0 Assigned ID: 661 ----- Attempting Submission 1 (Wed Jan 30 19:49:49 GMT 2019) ----- Following a conversation with Mario Gennaro, I have made sure that the field-of-view of the WFC3 IR and UVIS apertures cover both the target supernova and as large a fraction of the galaxy as possible given the available orient ranges during the visibility windows I chose previously. I have listed the available orient ranges in the "visit orientation requirements" in each visit, and applied POS TARGs as required. After visit 02 I will once again review the observational strategy for this program, in case any changes need to be made to visits 03 and 04. 265750862 ----- Attempting Submission 1 (Tue Mar 19 14:26:09 GMT 2019) ----- ----- Attempting Submission 2 (Tue Apr 23 16:22:53 GMT 2019) ----- The late-time NIR light curve of SN 2018gv We ask for 4 orbits of WFC3 to complete observations of the Type Ia supernova (SN Ia) 2018gv conducted by HST program GO-15145. SNe Ia have long been used to measure extragalactic distances and constrain the cosmological parameters. However, the nature of their progenitors remains elusive, which adds a systematic uncertainty to their use as standard candles. Recently, late-time observations of SNe Ia (>500 days after maximum light) have provided a new diagnostic of SN Ia progenitor, explosion, and nebular physics. Here, we ask for 4 orbits of WFC3 to complete observe SN 2018gv out to 700 days past maximum light and explore its NIR light curve. We will visit SN 2018gv four times, with a cadence of 50-100 days. In each visit, we will image the SN with one orbit, split between F350LP and F160W. For the F350LP portion, we will use the WFC3-UVIS-DITHER-LINE-3PT dithering pattern; for the F160W portion - the WFC3-IR-DITHER-LINE pattern. Stellar Physics 3 false false false false false false false SUPPORTED EXT-STAR SUPERNOVA TYPE IA NO This object was generated by the targetselector and retrieved from the NED database. J2000 J2000 WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F350LP WFC3/IR Spectroscopic No No G141 POS-TARG DITHER 0.135 LINE false false 3 46.84 WFC3-UVIS-DITHER-LINE-3PT 2 false POS-TARG DITHER 0.636 LINE false false 2 41.788 WFC3-IR-DITHER-LINE 3 false The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. 1554889716000 95.2774540120472 (Tic-Visit :proposal-id 15693 :visit-id "01" :proposal-version -1 :trans-version "20181130" :date "18-Mar-2019 15:10:11.0" :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 1318880 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15693 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15693 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2761 :al-overhead-at-end 0 :internal-dur-at-end 500 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 /home/orgraur/projects/telescope_proposals/Cycle26_mid/OP-cache/late_18gv_phaseII_230419-v02.xml The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15693 :visit-id "02" :proposal-version -1 :trans-version "20181130" :date "23-Apr-2019 11:52:41.0" :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 1318880 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15693 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15693 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2761 :al-overhead-at-end 0 :internal-dur-at-end 500 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 /tmp/OPVisit3891202452380245581.xml The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15693 :visit-id "03" :proposal-version -1 :trans-version "20181130" :date "23-Apr-2019 12:18:04.0" :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 1318880 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15693 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15693 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2761 :al-overhead-at-end 0 :internal-dur-at-end 500 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0 /home/orgraur/projects/telescope_proposals/Cycle26_mid/OP-cache/late_18gv_phaseII_230419-v05.xml The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15693 :visit-id "05" :proposal-version -1 :trans-version "20181130" :date "23-Apr-2019 12:18:05.0" :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 1318880 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15693 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15693 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2761 :al-overhead-at-end 0 :internal-dur-at-end 500 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 1 0