0 Assigned ID: 4894 ----- Attempting Submission 1 (Tue Aug 22 11:21:01 GMT 2023) ----- HST Phase I Proposal 4894 successfully submitted. Receipt: # 4894-1 Moves the F775W pointing position to the SE to avoid generating a Dragon's Breath feature, like in the existing archial image. Moved the 2x2 F606W mosaic to the south to avoid the same type of feature in the western pointing. 168708559 ----- Attempting Submission 1 (Thu Oct 05 21:12:36 GMT 2023) ----- ----- Attempting Submission 2 (Thu Nov 09 01:40:25 GMT 2023) ----- A Newly Identified Merging Cluster Near Pericenter We have identified a massive cluster ACT-CL J0034.3+0225 at a redshift of 0.388 in the midst of a major merger and close to pericenter crossing based on an archival Chandra observation from Cycle 18. This proposal requests time for a much deeper Chandra observation to better define the cluster's morphology, to measure temperature differences within the core, and to search for shocks and cold fronts. This proposal also requests 5 HST orbits with the ACS/WFC for a gravitational lensing analysis to determine the distribution of total cluster mass for comparison to the gas and galaxies with the goal of setting constraints on the interaction properties of the dark matter, determining the properties of the merger, and studying the shocks and cold fronts in this cluster Our award of 5 HST orbits will use the ACS/WFC to image the full cluster extent out to 1 Mpc (roughly R500) in the F606W filter using a 2x2 mosaic. This will utilize 4 orbits which have an ORIENT constraint to "|avoid contaminating the central region of the cluster by diffraction spikes from the bright star toward the northwest."| The remaining orbit will be used to image the cluster core in the F775W filter also with an ORIENT constraint to match "the existing F814W image to maximize the overlap of HST imaging in the cluster center." In each orbit we will obtain an image through a single filter using a 4-point dither pattern that provides optimal coverage of the central chip gap area, while allowing for efficient cosmic-ray rejection. Review of the visit planner output indicates that a +/-1 deg tolerance on the ORIENT of the F775W image allows for good visibiity. For the 2x2 mosaic pointing, posiitons were genrated iteratively to ensure there were no gaps in coverage across the full mosaic. An ORIENT of 47.5 deg provided a decent visibiity window. n/a Large Scale Structure of the Universe 6 false false false false false false false false SUPPORTED CLUSTER OF GALAXIES GRAVITATIONAL LENS RICH CLUSTER YES This position was selcted to match the previous F814W image of this cluster. J2000 J2000 CLUSTER OF GALAXIES GRAVITATIONAL LENS RICH CLUSTER YES This position was entered by hand for the western field of the mosaic. J2000 CLUSTER OF GALAXIES GRAVITATIONAL LENS RICH CLUSTER YES This position was entered by hand for the southern field of the mosaic. J2000 CLUSTER OF GALAXIES GRAVITATIONAL LENS RICH CLUSTER YES This position was entered by hand for the eastern field of the mosaic. J2000 CLUSTER OF GALAXIES GRAVITATIONAL LENS RICH CLUSTER YES This position was entered by hand for the northern field of the mosaic. J2000 ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F775W POS-TARG DITHER 2.276 LINE false false 4 85.29 ACS-WFC-DITHER-LINE 2 false POS-TARG DITHER 5.943 LINE 3.077 false false 166.993 4 91.429 ACS-WFC-DITHER-BOX 3 false The scheduling data was generated by CASM 31.1. CASM was run in Phase II mode. /Users/jph/Proposals/Chandra/Cycle25/J0034/HST/OP-cache/HST_PhaseII_Proposal_j0034_ver2sub-v01.xml (Tic-Visit :proposal-id 17579 :visit-id "01" :proposal-version -1 :trans-version "20230626" :date "08-Nov-2023 20:30:22.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 1136896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17579 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17579 :visit-id "01" :orbit-number 1 :pcs-time 291 :si-vis-utilization 2843 :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 3136 :pcs-gap 0 ) true 1 0 Hst Same orient constraint links visits (02 03 04 05) The scheduling data was generated by CASM 31.1. CASM was run in Phase II mode. /Users/jph/Proposals/Chandra/Cycle25/J0034/HST/OP-cache/HST_PhaseII_Proposal_j0034_ver2sub-v02.xml (Tic-Visit :proposal-id 17579 :visit-id "02" :proposal-version -1 :trans-version "20230626" :date "08-Nov-2023 20:29:17.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 1136896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17579 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17579 :visit-id "02" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2752 :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 3136 :pcs-gap 0 ) true 1 0 Hst Same orient constraint links visits (02 03 04 05) The scheduling data was generated by CASM 31.1. CASM was run in Phase II mode. /Users/jph/Proposals/Chandra/Cycle25/J0034/HST/OP-cache/HST_PhaseII_Proposal_j0034_ver2sub-v03.xml (Tic-Visit :proposal-id 17579 :visit-id "03" :proposal-version -1 :trans-version "20230626" :date "08-Nov-2023 20:29:18.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 1136896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17579 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17579 :visit-id "03" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2752 :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 3136 :pcs-gap 0 ) true 1 0 Hst Same orient constraint links visits (02 03 04 05) The scheduling data was generated by CASM 31.1. CASM was run in Phase II mode. /Users/jph/Proposals/Chandra/Cycle25/J0034/HST/OP-cache/HST_PhaseII_Proposal_j0034_ver2sub-v04.xml (Tic-Visit :proposal-id 17579 :visit-id "04" :proposal-version -1 :trans-version "20230626" :date "08-Nov-2023 20:29:18.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 1136896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17579 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17579 :visit-id "04" :orbit-number 1 :pcs-time 291 :si-vis-utilization 2752 :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 3136 :pcs-gap 0 ) true 1 0 Hst Same orient constraint links visits (02 03 04 05) The scheduling data was generated by CASM 31.1. CASM was run in Phase II mode. /Users/jph/Proposals/Chandra/Cycle25/J0034/HST/OP-cache/HST_PhaseII_Proposal_j0034_ver2sub-v05.xml (Tic-Visit :proposal-id 17579 :visit-id "05" :proposal-version -1 :trans-version "20230626" :date "08-Nov-2023 20:29:19.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 1136896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17579 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17579 :visit-id "05" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2752 :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 3136 :pcs-gap 0 ) true 1 0