12759( 7) - 17-Oct-2011 14:25:44 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12759 Version: 7 Check-in Time: 17-Oct-2011 14:25:44 STScI Edit Number: 4 Title A Chandra Legacy Project to Resolve the Accretion Flow of Gas Captured by a Supermassive Black Hole ------------------------------------------------------------------------------------ Type Cycle GO 19 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Jimmy A. Irwin University of Alabama CoI: Dr. Ka-Way Wong University of Alabama N CoI: Dr. William Mathews University of California - Santa Cruz N CoI: Prof. Eliot Quataert University of California - Berkeley N CoI: Dr. Jay Strader Smithsonian Institution Astrophysical N Observatory CoI: Dr. Aaron Romanowsky University of California - Santa Cruz N CoI: Prof. Jean P. Brodie University of California - Santa Cruz N CoI: Dr. Soeren S. Larsen Universiteit Utrecht, Sterrekundig N Instituut CoI: Dr. Mihoko Yukita University of Alabama N CoI: Dr. Evan Million University of Alabama N CoI: Dr. Yuanyuan Su University of Alabama N ------------------------------------------------------------------------------------ Abstract We propose a 1 Msec observation of the hot gas around the supermassive black hole at the center of the nearby S0 galaxy NGC3115 in order to place the first direct observational constraints on the temperature and density structure of an accretion flow inside the Bondi radius of a black hole. These temperature/density constraints will provide a critical test for competing inefficient accretion flow theories. The large angular Bondi radius of this black hole provides the *only* opportunity to perform such a test of inefficient accretion flow theory in the Chandra era and the foreseeable future. An additional benefit of this long observation is that it will also provide the deepest look of the X-ray binary population of a normal early-type galaxy to date. ------------------------------------------------------------------------------------ Observations Description ------------------------ The primary observations with ACS/WFC are designed for photometry in F475W and F850LP of globular clusters in the massive S0 galaxy NGC 3115. These observations complement extremely deep Chandra imaging and the goal is to cross-match X-ray sources with HST-identified clusters (a secondary goal is to match X-ray sources with background galaxies, to help isolate field sources with no counterparts). The use of two filters gives color information used to estimate rough metallicities of the clusters. Depending on the filter, we use two or three exposures and a simple line dither to cover the chip gap and correct pixel-level defects and cosmic rays. Given 54 min of visibility per orbit, about 33 min are available after overheads for science exposures. Exposure times of 820 sec in F475W and 1170 sec in F850LP give approximately equal signal-to-noise in the two bands. For one pointing covering the galaxy nucleus, we take a short exposure in F850LP because of the possibility of 12759( 7) - 17-Oct-2011 14:25:44 - [ 2] saturation in the center. NGC 3115 has no archival ACS data. The six pointings in this proposals are arranged in a mosaic, stretched to maximizing joint coverage of the galaxy and the Chandra ACIS FOV chip. The need to match the Chandra data leads to the restrictive orientation requirements. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 12759( 7) - 17-Oct-2011 14:25:44 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC3115-POS1 GALAXY, LENTICULAR RA=10H05M26.4340S +/- 0.1", J2000 V = 663 V = 10 DEC=-07D42'18.14" +/- 0.1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC3115-POS2 GALAXY, LENTICULAR RA=10H05M17.8150S +/- 0.1", J2000 V = 663 V = 10 DEC=-07D39'47.08" +/- 0.1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC3115-POS3 GALAXY, LENTICULAR RA=10H05M16.0510S +/- 0.1", J2000 V = 663 V = 10 DEC=-07D44'10.97" +/- 0.1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC3115-POS4 GALAXY, LENTICULAR RA=10H05M10.4850S +/- 0.1", J2000 V = 663 V = 10 DEC=-07D42'34.29" +/- 0.1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC3115-POS5 GALAXY, LENTICULAR RA=10H05M10.0110S +/- 0.1", J2000 V = 663 V = 10 DEC=-07D46'34.01" +/- 0.1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC3115-POS6 GALAXY, LENTICULAR RA=10H05M1.4570S +/- 0.1", J2000 V = 663 V = 10 DEC=-07D44'3.93" +/- 0.1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 12759( 7) - 17-Oct-2011 14:25:44 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 4 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 3.011 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.28 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 5 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 3.011 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.28 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 12759( 7) - 17-Oct-2011 14:25:44 - [ 5] Visit: 01 Visit Requirements: ORIENT 46.0D TO 54 D 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC3115-POS ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 410 S GS ACQ SCENARIO BASE1B3; 1 see below PATTERN 4 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC3115-POS ACS/WFC ACCUM WFCENTER F850LP CR-SPLIT=NO 1 390 S PATTERN 5 2 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC3115-POS1 1 ACS/WFC ACCUM WFCENTER F475W 1 none none none 1 412.0 S NGC3115-POS1 1 ACS/WFC ACCUM WFCENTER F475W 2 none none none 1 412.0 S NGC3115-POS1 2 ACS/WFC ACCUM WFCENTER F850LP 1 none none none 1 N/A NGC3115-POS1 2 ACS/WFC ACCUM WFCENTER F850LP 2 none none none 1 N/A NGC3115-POS1 2 ACS/WFC ACCUM WFCENTER F850LP 3 none none none 1 N/A 12759( 7) - 17-Oct-2011 14:25:44 - [ 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC3115-POS ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 410 S GS ACQ SCENARIO BASE1B3; 2 see below PATTERN 4 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC3115-POS ACS/WFC ACCUM WFCENTER F850LP CR-SPLIT=NO 1 390 S PATTERN 5 2 2 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC3115-POS2 1 ACS/WFC ACCUM WFCENTER F475W 1 none none none 1 412.0 S NGC3115-POS2 1 ACS/WFC ACCUM WFCENTER F475W 2 none none none 1 412.0 S NGC3115-POS2 2 ACS/WFC ACCUM WFCENTER F850LP 1 none none none 1 N/A NGC3115-POS2 2 ACS/WFC ACCUM WFCENTER F850LP 2 none none none 1 N/A NGC3115-POS2 2 ACS/WFC ACCUM WFCENTER F850LP 3 none none none 1 N/A 12759( 7) - 17-Oct-2011 14:25:44 - [ 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC3115-POS ACS/WFC ACCUM WFCENTER F850LP CR-SPLIT=NO 1 90 S GS ACQ SCENARIO BASE1B3 3 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC3115-POS ACS/WFC ACCUM WFCENTER F850LP CR-SPLIT=NO 1 349 S PATTERN 5 2 3 ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC3115-POS ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 361 S PATTERN 4 3 3 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC3115-POS3 1 ACS/WFC ACCUM WFCENTER F850LP none none none none 1 N/A NGC3115-POS3 2 ACS/WFC ACCUM WFCENTER F850LP 1 none none none 1 N/A NGC3115-POS3 2 ACS/WFC ACCUM WFCENTER F850LP 2 none none none 1 N/A NGC3115-POS3 2 ACS/WFC ACCUM WFCENTER F850LP 3 none none none 1 N/A NGC3115-POS3 3 ACS/WFC ACCUM WFCENTER F475W 1 none none none 1 N/A NGC3115-POS3 3 ACS/WFC ACCUM WFCENTER F475W 2 none none none 1 N/A 12759( 7) - 17-Oct-2011 14:25:44 - [ 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC3115-POS ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 410 S GS ACQ SCENARIO BASE1B3; 4 see below PATTERN 4 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC3115-POS ACS/WFC ACCUM WFCENTER F850LP CR-SPLIT=NO 1 390 S PATTERN 5 2 4 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC3115-POS4 1 ACS/WFC ACCUM WFCENTER F475W 1 none none none 1 412.0 S NGC3115-POS4 1 ACS/WFC ACCUM WFCENTER F475W 2 none none none 1 412.0 S NGC3115-POS4 2 ACS/WFC ACCUM WFCENTER F850LP 1 none none none 1 N/A NGC3115-POS4 2 ACS/WFC ACCUM WFCENTER F850LP 2 none none none 1 N/A NGC3115-POS4 2 ACS/WFC ACCUM WFCENTER F850LP 3 none none none 1 N/A 12759( 7) - 17-Oct-2011 14:25:44 - [ 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC3115-POS ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 410 S GS ACQ SCENARIO BASE1B3; 5 see below PATTERN 4 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC3115-POS ACS/WFC ACCUM WFCENTER F850LP CR-SPLIT=NO 1 390 S PATTERN 5 2 5 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC3115-POS5 1 ACS/WFC ACCUM WFCENTER F475W 1 none none none 1 412.0 S NGC3115-POS5 1 ACS/WFC ACCUM WFCENTER F475W 2 none none none 1 412.0 S NGC3115-POS5 2 ACS/WFC ACCUM WFCENTER F850LP 1 none none none 1 N/A NGC3115-POS5 2 ACS/WFC ACCUM WFCENTER F850LP 2 none none none 1 N/A NGC3115-POS5 2 ACS/WFC ACCUM WFCENTER F850LP 3 none none none 1 N/A 12759( 7) - 17-Oct-2011 14:25:44 - [ 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC3115-POS ACS/WFC ACCUM WFCENTER F475W CR-SPLIT=NO 1 410 S GS ACQ SCENARIO BASE1B3; 6 see below PATTERN 4 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC3115-POS ACS/WFC ACCUM WFCENTER F850LP CR-SPLIT=NO 1 390 S PATTERN 5 2 6 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC3115-POS6 1 ACS/WFC ACCUM WFCENTER F475W 1 none none none 1 412.0 S NGC3115-POS6 1 ACS/WFC ACCUM WFCENTER F475W 2 none none none 1 412.0 S NGC3115-POS6 2 ACS/WFC ACCUM WFCENTER F850LP 1 none none none 1 N/A NGC3115-POS6 2 ACS/WFC ACCUM WFCENTER F850LP 2 none none none 1 N/A NGC3115-POS6 2 ACS/WFC ACCUM WFCENTER F850LP 3 none none none 1 N/A 12759( 7) - 17-Oct-2011 14:25:44 - [ 11] Summary Form for Proposal 12759 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFCENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GS ACQ SCENARIO BASE1B3, ORIENT 46.0D TO 54 D, PATTERN 4 1, PATTERN 4 3, PATTERN 5 2, SAME ORIENT AS 01 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F475W, F850LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC3115-POS1, NGC3115-POS2, NGC3115-POS3, NGC3115-POS4, NGC3115-POS5, NGC3115-POS6 ------------------------------------------------------------------------------------------------------------------------------------