy to understand the physical properties, evolution, and structure of white dwarfs in sixteen newly discovered ultracompact binaries.

0 Assigned ID: 2323 ----- Attempting Submission 1 (Fri Apr 09 21:57:46 GMT 2021) ----- HST Phase I Proposal 2323 successfully submitted. Receipt: # 2323-1 ----- Attempting Submission 2 (Fri Apr 09 23:09:20 GMT 2021) ----- HST Phase I Proposal 2323 successfully submitted. Receipt: # 2323-2 ----- Attempting Submission 3 (Fri Apr 09 23:26:46 GMT 2021) ----- Shortened buffer times on remaining visits -262659691 ----- Attempting Submission 1 (Wed Jul 28 14:55:18 GMT 2021) ----- ----- Attempting Submission 2 (Mon Feb 14 18:40:55 GMT 2022) ----- ----- Attempting Submission 3 (Thu Jul 21 19:32:24 GMT 2022) ----- ----- Attempting Submission 4 (Mon Aug 01 17:34:06 GMT 2022) ----- ----- Attempting Submission 5 (Wed Sep 07 13:55:17 GMT 2022) ----- ----- Attempting Submission 6 (Thu Oct 06 18:25:47 GMT 2022) ----- ----- Attempting Submission 7 (Wed Oct 12 18:55:20 GMT 2022) ----- ----- Attempting Submission 8 (Tue Mar 14 18:22:57 GMT 2023) ----- Using STIS ultraviolet spectroscopy to understand the physical properties, evolution, and structure of white dwarfs in sixteen newly discovered ultracompact binaries. Here, we propose to conduct a campaign to obtain HST STIS ultraviolet spectroscopy of 15 confirmed ultracompact binary systems discovered using the Zwicky Transient Facility. These observations will be used as a sensitive tool to measure the temperature and other physical properties in these systems, and will serve as a sensitive probe of accretion. The objective of this program is to obtain STIS spectroscopy and lightcurves of 16 ultracompact binary systems. Our main objective is to obtain a good continuum measurement, as well as measurements of the Lyman series of Hydrogen lines (which are very broad in these white dwarfs). There are a few notes about observing here: 1. ZTF J2243 and ZTF J1946 will both require offset acquisitions since there are brighter stars within 5". 2. ZTF J1901 has an orbital period of 40.5 minutes, and we are observing it for 38.5 minutes in the first exposure. Since this target is only observed for one orbit, it would be valuable to get both the primary and secondary eclipses in the system (they happen 20.25 minutes apart). There are two ways we could do this (1. just do a CVZ orbit, which would get way more SNR), or 2. (try and schedule the observation to start within a window such that the 2 minute gap in coverage doesn't fall on one of the eclipses). Burdge is an expert in characterizing ultracompact binaries, and will lead the data analysis and interpretation of results from this program. Prince is Burdge's thesis advisor, and an expert in identifying ultracompact binaries, and interpreting their implications for gravitational wave detectors such as LISA. Caiazzo is an expert in charactering white dwarf stars, and will assist in atmospheric modelling of these extreme objects. Gaensicke is an expert in white dwarf stars and using HST STIS spectra to characterize them. He will assist in reducing and analyzing the data obtained with this program. Marsh is an expert in modelling short orbital period binary stars, and will help in the temporal analysis of both the spectra and the STIS lightcurves. Stellar Physics and Stellar Types 6 false false true false false false false false SUPPORTED STAR DA NO J2000 J2000 STAR DA NO There is a nearby star within 5" which is brighter in the red bands, so we will want to do an offset acquisition. J2000 J2000 STAR DA NO J2000 J2000 STAR DA NO J2000 J2000 STAR DA NO J2000 J2000 STAR DA NO J2000 J2000 STAR DA NO J2000 J2000 STAR DA NO J2000 J2000 STAR DA J2000 J2000 STAR DA NO There is a nearby star within 5" which is brighter in the red bands, so we will want to do an offset acquisition. J2000 J2000 STAR DA NO J2000 J2000 STAR DA NO J2000 J2000 STAR DA NO J2000 J2000 STAR DA NO J2000 J2000 STAR DA NO J2000 J2000 STAR DA NO J2000 J2000 STAR M V-IV This is an offset star for ZTFJ2243+5442 J2000 CALIBRATION UNDESIGNATED J2000 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 STIS/FUV-MAMA Spectroscopic No No G140L 1425 1678817891516 C:\Users\Kevin\AppData\Local\Temp\OPVisit7625963995393245011.xml The scheduling data was generated by CASM 31.0. 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CASM was run in Phase II mode. 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CASM was run in Phase II mode. (Tic-Visit :proposal-id 16689 :visit-id "16" :proposal-version -1 :trans-version "20220630" :date "14-Mar-2023 14:18:20.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 1235472 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16689 :visit-id "16" :obset-id "16" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16689 :visit-id "16" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2598 :al-overhead-at-end 0 :internal-dur-at-end 178 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16689 :visit-id "16" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2788 :al-overhead-at-end 0 :internal-dur-at-end 361 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16689 :visit-id "16" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2788 :al-overhead-at-end 0 :internal-dur-at-end 623 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) true 3 0 1678817901098 C:\Users\Kevin\AppData\Local\Temp\OPVisit10109385392482037400.xml The scheduling data was generated by CASM 31.0. CASM was run in Phase II mode. 1676144694000 88.2219946188983 (Tic-Visit :proposal-id 16689 :visit-id "10" :proposal-version -1 :trans-version "20220630" :date "14-Mar-2023 14:18:20.