0 Assigned ID: 741 ----- Attempting Submission 1 (Fri Apr 08 19:47:57 GMT 2016) ----- The number of orbits used exceeds the number allocated Used APT v26.2.2 to account for the longer guide star acquisition, this time for all visits (previous submission was only for Visit 03). 12/16/19 - ROYLE - Added visit 52 as duplicate of visit 02 affected by telescope lock-up -1780780149 ----- Attempting Submission 1 (Fri Jul 15 14:45:18 GMT 2016) ----- ----- Attempting Submission 2 (Tue Jul 19 14:34:45 GMT 2016) ----- ----- Attempting Submission 3 (Tue Jul 31 15:05:07 GMT 2018) ----- ----- Attempting Submission 4 (Tue Dec 11 17:25:41 GMT 2018) ----- ----- Attempting Submission 5 (Thu Dec 13 15:41:57 GMT 2018) ----- ----- Attempting Submission 6 (Mon Dec 16 16:51:07 GMT 2019) ----- In-house processing Proper Motions of the Crater-Leo Group: Testing the Group Infall Scenario While substantial progress has been made in studying the dynamical properties of individual Milky Way (MW) satellites, groups of satellites have gained much interests only recently although such groups have long been predicted by cosmological simulations. Testing the picture of group infall requires the identification of candidate systems and measurement of their full 6D phase-space coordinates to assess the validity of a common orbital history. The Crater-Leo group of MW satellites (Crater 1/2, Leo II, IV, and V) constitute the best such candidates. Their numbers, positions, distances, line-of-sight velocities, and star formation histories (SFHs) are all indicative of a common origin. However, proper motion (PM) is the one key ingredient missing to study these valuable objects in great detail. Leo II has existing multi-epoch data in the archive and Leo IV will soon have PMs from our ongoing HST program. We propose to measure the PMs of the other 3 objects that belong to the Crater-Leo Group: Crater 1/2 and Leo V. These PMs will allow us to definitively confirm or rule out associations. There is a high chance that our measurements will identify the first known group of low-mass MW satellites, a key milestone towards ratifying LCDM theory. This finding will revolutionize research in near field cosmology by allowing to study the formation histories of dwarf galaxy having originated from, and interacted with, the same group environment. Regardless of the outcome, the newly defined orbits of these systems will furthermore place powerful constraints on the potential of the MW halo at distances where few probes exist. In Cycle 24, we will obtain first-epoch images for the two galaxies Crater 2 and Leo V. The deep F606W and F814W observations will allow us to create astrometric/photometric catalogs, construct CMDs, and study SFHs of the target galaxies in detail. The final goal of this program is to measure absolute proper motions for 3 target objects: globular cluster Crater 1, and dwarf galaxies Crater 2 and Leo V. In the current Cycle 26 program (GO-15507), we will obtain second-epoch data for Crater 1, Crater 2, and Leo V. We will observe the three target objects using the F606W filter to measure proper motions. Crater 1 and 2 will observed for 3 orbits, and Leo V will be observed for 5 orbits. Each orbit will be split into one short and two long exposures. Individual exposures will be dithered via POS-TARG following a customized dithered pattern . To maximize the time baseline between exisiting first-epoch (Cycle 24) and these second-epoch observations, we added Timing Requirements for all visits. We also added Orientation Requirements for all visits to align with the first-epoch images. Stellar Populations Galaxies 0 false false false false false false false SUPPORTED STELLAR CLUSTER GLOBULAR CLUSTER J2000 GALAXY DWARF ELLIPTICAL HALO J2000 J2000 GALAXY DWARF SPHEROIDAL HALO J2000 J2000 ACS/WFC Imaging No No F606W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F814W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F814W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F814W The scheduling data was generated by CASM 26.2.2. CASM was run in Phase II mode. This is the second-epoch visit for the globular cluster Crater 1. In this visit, we will image Crater 1 using the F606W filter for both primary ACS/WFC and parallel WFC3/UVIS observations. Three orbits are required to complete this visit. Each orbit will consist of one short and two long exposures. To maximize the time baseline between the first-epoch (Nov 2014) and these second-epoch observations, we added Timing Requirements of "After 01-SEP-2019" for this visit. This will ensure that our second-epoch observations are carried as late as possible. We have also added Orient Ranges requirements to align our second-epoch images with the first-epoch ones. We implemented a custom-designed dither pattern via the POS-TARG requirement. 