15670( 12) - 08-Apr-2020 17:40:06 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15670 Version: 12 Check-in Time: 08-Apr-2020 17:40:06 STScI Edit Number: 9 Title Studying Six Galaxy Clusters to be Used as Gravitational Lense Telescopes ------------------------------------------------------------------------------------ Type Cycle GO 26 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Hans Boehringer University Observatory, Y Ludwig-Maximilians-University, Munich CoI: Gayoung Chon Max-Planck-Institut fur extraterrestrische N Physik CoI: Prof. Richard S. Ellis University College London N ------------------------------------------------------------------------------------ Abstract The most massive galaxy clusters are extremely valuable study objects for a wide range of astrophysical and cosmological studies. In our completed all-sky X-ray cluster survey we found 6 rare, massive galaxy clusters (M500 greater than 6.4 x 10e14 Msun) in the redshift range z = 0.25 to 0.5 (sweet spot for gravitational lensing studies), which have not been observed in X-ray pointed observations so far (one has a short XMM exposure). We propose these objects for XMM-Newton and the two most interesting systems for HST observations, with a main goal to characterise their properties for lensing studies and their use as gravitational lensing telescopes. In addition these observations complete an important sample of massive clusters to be used for a range of cosmological studies. ------------------------------------------------------------------------------------ Observations Description ------------------------ This observation request is based on an XMM-Newton proposal with jointly allocted HST Time. Massive galaxy clusters are important study objects for Astrophysics and Cosmology. Since they are also very rare objects, the discovery and study of them is very valuable. In our recently completed all-sky survey for X-ray luminous clusters of galaxies we found six massive clusters (estimated M > 6.4 10e14 Msun) among 119 such objects in the redshift range z = 0.25 to 0.5 which have not been known and studied before. Massive clusters in this redshift range are the best grvitational lense telescopes for the study of the distant Universe. Because of the importance of these objects, we have requested XMM-Newton observing time to study all six objects, to determine their properties, their masses and the mass distribution in the clusters. The latter will allow us to construct first gravitational lensing models of the clusters and evaluate their efficiency as gravitational lense telescopes. For the two most prominent systems we have also requested HST observations to use them as gravitational lense telescopes for the detection of magnified high redshift galaxies. To be able to determine photometric redhsifts for the galaxies in the sky field of the clusters, we requested optical observations with ACS F814W and near infrared observations with WFC3 F110W and 160W. With 15670( 12) - 08-Apr-2020 17:40:06 - [ 2] the obtained data we will be able to detect magnified background galxies up to redshift z = 6 and beyond. The field-of-view of the observations will cover a cluster region of 0.8 to 1.2 Mpc for ACS and 500 - 800 Mpc for WFC3. This will easily provide a complete coverage of the strong lensing regions of the clusters. ------------------------------------------------------------------------------------ 15670( 12) - 08-Apr-2020 17:40:06 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 RXCJ1310.9+2 CLUSTER OF GALAXIES, RA=13H10M56.3000S +/- 1.0", J2000 V = 18.7 157 GRAVITATIONAL LENS DEC=+21D57'57.00" +/- 1.0" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 RXCJ1717.1+2 CLUSTER OF GALAXIES, RA=17H17M6.7000S +/- 1.0", J2000 V = 19.0 931 GRAVITATIONAL LENS DEC=+29D31'21.50" +/- 1.0" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 15670( 12) - 08-Apr-2020 17:40:06 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 3.034 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.29 Angle_Between_Sides Center_Pattern YES ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BLOB Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 5.183 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 