0 Assigned ID: 1014 ----- Attempting Submission 1 (Fri Apr 07 22:39:55 GMT 2017) ----- 0 ----- Attempting Submission 1 (Mon Jul 17 18:40:43 GMT 2017) ----- Revealing the Environmental Dependence in Superluminous Supernovae Diversity Superluminous Supernovae (SLSNe) are a rare, exotic new class of transients, 50 times brighter than classical supernovae, that have only been identified within the past decade. Little is known about the nature of the progenitors of these massive explosions. To date fewer than 100 of these have been discovered, and most have single-band photometry, poor light-curve coverage, and are at low to moderate redshift. The Dark Energy Survey (DES) has spectroscopically-classified 17 SLSNe from 0.2 < z < 2.0, all of which have well-cadenced griz photometry spanning the entirety of the 5.5 month DES observing season. While the data quality is uniformly excellent, the variability in the SLSNe themselves is remarkable: the rise time, the decline rate, and the peak magnitudes all exhibit large variations. Here we propose to obtain rest-frame NUV photometry to probe the environment of SLSNe discovered in DES. We will determine the local and global star-formation rates (SFRs), and morphology and compactness of the galaxy. These observations will double the existing sample of SLSNe at z>0.5 for which these host-galaxy properties can be determined. We will then use this information to conduct the first systematic study of host-galaxy correlations with SLSN light-curve properties. By tying environmental constraints to observed characteristics of the explosion, this study will get to the heart of the SLSN progenitor question. We observe with WFC3-UVIS the host galaxies of all 17 superluminous supernovae (SLSNe) discovered in the first 4 years of the Dark Energy Survey (DES). The purpose of these observations is to a) constrain their local and global star-formation rates, and b) measure their host-galaxy morphologies, with the goal of correlating this information with the SLSNe DES multi-band light-curves and learning how these rare events depend on their environments. The best indicator of star-formation rate on the scale of < 100Myr is measuring the NUV flux emitted from young, massive stars. For each SLSN host galaxy we observe in the filter such that such that the effective wavelength is closest to 2500A: F336W (0.20 < z < 0.45); F390W (0.45 < z < 0.75); F475W (0.75 < z < 1); F555W (1 < z < 1.2); F606W (1.2 < z < 1.4); F625W (1.4 < z < 1.8); and F775W (1.8 < z < 2.3). Our exposure times are driven by their ability to produce a density profile of NUV flux measurements, such that measurements local to the SLSN can be made and compared across the galaxy. Our goal is to achieve a minimum SNR in the UV of ~5 per 2x2 binned pixel (0.08" x 0.08"), allowing the SN location to be localized and trends across the galaxy measured. According to the WFC ETC, for the 12 detected hosts in our sample (g < 25.5) we reach our desired SNR in a single orbit. For the other 5 non-detected hosts, we use WFC3-UVIS to detect the galaxy and measure the global SFR. We make a 10-sigma detection of these galaxies down to m ~ 27.5 with a two-orbit observations. We execute a 4-point dither for each observation, and add FLASH to observations where the APT suggests the electron background would otherwise be too low. Stellar Physics Galaxies and the IGM 6 false false false false false false false SUPPORTED GALAXY STAR FORMING REGION J2000 J2000 g=23.8 GALAXY STAR FORMING REGION J2000 J2000 g=24.7 GALAXY STAR FORMING REGION J2000 J2000 g>25.5 GALAXY STAR FORMING REGION J2000 J2000 g=23.4 GALAXY STAR FORMING REGION J2000 J2000 g=22.3 GALAXY STAR FORMING REGION J2000 J2000 g=25.5 GALAXY STAR FORMING REGION J2000 J2000 g=24.0 GALAXY STAR FORMING REGION J2000 J2000 g>26.5 GALAXY STAR FORMING REGION J2000 J2000 g>26.5 GALAXY STAR FORMING REGION J2000 J2000 g>25.5 GALAXY STAR FORMING REGION J2000 J2000 g=25.5 GALAXY STAR FORMING REGION J2000 J2000 r=24.7 GALAXY STAR FORMING REGION J2000 J2000 r=23.8 GALAXY STAR FORMING REGION J2000 J2000 r=24.6 GALAXY STAR FORMING REGION J2000 J2000 r>25.5 GALAXY STAR FORMING REGION J2000 J2000 i=23.5 GALAXY STAR FORMING REGION J2000 J2000 i=24.9 WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F475W WFC3/UVIS Imaging No No F475W WFC3/UVIS Imaging No No F475W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F625W WFC3/UVIS Imaging No No F775W WFC3/UVIS Imaging No No F775W POS-TARG DITHER 0.173 LINE 0.112 false false 81.785 4 23.884 WFC3-UVIS-DITHER-BOX 1 false The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. 1514427046000 62.28061620458831 (Tic-Visit :proposal-id 15303 :visit-id "01" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:15.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2866 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. 1519547939000 87.0 (Tic-Visit :proposal-id 15303 :visit-id "02" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:17.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2890 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3225 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. (Tic-Visit :proposal-id 15303 :visit-id "03" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:18.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2886 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3225 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15303 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2996 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3225 :pcs-gap 0 ) false 2 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F390W 1517556801000 73.1478821306354 (Tic-Visit :proposal-id 15303 :visit-id "04" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:19.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2866 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. 1530590063000 227.75060460954177 (Tic-Visit :proposal-id 15303 :visit-id "05" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:22.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2890 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3225 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. 1531682183000 247.36924530956628 (Tic-Visit :proposal-id 15303 :visit-id "06" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:24.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2866 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. 1531270257000 241.40881348544963 (Tic-Visit :proposal-id 15303 :visit-id "07" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:25.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "07" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2866 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. 1512042793000 17.2710234421709 (Tic-Visit :proposal-id 15303 :visit-id "08" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:27.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "08" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2886 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3225 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15303 :visit-id "08" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2996 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3225 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. 1517917190000 75.13263407864471 (Tic-Visit :proposal-id 15303 :visit-id "09" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:28.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "09" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2872 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3205 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15303 :visit-id "09" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2982 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3205 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. 1517460732000 73.56976807824279 (Tic-Visit :proposal-id 15303 :visit-id "10" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:29.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "10" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2872 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3205 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15303 :visit-id "10" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2982 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3205 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. (Tic-Visit :proposal-id 15303 :visit-id "11" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:30.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "11" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2892 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3225 :pcs-gap 0 ) false 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. (Tic-Visit :proposal-id 15303 :visit-id "12" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:31.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "12" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2892 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3225 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. 1531008000000 245.41818316623983 (Tic-Visit :proposal-id 15303 :visit-id "13" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:32.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "13" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2868 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. 1530829623000 229.87768061704867 (Tic-Visit :proposal-id 15303 :visit-id "14" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:34.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "14" :obset-id "14" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "14" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2892 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3225 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. (Tic-Visit :proposal-id 15303 :visit-id "15" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:35.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "15" :obset-id "15" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "15" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2868 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15303 :visit-id "15" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2980 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) false 2 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. 1511348209000 45.251833935256286 (Tic-Visit :proposal-id 15303 :visit-id "16" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:36.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "16" :obset-id "16" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "16" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2965 :al-overhead-at-end 119 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3298 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. A dithered set of exposures using the F336W filter. (Tic-Visit :proposal-id 15303 :visit-id "17" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 14:37:37.0" :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 1154992 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15303 :visit-id "17" :obset-id "17" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15303 :visit-id "17" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2889 :al-overhead-at-end 119 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3225 :pcs-gap 0 ) false 1 0