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 678800 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16689 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16689 :visit-id "10" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2763 :al-overhead-at-end 0 :internal-dur-at-end 178 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16689 :visit-id "10" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2764 :al-overhead-at-end 0 :internal-dur-at-end 361 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16689 :visit-id "10" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2764 :al-overhead-at-end 0 :internal-dur-at-end 623 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) true 3 0 1678817901720 C:\Users\Kevin\AppData\Local\Temp\OPVisit6494197204875525897.xml The scheduling data was generated by CASM 31.0. CASM was run in Phase II mode. 1652573837000 257.1672076818968 (Tic-Visit :proposal-id 16689 :visit-id "11" :proposal-version -1 :trans-version "20220630" :date "14-Mar-2023 14:18:21.0" :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 296128 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16689 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16689 :visit-id "11" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2845 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3238 :pcs-gap 0 ) true 1 0 1678817902047 C:\Users\Kevin\AppData\Local\Temp\OPVisit2993605811092739973.xml The scheduling data was generated by CASM 31.0. CASM was run in Phase II mode. 1665819637000 81.2524453654787 (Tic-Visit :proposal-id 16689 :visit-id "12" :proposal-version -1 :trans-version "20220630" :date "14-Mar-2023 14:18:21.0" :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 226544 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16689 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16689 :visit-id "12" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2940 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) true 1 0 1678817902810 C:\Users\Kevin\AppData\Local\Temp\OPVisit11778697546883824463.xml The scheduling data was generated by CASM 31.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16689 :visit-id "13" :proposal-version -1 :trans-version "20220630" :date "14-Mar-2023 14:18:22.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 1235472 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16689 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16689 :visit-id "13" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2787 :al-overhead-at-end 0 :internal-dur-at-end 178 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16689 :visit-id "13" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2788 :al-overhead-at-end 0 :internal-dur-at-end 361 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16689 :visit-id "13" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2788 :al-overhead-at-end 0 :internal-dur-at-end 623 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3180 :pcs-gap 0 ) true 3 0 1678817903405 C:\Users\Kevin\AppData\Local\Temp\OPVisit1680059147098470658.xml The scheduling data was generated by CASM 31.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16689 :visit-id "14" :proposal-version -1 :trans-version "20220630" :date "14-Mar-2023 14:18:23.0" :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 800592 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16689 :visit-id "14" :obset-id "14" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16689 :visit-id "14" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2892 :al-overhead-at-end 0 :internal-dur-at-end 178 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3285 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16689 :visit-id "14" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2893 :al-overhead-at-end 0 :internal-dur-at-end 623 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3285 :pcs-gap 0 ) true 2 0 1678817591891 C:\Users\Kevin\OneDrive\Documents\OP-cache\new-v15.xml The scheduling data was generated by CASM 31.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16689 :visit-id "15" :proposal-version -1 :trans-version "20220630" :date "14-Mar-2023 14:13:11.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 2035648 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16689 :visit-id "15" :obset-id "15" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16689 :visit-id "15" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2787 :al-overhead-at-end 0 :internal-dur-at-end 178 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3238 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16689 :visit-id "15" :orbit-number 2 :pcs-time 392 :si-vis-utilization 2788 :al-overhead-at-end 0 :internal-dur-at-end 361 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3238 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16689 :visit-id "15" :orbit-number 3 :pcs-time 392 :si-vis-utilization 2788 :al-overhead-at-end 0 :internal-dur-at-end 361 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3238 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16689 :visit-id "15" :orbit-number 4 :pcs-time 392 :si-vis-utilization 2788 :al-overhead-at-end 0 :internal-dur-at-end 361 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3238 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16689 :visit-id "15" :orbit-number 5 :pcs-time 392 :si-vis-utilization 2788 :al-overhead-at-end 0 :internal-dur-at-end 623 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3238 :pcs-gap 0 ) true 5 0