0 Assigned ID: 527 ----- Attempting Submission 1 (Fri Apr 07 14:03:23 GMT 2017) ----- HST Phase I Proposal 527 (Planckarc_cycle25.apt) successfully submitted. Receipt: # 527-1 ----- Attempting Submission 2 (Fri Apr 07 18:48:04 GMT 2017) ----- HST Phase I Proposal 527 (Planckarc_cycle25.apt) successfully submitted. Receipt: # 527-2 ----- Attempting Submission 3 (Fri Apr 07 19:15:17 GMT 2017) ----- HST Phase I Proposal 527 (Planckarc_cycle25.apt) successfully submitted. Receipt: # 527-3 ----- Attempting Submission 4 (Fri Apr 07 21:02:14 GMT 2017) ----- HST Phase I Proposal 527 (Planckarc_cycle25.apt) successfully submitted. Receipt: # 527-4 ----- Attempting Submission 5 (Fri Apr 07 21:20:26 GMT 2017) ----- Added Visit 06 as a replacement for Visit 02 which failed due to Gyro 3 issues. 1360770955 ----- Attempting Submission 1 (Wed Jul 19 23:01:05 GMT 2017) ----- ----- Attempting Submission 2 (Wed Mar 27 16:11:34 GMT 2019) ----- A high-definition study of the brightest lensed galaxy in the universe We propose ACS/WFC3 broad-band and medium-band imaging and WFC3/IR grism spectroscopy of a uniquely bright (R=17.8) star forming galaxy at z=2.37. This target is likely to be the brightest lensed galaxy that will ever be discovered. The galaxy is gravitationally lensed into a 55" long arc, with a total magnification factor most likely in excess of 50x. The proposed observations will be used to construct a lensing mass model to precisely measure the lensing magnification at each location along the arc. This will allow us to probe the spectral energy distributions, star formation rates, metallicities and ionization parameters of individual star forming regions, while also mapping the relative distribution of Lya emission and stellar UV continuum on scales down to <100 pc. The spatial resolution of HST is required to reveal the unprecented amount of information available for a galaxy seen at the star-formation peak epoch of the universe. We need 5 orbits of broad-band imaging, 5 orbits of grism spectroscopy, and 4 orbits of F410M medium band imaging. Update 03/27/19: Visit 06 is added as a replacement for failed visit 02. Visit 1: ACS/WFC imaging. This is programmed as a 2-orbit visit in the F814W filter. A total of 8 frames are taken per filter, four per orbit with a gap-crossing dither step between two pairs of frames in each orbit and a larger 8" offset between the two orbits using POS TARG. The ORIENT ranges are constrained to avoid having the extended main target straddle the gap between the ACS chips. Visit 2: WFC3/UVIS and WFC3/IR imaging. The first two orbits are in the UVIS channel using the F555W filter. In a similar strategy as for the ACS imaging in visit 1, a total of 8 frames are taken in this filter, four per orbit with gap-crossing dithers and POS TARG offsets between the two orbits. The third orbit is dedicated to WFC3-IR imaging in two filters, following the strategy of similar observations in program GO13003 and GO13337. A total of 8 exposures are made - 4 per filter with small box dithers for PSF reconstruction. Again, the ORIENT ranges are constrained to avoid having the target straddle the gap between the WFC3/UVIS chips. Visit 3: F410M WFC3/UVIS imaging in 4 different dither positions, one position per orbit for a total of 4 orbits. Exposure times are kept long due to the narrower bandpass of the F410M filter and to limit postflash to 1 second. As for the other imaging, the ORIENT ranges are constrained to avoid having the target straddle the gap between the WFC3/UVIS chips. A dither line pattern spanning multiple orbits is employed to cover the gap between the chips. Visit 4 and 5: Grism spectroscopy. We adapt the strategy of 3D-HST. We adopt the 3D-HST four point dithering strategy to enable 2x2 interlacing, using POS TARG to specify the dither offsets. For the 3 orbit grism observations (Visit 5), we repeat the first 2 dither positions but with a one pixel offset in each of x and y, for increased robustness to bad pixels. We choose two orients to work around contamination from cluster galaxies and field stars. The ORIENTS are highly constrained, because the lensed galaxy is curved and extended, we want to maximise the resolution by dispersing perpendicular to the long axes of the two brightest segments of the arc. In addition, we need to avoid dispersed emission from cluster galaxies and field stars. This results in tight scheduling constraints, but these observations *are schedulable* and the visits only 2 and 3 orbits long, respectively. In the event of severe scheduling conflicts with other programs during the visibility periods, we may relax these ORIENT constraints if necessary. Visit 6 is a copy of Visit 2 which failed due to Gyro 3 issues. Galaxies and the IGM 6 false false false false false false false SUPPORTED GALAXY EMISSION LINE NEBULA GRAVITATIONAL LENS HIGH REDSHIFT GALAXY STAR FORMING REGION STARBURST J2000 J2000 R=17.82, z=17.38, J=16.75, Ks=15.43 (Vega) GALAXY EMISSION LINE NEBULA GRAVITATIONAL LENS HIGH REDSHIFT GALAXY STAR FORMING REGION STARBURST J2000 J2000 R=17.82, z=17.38, J=16.75, Ks=15.43 (Vega) WFC3/IR Imaging No No F105W WFC3/IR Imaging No No F140W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F410M WFC3/IR Spectroscopic No No G141 WFC3/IR Imaging No No F140W WFC3/IR Spectroscopic No No G141 WFC3/IR Imaging No No F140W POS-TARG DITHER 0.265 LINE 5.011 false false 69.05 4 20.67 ACS-WFC-DITHER-BOX 1 false POS-TARG DITHER 0.173 LINE 2.500 false false 81.785 4 23.884 WFC3-UVIS-DITHER-BOX 2 false POS-TARG DITHER 0.173 LINE 2.4 false false 81.785 4 23.884 WFC3-UVIS-DITHER-BOX 3 false POS-TARG DITHER 0.262 LINE 5.11 false false 68.14 4 18.39 ACS-WFC-DITHER-BOX 4 false POS-TARG DITHER 0.572 LINE 0.365 false false 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 5 false POS-TARG DITHER 2.5 LINE false false 4 46.84 WFC3-UVIS-DITHER-LINE 6 false The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. 