41.859 Angle_Between_Sides Center_Pattern YES ------------------------------------------------------------------------------------------------------------------------------------ 15670( 12) - 08-Apr-2020 17:40:06 - [ 5] Visit: 01 (RXCJ1310.9+2157) 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 RXCJ1310.9+ ACS/WFC ACCUM WFC F814W 1 750 S GS ACQ SCENARIO BASE1B3; 2157 (2250 S) PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 RXCJ1310.9+ WFC3/IR MULTIAC IR-FIX F110W NSAMP=10, SAMP-SEQ=STEP200 1 DEF GS ACQ SCENARIO BASE1B3; 2157 CUM (1198.462 PATTERN 2 2 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 RXCJ1310.9+ WFC3/IR MULTIAC IR-FIX F160W NSAMP=10, SAMP-SEQ=STEP200 1 DEF PATTERN 2 3 2157 CUM (1198.462 S) Comments: We invite the schedulers to rearrange the exposures within the visit as they wish to best fit the F110W's into the darker time of the orbit as anticipated from the specific geometry that the schedule implies. We discussed this specific point with Dr. Mc Cullough via email. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ RXCJ1310.9+2157 1 ACS/WFC ACCUM WFC F814W 1 none none none 1 N/A RXCJ1310.9+2157 1 ACS/WFC ACCUM WFC F814W 2 none none none 1 N/A RXCJ1310.9+2157 1 ACS/WFC ACCUM WFC F814W 3 none none none 1 N/A RXCJ1310.9+2157 2 WFC3/IR MULTIAC IR-FIX F110W 1 none none none 2 N/A CUM RXCJ1310.9+2157 2 WFC3/IR MULTIAC IR-FIX F110W 2 none none none 2 N/A CUM RXCJ1310.9+2157 3 WFC3/IR MULTIAC IR-FIX F160W 1 none none none 2 N/A CUM RXCJ1310.9+2157 3 WFC3/IR MULTIAC IR-FIX F160W 2 none none none 2 N/A CUM 15670( 12) - 08-Apr-2020 17:40:06 - [ 6] Visit: 02 (RXCJ1717.1+2931) 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 RXCJ1717.1+ ACS/WFC ACCUM WFC F814W 1 750 S PATTERN 1 1 2931 see below (2286 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 RXCJ1717.1+ WFC3/IR MULTIAC IR-FIX F110W NSAMP=10, SAMP-SEQ=STEP200 1 DEF PATTERN 2 2 2931 CUM (1198.462 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 RXCJ1717.1+ WFC3/IR MULTIAC IR-FIX F160W NSAMP=10, SAMP-SEQ=STEP200 1 DEF PATTERN 2 3 2931 CUM (1198.462 S) Comments: We invite the schedulers to rearrange the exposures within the visit as they wish to best fit the F110W's into the darker time of the orbit as anticipated from the specific geometry that the schedule implies. We discussed this specific point with Dr. Mc Cullough via email. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ RXCJ1717.1+2931 1 ACS/WFC ACCUM WFC F814W 1 none none none 1 762.0 S RXCJ1717.1+2931 1 ACS/WFC ACCUM WFC F814W 2 none none none 1 762.0 S RXCJ1717.1+2931 1 ACS/WFC ACCUM WFC F814W 3 none none none 1 762.0 S RXCJ1717.1+2931 2 WFC3/IR MULTIAC IR-FIX F110W 1 none none none 2 N/A CUM RXCJ1717.1+2931 2 WFC3/IR MULTIAC IR-FIX F110W 2 none none none 2 N/A CUM RXCJ1717.1+2931 3 WFC3/IR MULTIAC IR-FIX F160W 1 none none none 2 N/A CUM RXCJ1717.1+2931 3 WFC3/IR MULTIAC IR-FIX F160W 2 none none none 2 N/A CUM 15670( 12) - 08-Apr-2020 17:40:06 - [ 7] Visit: 51 (RXCJ1310.9+2157) Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: Partial repeat of visit 01 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 RXCJ1310.9+ ACS/WFC ACCUM WFC F814W 1 750 S GS ACQ SCENARIO BASE1B3; 2157 (2250 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 | ------------------------------------------------------------------------------------------------------------------------------------ RXCJ1310.9+2157 1 ACS/WFC ACCUM WFC F814W 1 none none none 1 N/A RXCJ1310.9+2157 1 ACS/WFC ACCUM WFC F814W 2 none none none 1 N/A RXCJ1310.9+2157 1 ACS/WFC ACCUM WFC F814W 3 none none none 1 N/A 15670( 12) - 08-Apr-2020 17:40:06 - [ 8] Summary Form for Proposal 15670 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR-FIX, WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=10, SAMP-SEQ=STEP200 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GS ACQ SCENARIO BASE1B3, PATTERN 1 1, PATTERN 2 2, PATTERN 2 3, SAME ORIENT AS 01 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F110W, F160W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names RXCJ1310.9+2157, RXCJ1717.1+2931 ------------------------------------------------------------------------------------------------------------------------------------