0 Assigned ID: 7514 ----- Attempting Submission 1 (Thu Apr 16 18:01:49 GMT 2026) ----- HST Phase I Proposal 7514 successfully submitted. Receipt: # 7514-1 FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser Diagnostic Justification: There are diagnostics at a lower level: The warning for each exposures is related to FLASH level may be too high for this exposures or a short subexposure. Based on our experience with HST data, we generally prefer higher background levels than recommended. -1402550651 ----- Attempting Submission 1 (Mon Aug 17 07:43:38 GMT 2026) ----- Diagnostic Justification: There are diagnostics at a lower level: The warning for each exposures is related to FLASH level may be too high for this exposures or a short subexposure. Based on our experience with HST data, we generally prefer higher background levels than recommended. Reconstructing the assembling history of the Large Magellanic Cloud using its system of globular clusters Globular clusters (GCs) are amongst the most powerful tracers of galaxy assembly. In our Milky Way, detailed studies of the GC kinematics, in combination with their ages and metallicities, have been transformative in our understanding of its mass assembly history, revealing the past accretion events that form the present-day Milky Way. Extending this approach to nearby dwarf galaxies is the next critical step. Thereby, the Large Magellanic Cloud (LMC), the closest example of an interacting dwarf, provides an unparalleled laboratory. Its low mass and sub-solar metallicity probe a regime of galaxy formation that remains largely unexplored. To date, HST-based studies of the chrono-dynamic structure of about half of the LMC GC population have already uncovered the existence of an accreted GC. However, the absence of comparable data for the remaining clusters currently limits any global reconstruction of the assembly history of the LMC. To complete this picture, we propose for an additional epoch of HST observations for the final eight LMC GCs. The observations will i) deliver precise proper motions to map the kinematic structure of the clusters and ii) enable the construction of a homogeneous age-metallicity relation across all clusters. Having this collection of information for the entire GC system of the LMC will allow us to trace the LMC assembly history for the first time in a self-consistent way, adding crucial contribution to our knowledge of the hierarchical assembly of dwarf galaxies. The aim of this programme is to measure the proper motions of a sample of eight ancient star clusters within the Large Magellanic Cloud. For this, we proposed one additional epoch of observations for each cluster. In total, 12 primary orbits with the WFC3/UVIS instrument are allocated to this programme. To reach our science goal, precise measurements of the stellar positions are crucial. We plan with the following observational setup: Each cluster will have one orbit of observations using the WFC3/UVIS instrument in the F606W filter. F606W provides an optimal SNR for stars in old star clusters, also its PSF is better sampled than in bluer filters. Additionally, for four clusters within our sample, namely NGC 1786, NGC 1928, NGC 1939 and NGC 2019, one orbit in the WFC3/UVIS F814W filter is allocated, since these clusters lack deep archival F814W data. The observations are organized in 1 visit for each cluster. Within each orbit, we plan for 5 properly-dithered long exposures. To measure the positions of stars that are saturated in the long exposures we further require two short exposures (one at the beginning and one at the end of the orbit). We positioned the new observations such that the overlap with existing observations is maximized. Further, we request the new observations to be taken with orientations that are perpendicular to those of the existing, archival epochs. This requirement is crucial to mitigate the impact of uncorrected CTE. The requested range of orientations is specified in the Visit Orientation Requirement for all clusters/visits. The team covers a broad area of expertise and all applicants are active researchers in their respective field. Our team has extensive experience with HST, proper motion measurements and the study of star clusters in the Magellanic Clouds. Prof. Bastian is an expert in studies of young massive clusters. He has been PI of a number of successful HST proposals on the subject. Dr. Bellini is an expert of data reduction, PSF modeling, and geometric distortions. Dr. Bellini wrote the proper-motion reduction routines for state-of-the-art HST astrometry. He is also an expert in globular-cluster stellar populations and kinematics. Dr. Cassisi is a worldwide recognized expert in stellar evolution models. Dr Gatto has a wide experience in the characterization of Magellanic Clouds star clusters, and their evolution. Dr. Kamann is experienced in combining HST catalogues with ground-based spectroscopy for the characterization of massive stellar clusters, their stellar populations, and internal kinematics. Dr. Libralato and Dr. Haeberle are experts of HST data reduction, proper-motion measurements and internal kinematics of globular clusters. Dr. Massari has expertise in the photometric and astrometric reduction of HST data, both with the ACS and the WFC3 cameras. He is expert in the use of globular clusters imaged by HST and is the PI of the "The Missing Globular Cluster Survey" (MGCS, HST Treasury Program GO-17435). He leads the project "Cluster Ages to Reconstruct the Milky-way Assembly" (CARMA), the aim of which is to determine precise and accurate age measurements for the entire system of known Galactic globular clusters (GCs) and to use them to trace the most significant merger events experienced by the Milky Way. Prof. Aguado-Agelet, Dr. Ceccarelli and Ms. Zerbinati are members of the CARMA team and have broad experience with the analysis of star clusters and isochrone fitting techniques. Dr. Niederhofer has broad expertise in proper-motion calculations and the analysis of Magellanic Cloud star clusters using HST observations. Dr. Niederhofer has led an HST