1519253570000 280.0 (Tic-Visit :proposal-id 15101 :visit-id "01" :proposal-version -1 :trans-version "20170613" :date "20-Jul-2017 00:33:53.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 2273792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15101 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15101 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3244 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3579 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15101 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3354 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3579 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. 1552334293000 278.0 (Tic-Visit :proposal-id 15101 :visit-id "02" :proposal-version -1 :trans-version "20170613" :date "19-Jul-2017 23:23:52.0" :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 4399040 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15101 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15101 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3244 :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 3579 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15101 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3356 :al-overhead-at-end 116 :internal-dur-at-end 383 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3579 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15101 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2976 :al-overhead-at-end 0 :internal-dur-at-end 652 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3579 :pcs-gap 0 ) true 3 0 The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. /Users/hdahle/Documents/OP-cache/15101_PhaseII_updated2703_2019-v06.xml (Tic-Visit :proposal-id 15101 :visit-id "06" :proposal-version -1 :trans-version "20181130" :date "27-Mar-2019 16:54:17.0" :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 4399040 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15101 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15101 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3184 :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 3519 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15101 :visit-id "06" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3216 :al-overhead-at-end 116 :internal-dur-at-end 383 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3519 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15101 :visit-id "06" :orbit-number 3 :pcs-time 302 :si-vis-utilization 2976 :al-overhead-at-end 0 :internal-dur-at-end 652 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3519 :pcs-gap 0 ) true 3 0 The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15101 :visit-id "03" :proposal-version -1 :trans-version "20170613" :date "19-Jul-2017 23:23:53.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15101 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15101 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3246 :al-overhead-at-end 119 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3579 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15101 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3357 :al-overhead-at-end 119 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3579 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15101 :visit-id "03" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3357 :al-overhead-at-end 119 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3579 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15101 :visit-id "03" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3357 :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 3579 :pcs-gap 0 ) true 4 0 The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15101 :visit-id "04" :proposal-version -1 :trans-version "20170613" :date "19-Jul-2017 23:23:54.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1636416 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15101 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15101 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3236 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3579 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15101 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3286 :al-overhead-at-end 0 :internal-dur-at-end 348 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3579 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15101 :visit-id "05" :proposal-version -1 :trans-version "20170613" :date "20-Jul-2017 00:33:55.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 2472016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15101 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15101 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3236 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3579 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15101 :visit-id "05" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3286 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3579 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15101 :visit-id "05" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3285 :al-overhead-at-end 0 :internal-dur-at-end 728 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3579 :pcs-gap 0 ) true 3 0