16001( 2) - 20-Sep-2019 18:30:14 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16001 Version: 2 Check-in Time: 20-Sep-2019 18:30:14 STScI Edit Number: 0 Title STUDYING AGN FEEDING AND FEEDBACK IN THE MOST QUENCHED COOL CORE CLUSTER ------------------------------------------------------------------------------------ Type Cycle GO 27 ------------------------------------------------------------------------------------ Investigators Contact? PI: Myriam Gitti Universita di Bologna Y CoI: Prof. Michael A. McDonald Massachusetts Institute of Technology Y CoI: Fabrizio Brighenti Universita di Bologna N CoI: Dr. Gianfranco Brunetti CNR, Istituto di Radioastronomia N CoI: Dr. Megan Donahue Michigan State University N CoI: Dr. Luigina Feretti INAF, Istituto di Fisica Spaziale e Fisica N Cosmica-Bologna CoI: Dr. William R. Forman Smithsonian Institution Astrophysical N Observatory CoI: Massimo Gaspari Princeton University N CoI: Dr. Marcello Giroletti INAF Istituto di Radioastronomia N CoI: Dr. Alessandro Ignesti Universita di Bologna N CoI: Dr. Christine Jones Smithsonian Institution Astrophysical N Observatory CoI: Dr. Brian R. McNamara University of Waterloo N CoI: Dr. Paul E. J. Nulsen Smithsonian Institution Astrophysical N Observatory CoI: Dr. Scott Randall Smithsonian Institution Astrophysical N Observatory ------------------------------------------------------------------------------------ Abstract We propose the parallel study of two systems that are almost identical in ICM and feedback properties, but differ by a factor of ~100 in SFR. With a SFR of ~0.1% of the classical cooling rate, RBS 797 may be the most quenched cool core cluster, making it the best place to study the effectiveness of AGN feedback. The jets in RBS 797 appear to have recently reoriented by 90 degrees over multiple AGN outbursts. We argue that precessing jets can lead to more isotropic heating, leading to maximally suppressed cooling. The requested high quality Chandra and narrow-band HST data of RBS 797 will allow us to examine in detail how AGN feedback in RBS 797 is more successfully coupling to the ICM, and potentially provide critical clues to the ultimate solution of the cooling flow problem. ------------------------------------------------------------------------------------ Observations Description ------------------------ Our goal is to obtain deep, high-angular resolution maps of [O II]3726, 3729 for the central galaxy in RBS797, following in methodology from HST Proposals 15315 and 15661. This is possible using the ramp filters on ACS, which provide narrow-band filters over the range 3700-10700A. At the redshift of our target the filter width is ~120A. The width of this filter means that we will (easily) obtain both lines in the [O II] doublet, while avoiding any other strong lines. Given the inherent challenge in flux calibrating and flat fielding HST ramp 16001( 2) - 20-Sep-2019 18:30:14 - [ 2] filter data, achieving a reliable flux map would be challenging even with perfect knowledge of the intrinsic extinction. In addition, we require broadband observations in order to subtract continuum emission, which will contribute significantly to the narrow bandpass. These two filters have been chosen for each galaxy to bracket the 4000A break and avoid emission from Balmer lines and [O III] (5007A). These broadband filters are a factor of ~10x wider than the narrow-band filter, providing similar sensitivity to the continuum in a single orbit as we achieve over 8 exposures in the narrow band. Combining the two bands bracketing the [OII] line, we will have a factor of 5x deeper exposure in the continuum, compared to the narrow-band exposure. Without these deep continuum images, we would add significant amounts of noise during the continuum-subtraction procedure, reducing the effective depth of our narrow-band images. ------------------------------------------------------------------------------------ 16001( 2) - 20-Sep-2019 18:30:14 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 CLG-J0947+76 CLUSTER OF GALAXIES, RA=09H47M12.9000S, J2000 V = 19.2 23 COOLING FLOW, EMISSION DEC=+76D23'13.71" LINE NEBULA, RICH CLUSTER Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2015.5 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 16001( 2) - 20-Sep-2019 18:30:14 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.262 Line_Spacing 0.192 Coordinate_Frame POS-TARG Pattern_Orient 18.39 Angle_Between_Sides 68.14 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 16001( 2) - 20-Sep-2019 18:30:14 - [ 5] Visit: 01 (RBS797-OII) 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 CLG-J0947+7 ACS/WFC ACCUM WFC1-MRAM FR505N 5046.36 1 2000 S 623 P see below (2966 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 CLG-J0947+7 ACS/WFC ACCUM WFC1-MRAM FR505N 5046.36 1 2000 S POS TARG 0.247, 0.094 623 P see below (3079 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 CLG-J0947+7 ACS/WFC ACCUM WFC1-MRAM FR505N 5046.36 1 2000 S POS TARG 0.124, 0.232 623 P see below (3079 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 | ------------------------------------------------------------------------------------------------------------------------------------ CLG-J0947+7623 1 ACS/WFC ACCUM WFC1-MRA FR505N 5046. none none none none 1 2966.0 S MP 36 CLG-J0947+7623 2 ACS/WFC ACCUM WFC1-MRA FR505N 5046. none none none none 2 3079.0 S MP 36 CLG-J0947+7623 3 ACS/WFC ACCUM WFC1-MRA FR505N 5046. none none none none 3 3079.0 S MP 36 16001( 2) - 20-Sep-2019 18:30:14 - [ 6] Visit: 02 (RBS797-OII) 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 CLG-J0947+7 ACS/WFC ACCUM WFC1-MRAM FR505N 5046.36 1 2000 S POS TARG -0.124, 0.138 623 P see below (2966 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 CLG-J0947+7 ACS/WFC ACCUM WFC1-MRAM FR505N 5046.36 1 2000 S POS TARG -0.124, 0.232 623 P see below (3079 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 | ------------------------------------------------------------------------------------------------------------------------------------ CLG-J0947+7623 1 ACS/WFC ACCUM WFC1-MRA FR505N 5046. none none none none 1 2966.0 S MP 36 CLG-J0947+7623 2 ACS/WFC ACCUM WFC1-MRA FR505N 5046. none none none none 2 3079.0 S MP 36 16001( 2) - 20-Sep-2019 18:30:14 - [ 7] Visit: 03 (RBS797-blue) 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 CLG-J0947+7 ACS/WFC ACCUM WFC2 F435W 1 1000 S PATTERN 2 1 623 see below (5728 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 | ------------------------------------------------------------------------------------------------------------------------------------ CLG-J0947+7623 1 ACS/WFC ACCUM WFC2 F435W 1 none none none 1 1404.0 S CLG-J0947+7623 1 ACS/WFC ACCUM WFC2 F435W 2 none none none 1 1404.0 S CLG-J0947+7623 1 ACS/WFC ACCUM WFC2 F435W 3 none none none 2 1460.0 S CLG-J0947+7623 1 ACS/WFC ACCUM WFC2 F435W 4 none none none 2 1460.0 S 16001( 2) - 20-Sep-2019 18:30:14 - [ 8] Summary Form for Proposal 16001 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFC1-MRAMP, WFC2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 2 1, POS TARG -0.124, 0.138, POS TARG -0.124, 0.232, POS TARG 0.124, 0.232, POS TARG 0.247, 0.094 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F435W, FR505N ------------------------------------------------------------------------------------------------------------------------------------ Target Names CLG-J0947+7623 ------------------------------------------------------------------------------------------------------------------------------------