programme to determine the proper motions of several star clusters within the Large Magellanic Cloud (GO-16748). Dr. Martocchia and Dr. Saracino have carried out a large number of projects on stellar clusters in the Magellanic Clouds, that required precise photometry and astrometry with HST. Stellar Populations and the Interstellar Medium 6 false false false false true false false false false false SUPPORTED 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 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 F606W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F814W /Users/florian/Proposals/HST-C34/LMC-GC-PM/Phase-II/OP-cache/18424-v01.xml The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18424 :visit-id "01" :proposal-version -1 :trans-version "20260618" :date "07-Aug-2026 15:38:38.0" :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 2021248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18424 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18424 :visit-id "01" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2820 :al-overhead-at-end 129 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3121 :pcs-gap 0 ) true 1 0 /Users/florian/Proposals/HST-C34/LMC-GC-PM/Phase-II/OP-cache/18424-v02.xml The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18424 :visit-id "02" :proposal-version -1 :trans-version "20260618" :date "07-Aug-2026 15:38:43.0" :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 2021248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18424 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18424 :visit-id "02" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2820 :al-overhead-at-end 129 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3121 :pcs-gap 0 ) true 1 0 /Users/florian/Proposals/HST-C34/LMC-GC-PM/Phase-II/OP-cache/18424-v03.xml The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18424 :visit-id "03" :proposal-version -1 :trans-version "20260618" :date "07-Aug-2026 15:38:49.0" :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 4042496 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18424 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18424 :visit-id "03" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2791 :al-overhead-at-end 129 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3092 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18424 :visit-id "03" :orbit-number 2 :pcs-time 301 :si-vis-utilization 2791 :al-overhead-at-end 129 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3092 :pcs-gap 0 ) true 2 0 /Users/florian/Proposals/HST-C34/LMC-GC-PM/Phase-II/OP-cache/18424-v04.xml The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18424 :visit-id "04" :proposal-version -1 :trans-version "20260618" :date "07-Aug-2026 15:38:57.0" :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 2021248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18424 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18424 :visit-id "04" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2791 :al-overhead-at-end 129 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3092 :pcs-gap 0 ) true 1 0 /Users/florian/Proposals/HST-C34/LMC-GC-PM/Phase-II/OP-cache/18424-v05.xml The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18424 :visit-id "05" :proposal-version -1 :trans-version "20260618" :date "07-Aug-2026 15:39:02.0" :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 4042496 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18424 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18424 :visit-id "05" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2791 :al-overhead-at-end 129 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3092 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18424 :visit-id "05" :orbit-number 2 :pcs-time 301 :si-vis-utilization 2791 :al-overhead-at-end 129 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3092 :pcs-gap 0 ) true 2 0 /Users/florian/Proposals/HST-C34/LMC-GC-PM/Phase-II/OP-cache/18424-v06.xml The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18424 :visit-id "06" :proposal-version -1 :trans-version "20260618" :date "07-Aug-2026 15:39:09.0" :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 4042496 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18424 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18424 :visit-id "06" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2791 :al-overhead-at-end 129 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3092 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18424 :visit-id "06" :orbit-number 2 :pcs-time 301 :si-vis-utilization 2791 :al-overhead-at-end 129 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3092 :pcs-gap 0 ) true 2 0 /Users/florian/Proposals/HST-C34/LMC-GC-PM/Phase-II/OP-cache/18424-v07.xml The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18424 :visit-id "07" :proposal-version -1 :trans-version "20260618" :date "07-Aug-2026 15:39:15.0" :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 2021248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18424 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18424 :visit-id "07" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2763 :al-overhead-at-end 129 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3064 :pcs-gap 0 ) true 1 0 /Users/florian/Proposals/HST-C34/LMC-GC-PM/Phase-II/OP-cache/18424-v08.xml The scheduling data was generated by CASM 34.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 18424 :visit-id "08" :proposal-version -1 :trans-version "20260618" :date "07-Aug-2026 15:39:20.0" :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 4042496 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 18424 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 18424 :visit-id "08" :orbit-number 1 :pcs-time 301 :si-vis-utilization 2820 :al-overhead-at-end 129 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3121 :pcs-gap 0 ) (Tic-Orbit :proposal-id 18424 :visit-id "08" :orbit-number 2 :pcs-time 301 :si-vis-utilization 2820 :al-overhead-at-end 129 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3121 :pcs-gap 0 ) true 2 0