1576413156000 289.42 (Tic-Visit :proposal-id 15507 :visit-id "01" :proposal-version -1 :trans-version "20181130" :date "13-Dec-2018 10:29:35.0" :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 5156736 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15507 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15507 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2815 :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 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15507 :visit-id "01" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2847 :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 3149 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15507 :visit-id "01" :orbit-number 3 :pcs-time 302 :si-vis-utilization 2847 :al-overhead-at-end 0 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3149 :pcs-gap 0 ) true 3 0 The scheduling data was generated by CASM 26.2.2. CASM was run in Phase II mode. This is the second-epoch visit for the dwarf galaxy Crater 2. In this visit, we will image Crater 2 using the F606W filter for both primary ACS/WFC and parallel WFC3/UVIS observations. Three orbits are required to complete this visit. Each orbit will consist of one short and two long exposures. To maximize the time baseline between the first-epoch (Dec 2016) and these second-epoch observations, we added Timing Requirements of "After 01-SEP-2019" for this visit. This will ensure that our second-epoch observations are carried as late as possible. We have also added Orient Ranges requirements to align our second-epoch images with the first-epoch ones. We implemented a custom-designed dither pattern via the POS-TARG requirement. 1576430327000 286.81 (Tic-Visit :proposal-id 15507 :visit-id "02" :proposal-version -1 :trans-version "20181130" :date "13-Dec-2018 10:40:35.0" :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 5156720 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15507 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15507 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2823 :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 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15507 :visit-id "02" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2854 :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 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15507 :visit-id "02" :orbit-number 3 :pcs-time 302 :si-vis-utilization 2854 :al-overhead-at-end 0 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) true 3 0 This is the second-epoch visit for the dwarf galaxy Crater 2. In this visit, we will image Crater 2 using the F606W filter for both primary ACS/WFC and parallel WFC3/UVIS observations. Three orbits are required to complete this visit. Each orbit will consist of one short and two long exposures. To maximize the time baseline between the first-epoch (Dec 2016) and these second-epoch observations, we added Timing Requirements of "After 01-SEP-2019" for this visit. This will ensure that our second-epoch observations are carried as late as possible. We have also added Orient Ranges requirements to align our second-epoch images with the first-epoch ones. We implemented a custom-designed dither pattern via the POS-TARG requirement. (Tic-Visit :proposal-id 15507 :visit-id "02" :proposal-version -1 :trans-version "20181130" :date "13-Dec-2018 10:40:35.0" :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 5156720 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15507 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15507 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2823 :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 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15507 :visit-id "02" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2854 :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 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15507 :visit-id "02" :orbit-number 3 :pcs-time 302 :si-vis-utilization 2854 :al-overhead-at-end 0 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) false 3 0 The scheduling data was generated by CASM 26.2.2. CASM was run in Phase II mode. This is the second-epoch visit for galaxy LeoV. In this visit, we will image Leo V using the F606W filter for both primary ACS/WFC and parallel WFC3/UVIS observations. Five orbits are required to complete this visit. Each orbit will consist of one short and two long exposures. To maximize the time baseline between the first-epoch (Mar 2017) and these second-epoch observations, we added Timing Requirements of "After 01-SEP-2019" for this visit. This will ensure that our second-epoch observations are carried as late as possible. The Schedulability was reduced to 80 to increase the schedulable windows under the specified Orient ranges. We implemented a custom-designed dither pattern via the POS-TARG requirement. (Tic-Visit :proposal-id 15507 :visit-id "03" :proposal-version -1 :trans-version "20181130" :date "13-Dec-2018 10:04:13.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 8594560 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15507 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15507 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2640 :al-overhead-at-end 5 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2973 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15507 :visit-id "03" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2668 :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 2973 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15507 :visit-id "03" :orbit-number 3 :pcs-time 302 :si-vis-utilization 2668 :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 2973 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15507 :visit-id "03" :orbit-number 4 :pcs-time 302 :si-vis-utilization 2668 :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 2973 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15507 :visit-id "03" :orbit-number 5 :pcs-time 302 :si-vis-utilization 2668 :al-overhead-at-end 0 :internal-dur-at-end 1015 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2973 :pcs-gap 0 ) true 5 0