A BULLET-LIKE CLUSTER AT REDSHIFT 1

Science Keywords: Select from 2 to 5 items. Science Keywords is a required field. The total number of Primary Orbits used in all Cycles must equal the total number of Primary Orbits specified on all the Observations. (Compare totals reported on the first and second pages of the PDF Preview.) This target is not used in this proposal. At least one observation must be specified 0 Assigned ID: 1134 ----- Attempting Submission 1 (Wed Aug 19 13:47:55 GMT 2020) ----- Joint Chandra/HST Change to no-orient requirement, Which open the window to schedulle all ACS visits with the roll-angle 162-171 and offer a guide stars for all the visits. 1969659896 ----- Attempting Submission 1 (Thu Sep 17 02:59:43 GMT 2020) ----- HST Phase II Proposal 16425 successfully submitted. Receipt: # 16425-1 ----- Attempting Submission 2 (Fri Sep 18 13:29:45 GMT 2020) ----- ----- Attempting Submission 3 (Tue Sep 22 14:50:56 GMT 2020) ----- ----- Attempting Submission 4 (Mon Jan 11 10:08:53 GMT 2021) ----- A BULLET-LIKE CLUSTER AT REDSHIFT 1 We propose observation of SPT-CL J0356-5337, a bullet-like cluster candidate at z~1, in order to identify the multiple centers of X-Ray emission from the ICM. The configuration of this cluster shows two massive components at the cluster core, separated by 172kpc. One component is dominated by the BCG, whereas the other hosts a group of eight galaxies within 60kpc. Merger events happen on short timescales relative to the lifetime of the cluster; therefore only a handful of clusters have been observed yet, mainly at lower z. Combined with HST data we can constrain both the hot gas and the dark matter potential using strong and weak lensing. Studying such rare high redshift cluster brings more insight into our distant universe in preparation for future X-ray observatories. We request 8 orbits of HST observations. We request 6 orbits with the ACS camera. We will observe a mosaic of three overlapping ACS pointings with two different orientation angles each, yielding an approximately circular sky coverage in combination (with increased depth in the center). We will use CVZ opportunities to benefit from their increased orbital visibilty. Each of the 6 visits of this mosaic will be splitted between the two filters F606W and F814W. Our analysis relies on the best signal-to-noise ratio possible in the F606W band to measure the shapes of the galaxies. Therefore, we request that the F606W exposures are taken approximately during the dark half of the orbit, minimizing Earthshine. The other half will be observed in F814W. During the additional 2 orbits we will obtain WFC3/IR imaging of the cluster core, split between F110W and F160W to obtain colors for the strong lensing analysis and to identify candidates for high-z dropouts. na Galaxies 6 false false false false false false false SUPPORTED CLUSTER OF GALAXIES GRAVITATIONAL LENS HIGH REDSHIFT CLUSTER This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F814W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F110W POS-TARG DITHER 3.034 LINE false false 4 85.29 ACS-WFC-DITHER-LINE 1

false

POS-TARG DITHER DITHER 2 5.183 WFC3-IR-DITHER-LINE false false 0.636 2 41.859 POS-TARG WFC3-IR-DITHER-BLOB 41.788 2

true

1610359499112 Hst Same orient constraint links visits (03 04 05) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. /private/var/folders/q7/0dt2bc197t7ffkc85bkkxg0h3cv2qr/T/OPVisit17174830380613550996.xml (Tic-Visit :proposal-id 16425 :visit-id "03" :proposal-version -1 :trans-version "20200619" :date "11-Jan-2021 11:04:58.0" :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 2273792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16425 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 16425 :visit-id "03" :orbit-number 1 :pcs-time 383 :si-vis-utilization 4983 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) true 1 0 1610359500387 Hst Same orient constraint links visits (03 04 05) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. /private/var/folders/q7/0dt2bc197t7ffkc85bkkxg0h3cv2qr/T/OPVisit1460701329168378832.xml (Tic-Visit :proposal-id 16425 :visit-id "04" :proposal-version -1 :trans-version "20200619" :date "11-Jan-2021 11:04:59.0" :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 2273792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16425 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 16425 :visit-id "04" :orbit-number 1 :pcs-time 383 :si-vis-utilization 4983 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) true 1 0 1610359501646 Hst Same orient constraint links visits (03 04 05) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. /private/var/folders/q7/0dt2bc197t7ffkc85bkkxg0h3cv2qr/T/OPVisit4309117650027554618.xml (Tic-Visit :proposal-id 16425 :visit-id "05" :proposal-version -1 :trans-version "20200619" :date "11-Jan-2021 11:05:01.0" :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 2273792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16425 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 16425 :visit-id "05" :orbit-number 1 :pcs-time 383 :si-vis-utilization 4863 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) true 1 0 1610359502733 Hst Same orient constraint links visits (06 07 08) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. /private/var/folders/q7/0dt2bc197t7ffkc85bkkxg0h3cv2qr/T/OPVisit11025960195953397763.xml (Tic-Visit :proposal-id 16425 :visit-id "06" :proposal-version -1 :trans-version "20200619" :date "11-Jan-2021 11:05:02.0" :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 2273792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16425 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 16425 :visit-id "06" :orbit-number 1 :pcs-time 383 :si-vis-utilization 4983 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) true 1 0 1610359503830 Hst Same orient constraint links visits (06 07 08) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. /private/var/folders/q7/0dt2bc197t7ffkc85bkkxg0h3cv2qr/T/OPVisit2628948375535537016.xml (Tic-Visit :proposal-id 16425 :visit-id "07" :proposal-version -1 :trans-version "20200619" :date "11-Jan-2021 11:05:03.0" :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 2273792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16425 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 16425 :visit-id "07" :orbit-number 1 :pcs-time 383 :si-vis-utilization 4983 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) true 1 0 1610359504890 Hst Same orient constraint links visits (06 07 08) The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. /private/var/folders/q7/0dt2bc197t7ffkc85bkkxg0h3cv2qr/T/OPVisit36166641024518543.xml (Tic-Visit :proposal-id 16425 :visit-id "08" :proposal-version -1 :trans-version "20200619" :date "11-Jan-2021 11:05:04.0" :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 2273792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16425 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :cvz T :proposal-id 16425 :visit-id "08" :orbit-number 1 :pcs-time 383 :si-vis-utilization 4863 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 0 :low-sky "N" :pcs-visibility 0 :pcs-gap 0 ) true 1 0 1610359505932 The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. /private/var/folders/q7/0dt2bc197t7ffkc85bkkxg0h3cv2qr/T/OPVisit8700552971403822854.xml (Tic-Visit :proposal-id 16425 :visit-id "11" :proposal-version -1 :trans-version "20200619" :date "11-Jan-2021 11:05:05.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 2019440 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16425 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16425 :visit-id "11" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2882 :al-overhead-at-end 0 :internal-dur-at-end 633 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) true 1 0 1610359506901 The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. /private/var/folders/q7/0dt2bc197t7ffkc85bkkxg0h3cv2qr/T/OPVisit49989221636637614.xml (Tic-Visit :proposal-id 16425 :visit-id "12" :proposal-version -1 :trans-version "20200619" :date "11-Jan-2021 11:05:06.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 2019440 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16425 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16425 :visit-id "12" :orbit-number 1 :pcs-time 383 :si-vis-utilization 2882 :al-overhead-at-end 0 :internal-dur-at-end 633 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) true 1 0