0 Assigned ID: 836 ----- Attempting Submission 1 (Fri Apr 11 21:11:35 GMT 2014) ----- Hi Kai, I have made all your recommended changes. I could not confirm whether or not the pos-targ put the target in the sweet spot in quadrant C that you had recommened - could you please double-check that? Thanks, Mansi 2107925205 ----- Attempting Submission 1 (Thu Jul 24 16:10:59 GMT 2014) ----- ----- Attempting Submission 3 (Fri Sep 12 18:35:36 GMT 2014) ----- Testing a Globular Cluster Origin for Elusive Calcium-rich Gap Transients The advent of wide-field synoptic surveys has re-invigorated time domain astronomy. The six magnitude luminosity gap between novae and supernovae is now bridged with multiple classes of explosions that are rarer, fainter and faster than supernovae. Here, we discuss an emerging class of transients with the unique property of a small amount of ejecta dominated by Calcium. The members of this class are located in the middle of nowhere in intra-group/intra-cluster environments, offset by tens of kiloparsec from their putative host galaxy. No single model can yet explain all the observables of "Calcium-rich Gap" transients. The location distribution is inconsistent with stellar mass and yet, strikingly consistent with globular clusters. It has been speculated that the high stellar density in globulars leads to peculiar transients. Thus, we propose to use 4 HST orbits to test a globular cluster origin for these elusive Calcium-rich transients. We would like to obtain deep imaging in one filter for two point source targets: SN2005E and PTF11kmb. We will be using the WFC3/UVIS/F606W setup. We selected the four point dither pattern so that the co-added exposure will be free of radiation hits and would have adequate sub-pixel sampling. Running the ETC, we need a depth of V=29 which requires 5531s at an optiumum SNR=5. Using a four-point dither pattern, and including overheads, this requires a total of two orbits for each target as the visibility per orbit is 54 min. We have no scheduling constraints as we are looking for the quiescent counterpart to these Calcium-rich transients. RESOLVED STELLAR POPULATIONS Default false false false false false SUPPORTED EXT-STAR SUPERNOVA J2000 J2000 EXT-STAR SUPERNOVA J2000 J2000 WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F606W POS-TARG DITHER 0.135 LINE false false 3 46.84 WFC3-UVIS-DITHER-LINE-3PT 1 false The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. /private/var/folders/8t/mryh79w57pxd51n8v749_y980000gn/T/OPVisit771579448076772463.xml (Tic-Visit :proposal-id 13867 :visit-id "03" :proposal-version -1 :trans-version "20140605" :date "12-Sep-2014 11:30:11.0" :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 1732464 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13867 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13867 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2889 :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 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13867 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3000 :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 3222 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. /private/var/folders/8t/mryh79w57pxd51n8v749_y980000gn/T/OPVisit2425274633604920971.xml (Tic-Visit :proposal-id 13867 :visit-id "04" :proposal-version -1 :trans-version "20140605" :date "12-Sep-2014 11:30:12.0" :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 1732464 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13867 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13867 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2943 :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 3278 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13867 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3054 :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 3278 :pcs-gap 0 ) true 2 0