0 Assigned ID: 458 ----- Attempting Submission 1 (Fri Apr 08 12:07:05 GMT 2016) ----- HST Phase I Proposal 458 (LMC.apt) successfully submitted. Receipt: # 458-1 ----- Attempting Submission 2 (Fri Apr 08 17:44:42 GMT 2016) ----- HST Phase I Proposal 458 (LMCsub.apt) successfully submitted. Receipt: # 458-2 0 ----- Attempting Submission 1 (Fri Jul 15 07:25:00 GMT 2016) ----- ----- Attempting Submission 2 (Wed Nov 16 00:27:01 GMT 2016) ----- HST Phase II Proposal 14710 (14710.apt) successfully submitted. Receipt: # 14710-2 ----- Attempting Submission 3 (Wed Nov 16 00:54:45 GMT 2016) ----- Multiple Stellar Populations in Young Magellanic Cloud Clusters The finding that most intermediate-age (~1-2 Gyr old) star clusters in both Magellanic Clouds (MCs) exhibit an extended main-sequence turn off (eMSTO) has been one of the most-intriguing discoveries made by HST in the field of stellar astrophysics. A huge effort has been undertaken to understand the eMSTO but the physical mechanism that is responsible for the eMSTO is still unknown. Several authors have suggested that the eMSTO is due to an age spread of ~100-500 Myr and that the intermediate-age MC clusters are the young counterparts of the old Galactic globular clusters (GCs) with multiple populations. This scenario would imply that the eMSTO is present in massive GCs only. As an alternative, the eMSTO could be due to coeval stellar populations with different rotation rates. In that case the eMSTO should be unrelated to the mass of the host GC. Our recent discovery that three ~1-300 Myr-old LMC clusters exhibit not only an eMSTO but also a split MS may provide a new angle to investigate the multiple-population phenomenon. We propose to observe 9 GCs in the LMC and the SMC with ages between ~20 and ~600 Myr and masses between ~3,000 and 50,000 solar masses. This interval of masses and ages is almost unexplored to date. We plan to obtain deep imaging in the F336W and F814W bands. These are very efficient filters to search for eMSTOs and split MSs and to constrain the internal variation of age and/or the rotation rates of the distinct populations. Moreover, we will use the F656N filter to detect any H-alpha emission either due to pre-MS stars or fast-rotating Be-stars. We will thus understand to what extent age, rotation, and GC mass are responsible for the eMSTO. Imaging with WFC3/UVIS in F336W, F656N, F814W of star clusters in the small and the large magellanic cloud. ACS/WFC imaging in F475W and F814W of parallel fields. Stellar Populations 12 false false false false false false SUPPORTED STELLAR CLUSTER GLOBULAR CLUSTER YES This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STELLAR CLUSTER GLOBULAR CLUSTER YES This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STELLAR CLUSTER GLOBULAR CLUSTER YES This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STELLAR CLUSTER GLOBULAR CLUSTER YES This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STELLAR CLUSTER GLOBULAR CLUSTER YES This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STELLAR CLUSTER GLOBULAR CLUSTER YES This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STELLAR CLUSTER GLOBULAR CLUSTER YES This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STELLAR CLUSTER GLOBULAR CLUSTER YES This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STELLAR CLUSTER GLOBULAR CLUSTER YES This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F656N WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F656N WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F656N WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F656N WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F656N WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F656N WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F656N WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F656N WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F656N WFC3/UVIS Imaging No No F814W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F814W The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. /home/milone/OP-cache/14710-v01.xml NGC-1818 - part 1 (Tic-Visit :proposal-id 14710 :visit-id "01" :proposal-version -1 :trans-version "20160601" :date "16-Nov-2016 11:19:46.0" :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 2291888 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14710 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14710 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2698 :al-overhead-at-end 116 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3031 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. /home/milone/OP-cache/14710-v02.xml NGC-1805 - part 1 (Tic-Visit :proposal-id 14710 :visit-id "02" :proposal-version -1 :trans-version "20160601" :date "16-Nov-2016 11:22:57.0" :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 2291888 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14710 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14710 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2698 :al-overhead-at-end 116 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3031 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. /home/milone/OP-cache/14710-v03.xml NGC-330 - part 1 (Tic-Visit :proposal-id 14710 :visit-id "03" :proposal-version -1 :trans-version "20160601" :date "16-Nov-2016 11:21:14.0" :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 2291888 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14710 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14710 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2712 :al-overhead-at-end 116 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3045 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. /tmp/OPVisit4643808485363264556.xml NGC-2164 - part 1 (Tic-Visit :proposal-id 14710 :visit-id "04" :proposal-version -1 :trans-version "20160601" :date "16-Nov-2016 11:46:51.0" :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 2291888 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14710 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14710 :visit-id "04" :orbit-number 1 :pcs-time 241 :si-vis-utilization 2790 :al-overhead-at-end 116 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3031 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. /home/milone/OP-cache/14710-v05.xml NGC-1953 - part 1 (Tic-Visit :proposal-id 14710 :visit-id "05" :proposal-version -1 :trans-version "20160601" :date "16-Nov-2016 11:22:59.0" :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 4010800 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14710 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14710 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2698 :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 3031 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14710 :visit-id "05" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2809 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3031 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. /home/milone/OP-cache/14710-v06.xml NGC-294 - part 1 (Tic-Visit :proposal-id 14710 :visit-id "06" :proposal-version -1 :trans-version "20160601" :date "16-Nov-2016 11:23:01.0" :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 4010800 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14710 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14710 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2712 :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 3045 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14710 :visit-id "06" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2823 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3045 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. /home/milone/OP-cache/14710-v07.xml NGC-1868 - part 1 (Tic-Visit :proposal-id 14710 :visit-id "07" :proposal-version -1 :trans-version "20160601" :date "16-Nov-2016 11:23:03.0" :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 4010800 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14710 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14710 :visit-id "07" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2687 :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 3020 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14710 :visit-id "07" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2798 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3020 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. /home/milone/OP-cache/14710-v08.xml NGC-1801 - part 1 (Tic-Visit :proposal-id 14710 :visit-id "08" :proposal-version -1 :trans-version "20160601" :date "16-Nov-2016 11:23:05.0" :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 4010800 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14710 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14710 :visit-id "08" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2698 :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 3031 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14710 :visit-id "08" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2809 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3031 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. /tmp/OPVisit4199285842965820067.xml O-SMC104 (Tic-Visit :proposal-id 14710 :visit-id "09" :proposal-version -1 :trans-version "20160601" :date "16-Nov-2016 11:49:07.0" :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 4010800 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14710 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14710 :visit-id "09" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2712 :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 3045 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14710 :visit-id "09" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2823 :al-overhead-at-end 122 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3045 :pcs-gap 0 ) true 2 0