14153( 4) - 20-Jul-2016 20:17:20 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14153 Version: 4 Check-in Time: 20-Jul-2016 20:17:20 STScI Edit Number: 1 Title Measuring the Mass of El Gordo to Near the Virial Radius ------------------------------------------------------------------------------------ Type Cycle GO 23 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. John P. Hughes Rutgers the State University of New Jersey Y CoI: Prof. Felipe Menanteau University of Illinois at Urbana - N Champaign CoI: Dr. Myungkook J. Jee University of California - Davis N CoI: Mr. Cristobal Sifon Universiteit Leiden N CoI: Prof. L Felipe Barrientos Pontificia Universidad Catolica de Chile N CoI: Dr. Leopoldo Infante Pontificia Universidad Catolica de Chile N ------------------------------------------------------------------------------------ Abstract We propose a wide-area weak gravitational lensing study of ACT J0102-4915 "El Gordo, " the hottest, most massive, X-ray luminous, and brightest Sunyaev-Zel'dovich effect cluster and the only bullet-like merging cluster known at redshifts beyond 0.6. Our proposed ACS/WFC/F606W observations will result in a definitive, unbiased, model-independent mass profile to near the virial radius and an internal structure map of this z=0.87 merging cluster to strengthen the constraints its existence places on the growth of structure and the nature of dark matter in the standard cosmological model. ------------------------------------------------------------------------------------ Observations Description ------------------------ The target is a rich cluster of galaxies at a redshift of 0.87. The observation goals are to obtain a weak lensing mass measurement out to the virial radius. Currently there exists a 4-point mosaic of the center of the cluster in the F606W filter from HST program 12477. Our program expands the areal coverage by adding 8 more pointings in an annulus around the central region. The goal is to have complete spatial coverage of the field without any significant gaps between and among the existing 4-point mosiac and the 8 new pointings. As requested in our proposal, the orientation angle of the new 8 WFC/ACS pointings should be within +/- 20 degrees of the existing observations from program 12477. The given "Fixed Targets" coordinates were optimised assuming that the orientation angle will be within this range. We use one orbit for each point in the mosaic, employing a 4-point box dither pattern intended to perform 1/2 subpixel sampling and cover the chip gaps of ACS/WFC. Each pointing (orbit) is scheduled as a separate visit. Visit 1 has an ORIENT value designed to match the existing 4-point mosaic within +/- 20 degrees (allowing also for a 180 degree rotation). The ORIENT values for the remaining 14153( 4) - 20-Jul-2016 20:17:20 - [ 2] 7 visits are set to be the same as Visit 1. ------------------------------------------------------------------------------------ 14153( 4) - 20-Jul-2016 20:17:20 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 ACTJ0102-491 CLUSTER OF GALAXIES, RA=01H02M58.2080S +/- 0.1", J2000 V = 20 5-F1 GRAVITATIONAL LENS, DEC=-49D10'35.00" +/- 0.1" HIGH REDSHIFT CLUSTER, RICH CLUSTER Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 ACTJ0102-491 CLUSTER OF GALAXIES, RA=01H03M16.6990S +/- 0.1", J2000 V = 20 5-F2 GRAVITATIONAL LENS, DEC=-49D12'43.97" +/- 0.1" HIGH REDSHIFT CLUSTER, RICH CLUSTER Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 ACTJ0102-491 CLUSTER OF GALAXIES, RA=01H03M22.2430S +/- 0.1", J2000 V = 20 5-F3 GRAVITATIONAL LENS, DEC=-49D16'14.02" +/- 0.1" HIGH REDSHIFT CLUSTER, RICH CLUSTER Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 4 ACTJ0102-491 CLUSTER OF GALAXIES, RA=01H03M13.2050S +/- 0.1", J2000 V = 20 5-F4 GRAVITATIONAL LENS, DEC=-49D19'14.93" +/- 0.1" HIGH REDSHIFT CLUSTER, RICH CLUSTER Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 5 ACTJ0102-491 CLUSTER OF GALAXIES, RA=01H02M52.8800S +/- 0.1", J2000 V = 20 5-F5 GRAVITATIONAL LENS, DEC=-49D20'3.49" +/- 0.1" HIGH REDSHIFT CLUSTER, RICH CLUSTER Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 6 ACTJ0102-491 CLUSTER OF GALAXIES, RA=01H02M34.0140S +/- 0.1", J2000 V = 20 5-F6 GRAVITATIONAL LENS, DEC=-49D18'13.01" +/- 0.1" HIGH REDSHIFT CLUSTER, RICH CLUSTER Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 7 ACTJ0102-491 CLUSTER OF GALAXIES, RA=01H02M26.5720S +/- 0.1", J2000 V = 20 5-F7 GRAVITATIONAL LENS, DEC=-49D14'41.30" +/- 0.1" HIGH REDSHIFT CLUSTER, RICH CLUSTER Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 8 ACTJ0102-491 CLUSTER OF GALAXIES, RA=01H02M37.9640S +/- 0.1", J2000 V = 20 5-F8 GRAVITATIONAL LENS, DEC=-49D11'44.27" +/- 0.1" HIGH REDSHIFT CLUSTER, RICH CLUSTER Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 14153( 4) - 20-Jul-2016 20:17:20 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 5.943 Line_Spacing 3.077 Coordinate_Frame POS-TARG Pattern_Orient 91.429 Angle_Between_Sides 166.993 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 14153( 4) - 20-Jul-2016 20:17:20 - [ 5] Visit: 01 Visit Requirements: ORIENT 8D TO 8 D; BETWEEN 26-SEP-2016 AND 09-OCT-2016 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 ACTJ0102-49 ACS/WFC ACCUM WFCENTER F606W 1 576 S GS ACQ SCENARIO BASE1B3; 15-F1 (2304 S) 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 | ------------------------------------------------------------------------------------------------------------------------------------ ACTJ0102-4915-F1 1 ACS/WFC ACCUM WFCENTER F606W 1 none none none 1 N/A ACTJ0102-4915-F1 1 ACS/WFC ACCUM WFCENTER F606W 2 none none none 1 N/A ACTJ0102-4915-F1 1 ACS/WFC ACCUM WFCENTER F606W 3 none none none 1 N/A ACTJ0102-4915-F1 1 ACS/WFC ACCUM WFCENTER F606W 4 none none none 1 N/A 14153( 4) - 20-Jul-2016 20:17:20 - [ 6] Visit: 02 Visit Requirements: SAME ORIENT AS 01 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 ACTJ0102-49 ACS/WFC ACCUM WFCENTER F606W 1 576 S GS ACQ SCENARIO BASE1B3; 15-F2 (2304 S) 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 | ------------------------------------------------------------------------------------------------------------------------------------ ACTJ0102-4915-F2 1 ACS/WFC ACCUM WFCENTER F606W 1 none none none 1 N/A ACTJ0102-4915-F2 1 ACS/WFC ACCUM WFCENTER F606W 2 none none none 1 N/A ACTJ0102-4915-F2 1 ACS/WFC ACCUM WFCENTER F606W 3 none none none 1 N/A ACTJ0102-4915-F2 1 ACS/WFC ACCUM WFCENTER F606W 4 none none none 1 N/A 14153( 4) - 20-Jul-2016 20:17:20 - [ 7] Visit: 03 Visit Requirements: SAME ORIENT AS 01 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 ACTJ0102-49 ACS/WFC ACCUM WFCENTER F606W 1 576 S GS ACQ SCENARIO BASE1B3; 15-F3 (2304 S) 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 | ------------------------------------------------------------------------------------------------------------------------------------ ACTJ0102-4915-F3 1 ACS/WFC ACCUM WFCENTER F606W 1 none none none 1 N/A ACTJ0102-4915-F3 1 ACS/WFC ACCUM WFCENTER F606W 2 none none none 1 N/A ACTJ0102-4915-F3 1 ACS/WFC ACCUM WFCENTER F606W 3 none none none 1 N/A ACTJ0102-4915-F3 1 ACS/WFC ACCUM WFCENTER F606W 4 none none none 1 N/A 14153( 4) - 20-Jul-2016 20:17:20 - [ 8] Visit: 04 Visit Requirements: SAME ORIENT AS 01 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 ACTJ0102-49 ACS/WFC ACCUM WFCENTER F606W 1 576 S GS ACQ SCENARIO BASE1B3; 15-F4 (2304 S) 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 | ------------------------------------------------------------------------------------------------------------------------------------ ACTJ0102-4915-F4 