0 Assigned ID: 1038 ----- Attempting Submission 1 (Fri Feb 22 17:47:29 GMT 2013) ----- HST Phase I Proposal 1038 (proposal.pdf.apt) successfully submitted. The guide star reacquistion failed in the 2nd orbit of Visit 03. Following a HOPR, an additional orbit was allocated to replace the lost exposures. This has been added as Visit 06 in this resubmission. The roll angle is requested to be the same as in Visit 03, and the pos targ offsets correspond to the second point in the box dither pattern that was lost. -694453399 ----- Attempting Submission 1 (Wed Jun 26 10:34:53 GMT 2013) ----- HST Phase II Proposal 13295 (p2proposal.apt) successfully submitted. ----- Attempting Submission 2 (Wed Jan 15 14:45:43 GMT 2014) ----- Do the globular clusters in the Fornax dSph have multiple stellar populations? We propose to obtain WFC3 F343N-band imaging of the four most metal-poor globular clusters (GCs) in the Fornax dwarf spheroidal galaxy. With these data, we will establish whether red giant branch (RGB) stars in the clusters show a spread in their abundances of nitrogen. This will tell us whether the Fornax GCs host multiple stellar populations, as appears to be the case in most Galactic GCs. The Fornax dSph is of special interest in this context because a very large fraction (about 20%-25%) of its metal-poor stars ([Fe/H]<-2) belong to the four most metal-poor GCs. N-body simulations suggest it is highly unlikely that a large number of field stars have been lost due to tidal interaction with the Milky Way. The GCs could therefore, at most, have been a factor of 5 more massive initially, or otherwise more metal-poor field stars should be observed. This result is in tension with some leading scenarios for the origin of multiple populations via self-enrichment in GCs, which require GCs to have been at least a factor of 10 more massive initially. It is therefore crucial to establish whether the Fornax GCs do indeed host multiple stellar populations, and in what proportion. If they do, alternative explanations for the origin of multiple populations would have to be sought, which do not require a large number of first-generation stars to have been lost from the clusters (for example, by invoking a top-heavy first-generation IMF or accretion of additional gas). If they do not, this would have the interesting consequence that GC formation in the Fornax dSph differed significantly from that in the Milky Way. Each of the four most metal-poor globular clusters in the Fornax dSph will be observed in F343N for four orbits. We will use a four-point box dither pattern (one point per orbit) with a two-point line sub-pattern (each orbit split into two exposures). Additionally, the globular cluster M15 will be observed in F343N, F555W and F814W as a calibration target. RESOLVED STELLAR POPULATIONS Default false false false false false SUPPORTED STELLAR CLUSTER GLOBULAR CLUSTER This object was generated by the targetselector and retrieved from the NED database. J2000 J2000 STELLAR CLUSTER GLOBULAR CLUSTER This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STELLAR CLUSTER GLOBULAR CLUSTER This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STELLAR CLUSTER GLOBULAR CLUSTER This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STELLAR CLUSTER GLOBULAR CLUSTER This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 WFC3/UVIS Imaging No No F343N WFC3/UVIS Imaging No No F343N WFC3/UVIS Imaging No No F343N WFC3/UVIS Imaging No No F343N WFC3/UVIS Imaging No No F343N WFC3/UVIS Imaging No No F814W POS-TARG DITHER DITHER 2 0.173 WFC3-UVIS-DITHER-LINE 0.112 false false 81.785 0.145 4 23.884 POS-TARG BOX 46.84 2 true POS-TARG DITHER 0.145 LINE false false 2 46.84 WFC3-UVIS-DITHER-LINE 3 false POS-TARG DITHER 0.145 LINE false false 2 46.84 WFC3-UVIS-DITHER-LINE 4 false The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13295 :visit-id "01" :proposal-version -1 :trans-version "20130502" :date "13-Jun-2013 13:43:19.0" :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 2309952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13295 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13295 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2934 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13295 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3044 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13295 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3044 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13295 :visit-id "01" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3044 :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 3267 :pcs-gap 0 ) true 4 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. 1384589180000 13.818196953914594 (Tic-Visit :proposal-id 13295 :visit-id "02" :proposal-version -1 :trans-version "20130502" :date "13-Jun-2013 13:43:25.0" :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 2309952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13295 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13295 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2934 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13295 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3044 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13295 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3044 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13295 :visit-id "02" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3044 :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 3267 :pcs-gap 0 ) true 4 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. 1388818806000 69.12935126146229 (Tic-Visit :proposal-id 13295 :visit-id "03" :proposal-version -1 :trans-version "20131031" :date "15-Jan-2014 15:37:30.0" :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 2309952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13295 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13295 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2934 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13295 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3044 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13295 :visit-id "03" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3044 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13295 :visit-id "03" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3044 :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 3267 :pcs-gap 0 ) false 4 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. 1393208500000 96.95750054456028 (Tic-Visit :proposal-id 13295 :visit-id "04" :proposal-version -1 :trans-version "20130502" :date "13-Jun-2013 13:43:30.0" :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 2309952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13295 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13295 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2934 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13295 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3044 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13295 :visit-id "04" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3044 :al-overhead-at-end 122 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13295 :visit-id "04" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3044 :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 3267 :pcs-gap 0 ) true 4 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. 1378044143000 137.46579006109522 (Tic-Visit :proposal-id 13295 :visit-id "05" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 12:01:20.0" :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 1732480 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13295 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13295 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2819 :al-overhead-at-end 125 :internal-dur-at-end 352 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. HOPR repeat of 2nd orbit from Visit 03 (Tic-Visit :proposal-id 13295 :visit-id "06" :proposal-version -1 :trans-version "20131031" :date "14-Jan-2014 15:10:43.0" :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 577488 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13295 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13295 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2922 :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 3267 :pcs-gap 0 ) false 1 0