16429( 2) - 18-Sep-2020 23:40:35 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16429 Version: 2 Check-in Time: 18-Sep-2020 23:40:35 STScI Edit Number: 0 Title A candidate bullet in the Planck SZ Catalogue ------------------------------------------------------------------------------------ Type Cycle GO 28 ------------------------------------------------------------------------------------ Investigators Contact? PI: Mariachiara Rossetti INAF, Instituto di Astrofisica Spaziale e Y Fisica, Milano CoI: Dr. Fabio Gastaldello INAF, Milan N CoI: Gael Foex Universidad de Valparaíso, Instituto de N Física y Astronomia CoI: Dr. Claudio Grillo University of Milan N CoI: Dr. Silvano Molendi INAF - IASF Milano N CoI: Dr. Mario Nonino INAF, Osservatorio Astronomico di Trieste N CoI: Dr. Marisa Girardi Universita degli Studi di Trieste N CoI: Walter Boschin INAF, Osservatorio Astronomico di Trieste N CoI: Dr. Jean-Baptiste Melin Commissariat a l'Energie Atomique (CEA) N CoI: Simona Ghizzardi INAF, Instituto di Astrofisica Spaziale e N Fisica, Milano CoI: Sabrina De Grandi INAF, Osservatorio Astronomico di Brera, N Merate CoI: Dr. Dan Coe Space Telescope Science Institute - ESA N CoI: Dr. Adi Zitrin Ben Gurion University of the Negev N CoI: Massimo Gaspari Princeton University N CoI: Dr. Iacopo Bartalucci Commissariat a l'Energie Atomique (CEA) N CoI: Dr. Larry Bradley Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract We propose joint Chandra (146 ks) and HST (5 orbits) observations of PSZ2 G282.28+49.94, a candidate ``bullet-like" cluster. It features a cometary shape and a very large offset (350 kpc) between the X-ray peak and a galaxy clump, suggesting that it is undergoing a major merger shortly after core passage. In this phase, the collisionless components of the cluster are maximally separated from the collisional ICM, as in the Bullet Cluster, and their separation can provide constraints to the DM cross section. The large separation makes PSZ2 G282.28+49.94 a very promising target for these studies. The requested observations will allow us to map both the ICM and the DM distribution, to infer the dynamical history of this extreme object and to measure the offset between DM, gas and galaxies. ------------------------------------------------------------------------------------ Observations Description ------------------------ We're doing a 2x2 mosaic with ACS F814W (for weak lensing) + a central pointing of F435W. Each ACS pointing will be 1 orbit with 4 dithers stepping across the chip gap. These will complement the archival half-orbit snapshot in WFC3/IR F110W and F140W (706 s each; PI Ebeling; GO 15132). 16429( 2) - 18-Sep-2020 23:40:35 - [ 2] ------------------------------------------------------------------------------------ 16429( 2) - 18-Sep-2020 23:40:35 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 PSZ1-G282.30 CLUSTER OF GALAXIES, RA=11H58M0.8013S, J2000 V = 18 +49.92 GRAVITATIONAL LENS, DEC=-10D46'31.98" RICH CLUSTER Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 16429( 2) - 18-Sep-2020 23:40:35 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 3.034 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.29 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 16429( 2) - 18-Sep-2020 23:40:35 - [ 5] Visit: 01 (F435W central pointing) Visit Requirements: SAME ORIENT AS 02 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PSZ1-G282.3 ACS/WFC ACCUM WFCENTER F435W 1 0 S PATTERN 1 1 0+49.92 see below (2058 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F435W 1 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F435W 2 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F435W 3 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F435W 4 none none none 1 514.5 S 16429( 2) - 18-Sep-2020 23:40:35 - [ 6] Visit: 02 (F814W) Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PSZ1-G282.3 ACS/WFC ACCUM WFCENTER F814W 1 0 S POS TARG 0+49.92 see below -91.08181394818979, (2058 S) -100.28510583569366; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 1 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 2 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 3 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 4 none none none 1 514.5 S 16429( 2) - 18-Sep-2020 23:40:35 - [ 7] Visit: 03 (F814W) Visit Requirements: SAME ORIENT AS 02 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PSZ1-G282.3 ACS/WFC ACCUM WFCENTER F814W 1 0 S POS TARG 0+49.92 see below 92.72000007374032, (2058 S) -87.43243095170607; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 1 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 2 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 3 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 4 none none none 1 514.5 S 16429( 2) - 18-Sep-2020 23:40:35 - [ 8] Visit: 04 (F814W) Visit Requirements: SAME ORIENT AS 02 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PSZ1-G282.3 ACS/WFC ACCUM WFCENTER F814W 1 0 S POS TARG 0+49.92 see below -92.72000007374032, (2058 S) 87.4324309517061; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 1 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 2 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 3 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 4 none none none 1 514.5 S 16429( 2) - 18-Sep-2020 23:40:35 - [ 9] Visit: 05 (F814W) Visit Requirements: SAME ORIENT AS 02 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PSZ1-G282.3 ACS/WFC ACCUM WFCENTER F814W 1 0 S POS TARG 0+49.92 see below 91.08181394818979, (2058 S) 100.28510583569368; PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 1 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 2 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 3 none none none 1 514.5 S PSZ1-G282.30+49.92 1 ACS/WFC ACCUM WFCENTER F814W 4 none none none 1 514.5 S 16429( 2) - 18-Sep-2020 23:40:35 - [ 10] Summary Form for Proposal 16429 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFCENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, POS TARG -91.08181394818979, -100.28510583569366, POS TARG -92.72000007374032, 87.4324309517061, POS TARG 91.08181394818979, 100.28510583569368, POS TARG 92.72000007374032, -87.43243095170607, SAME ORIENT AS 02 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F435W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names PSZ1-G282.30+49.92 ------------------------------------------------------------------------------------------------------------------------------------