1 ACS/WFC ACCUM WFCENTER F606W 1 none none none 1 N/A ACTJ0102-4915-F4 1 ACS/WFC ACCUM WFCENTER F606W 2 none none none 1 N/A ACTJ0102-4915-F4 1 ACS/WFC ACCUM WFCENTER F606W 3 none none none 1 N/A ACTJ0102-4915-F4 1 ACS/WFC ACCUM WFCENTER F606W 4 none none none 1 N/A 14153( 4) - 20-Jul-2016 20:17:20 - [ 9] Visit: 05 Visit Requirements: SAME ORIENT AS 01 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 ACTJ0102-49 ACS/WFC ACCUM WFCENTER F606W 1 576 S GS ACQ SCENARIO BASE1B3; 15-F5 (2304 S) 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 | ------------------------------------------------------------------------------------------------------------------------------------ ACTJ0102-4915-F5 1 ACS/WFC ACCUM WFCENTER F606W 1 none none none 1 N/A ACTJ0102-4915-F5 1 ACS/WFC ACCUM WFCENTER F606W 2 none none none 1 N/A ACTJ0102-4915-F5 1 ACS/WFC ACCUM WFCENTER F606W 3 none none none 1 N/A ACTJ0102-4915-F5 1 ACS/WFC ACCUM WFCENTER F606W 4 none none none 1 N/A 14153( 4) - 20-Jul-2016 20:17:20 - [ 10] Visit: 06 Visit Requirements: SAME ORIENT AS 01 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 ACTJ0102-49 ACS/WFC ACCUM WFCENTER F606W 1 576 S GS ACQ SCENARIO BASE1B3; 15-F6 (2304 S) 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 | ------------------------------------------------------------------------------------------------------------------------------------ ACTJ0102-4915-F6 1 ACS/WFC ACCUM WFCENTER F606W 1 none none none 1 N/A ACTJ0102-4915-F6 1 ACS/WFC ACCUM WFCENTER F606W 2 none none none 1 N/A ACTJ0102-4915-F6 1 ACS/WFC ACCUM WFCENTER F606W 3 none none none 1 N/A ACTJ0102-4915-F6 1 ACS/WFC ACCUM WFCENTER F606W 4 none none none 1 N/A 14153( 4) - 20-Jul-2016 20:17:20 - [ 11] Visit: 07 Visit Requirements: SAME ORIENT AS 01 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 ACTJ0102-49 ACS/WFC ACCUM WFCENTER F606W 1 576 S GS ACQ SCENARIO BASE1B3; 15-F7 (2304 S) 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 | ------------------------------------------------------------------------------------------------------------------------------------ ACTJ0102-4915-F7 1 ACS/WFC ACCUM WFCENTER F606W 1 none none none 1 N/A ACTJ0102-4915-F7 1 ACS/WFC ACCUM WFCENTER F606W 2 none none none 1 N/A ACTJ0102-4915-F7 1 ACS/WFC ACCUM WFCENTER F606W 3 none none none 1 N/A ACTJ0102-4915-F7 1 ACS/WFC ACCUM WFCENTER F606W 4 none none none 1 N/A 14153( 4) - 20-Jul-2016 20:17:20 - [ 12] Visit: 08 Visit Requirements: SAME ORIENT AS 01 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 ACTJ0102-49 ACS/WFC ACCUM WFCENTER F606W 1 576 S GS ACQ SCENARIO BASE1B3; 15-F8 (2304 S) 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 | ------------------------------------------------------------------------------------------------------------------------------------ ACTJ0102-4915-F8 1 ACS/WFC ACCUM WFCENTER F606W 1 none none none 1 N/A ACTJ0102-4915-F8 1 ACS/WFC ACCUM WFCENTER F606W 2 none none none 1 N/A ACTJ0102-4915-F8 1 ACS/WFC ACCUM WFCENTER F606W 3 none none none 1 N/A ACTJ0102-4915-F8 1 ACS/WFC ACCUM WFCENTER F606W 4 none none none 1 N/A 14153( 4) - 20-Jul-2016 20:17:20 - [ 13] Summary Form for Proposal 14153 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFCENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 26-SEP-2016 AND 09-OCT-2016, GS ACQ SCENARIO BASE1B3, ORIENT 8D TO 8 D, PATTERN 1 1, SAME ORIENT AS 01 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names ACTJ0102-4915-F1, ACTJ0102-4915-F2, ACTJ0102-4915-F3, ACTJ0102-4915-F4, ACTJ0102-4915-F5, ACTJ0102-4915-F6, ACTJ0102-4915-F7, ACTJ0102-4915-F8 ------------------------------------------------------------------------------------------------------------------------------------