12748( 2) - 30-Sep-2011 13:25:04 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12748 Version: 2 Check-in Time: 30-Sep-2011 13:25:04 STScI Edit Number: 0 Title Joint Chandra and HST Monitoring of the Crab Nebula ------------------------------------------------------------------------------------ Type Cycle GO 19 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Martin C. Weisskopf NASA Marshall Space Flight Center CoI: Prof. Roger D. Blandford Stanford University N CoI: Dr. Rolf Buehler Stanford University N CoI: Dr. Patrizia A. Caraveo INAF, Instituto di Astrofisica Spaziale e N Fisica CoI: Dr. E. Costa CNR, Istituto di Astrofisica Spaziale N CoI: Dr. Andrea De Luca Instituto Universitario de Studi Superiori N Pavia CoI: Dr. Carlo Ferrigno Integral Science Data Center N CoI: Dr. Stefan Funk Stanford University N CoI: Prof. Dieter Horns Deutsches Elektronen Synchrotron N CoI: Dr. Andrei Lobanov Max-Planck-Institut fur Radioastronomie N CoI: Dr. Roberto Mignani Mullard Space Science Laboratory N CoI: Dr. Marco Tavani INAF, Instituto di Astrofisica Spaziale e N Fisica CoI: Dr. Allyn Tennant NASA Marshall Space Flight Center N CoI: Dr. Yasunobu Uchiyama Stanford University N ------------------------------------------------------------------------------------ Abstract In 2010 Sep the Crab surprised the astrophysical community with a powerful 4-day-long gamma-ray flare, detected by the Agile and Fermi satellites. Chandra and HST images taken post flare, were limited by the lack of a reference image taken before the flare. While the study of future flaring activity will be covered by a companion TOO proposal, here we propose a joint Chandra HST program. The scientific purpose of this proposal is to: 1) establish an X-ray and optical baseline of the system prior to any gamma-ray flare as an aid for establishing the location of the flare and, 2) to identify and quantify the spatial and spectral variations in X-rays and/or the optical over time. ------------------------------------------------------------------------------------ Observations Description ------------------------ The program is part of a multiwavelength (X-ray and optical) monitoring campaign of the Crab pulsar and inner Nebula. It consists in a series of 6 ACS imaging observations in the F550M filter, to be performed quasi-simultaneously (within 10 days maximum) with Chandra/ACIS imaging observations. We ask to observe the target in January, February, March, April, August, September 2012. For each epoch, we have selected a time window (spanning 10 days) in which the target is visible. The HST visits (as well as the Chandra ones) should be scheduled within such windows. The same instrumental setup will be adopted for each visit. To fully cover the FOV of our Chandra observations (150"x150"), we will use the ACS/WFC with the WFC aperture. A box dithering pattern will be 12748( 2) - 30-Sep-2011 13:25:04 - [ 2] implemented to fill the inter-chip gap as well as to reject cosmic ray hits. Setting an exposure of 500 s for each position of the dithering pattern results in 2000 s exposure time per visit, which is well suited to achieve our goals and allows for an optimal use of the orbital visibility window. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 12748( 2) - 30-Sep-2011 13:25:04 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 V-CM-TAU STAR, PULSAR RA=05H34M31.9500S +/- 0.1", J2000 V = 16.5 DEC=+22D00'52.10" +/- 0.1" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 12748( 2) - 30-Sep-2011 13:25:04 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 3.5 Line_Spacing 0.5 Coordinate_Frame POS-TARG Pattern_Orient 85.28 Angle_Between_Sides 85.28 Center_Pattern NO Pattern_Comments: Dithering is aimed at filling the inter-chip gap as well as at rejecting CR hits ------------------------------------------------------------------------------------------------------------------------------------ 12748( 2) - 30-Sep-2011 13:25:04 - [ 5] Visit: 01 Visit Requirements: SCHED 80%; BETWEEN 08-JAN-2012:00:00:00 AND 19-JAN-2012:00:00:00 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 V-CM-TAU ACS/WFC ACCUM WFC1 F550M 1 500 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 1 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 2 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 3 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 4 none none none 1 N/A 12748( 2) - 30-Sep-2011 13:25:04 - [ 6] Visit: 02 Visit Requirements: SCHED 80%; BETWEEN 10-FEB-2012:00:00:00 AND 21-FEB-2012:00:00:00 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 V-CM-TAU ACS/WFC ACCUM WFC1 F550M 1 500 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 1 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 2 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 3 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 4 none none none 1 N/A 12748( 2) - 30-Sep-2011 13:25:04 - [ 7] Visit: 03 Visit Requirements: SCHED 80%; BETWEEN 10-MAR-2012:00:00:00 AND 21-MAR-2012:00:00:00 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 V-CM-TAU ACS/WFC ACCUM WFC1 F550M 1 500 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 1 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 2 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 3 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 4 none none none 1 N/A 12748( 2) - 30-Sep-2011 13:25:04 - [ 8] Visit: 04 Visit Requirements: SCHED 80%; BETWEEN 12-APR-2012:00:00:00 AND 23-APR-2012:00:00:00 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 V-CM-TAU ACS/WFC ACCUM WFC1 F550M 1 500 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 1 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 2 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 3 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 4 none none none 1 N/A 12748( 2) - 30-Sep-2011 13:25:04 - [ 9] Visit: 05 Visit Requirements: SCHED 80%; BETWEEN 13-AUG-2012:00:00:00 AND 24-AUG-2012:00:00:00 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 V-CM-TAU ACS/WFC ACCUM WFC1 F550M 1 500 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 1 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 2 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 3 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 4 none none none 1 N/A 12748( 2) - 30-Sep-2011 13:25:04 - [ 10] Visit: 06 Visit Requirements: SCHED 80%; BETWEEN 10-SEP-2012:00:00:00 AND 21-SEP-2012:00:00:00 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 V-CM-TAU ACS/WFC ACCUM WFC1 F550M 1 500 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 | ------------------------------------------------------------------------------------------------------------------------------------ V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 1 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 2 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 3 none none none 1 N/A V-CM-TAU 1 ACS/WFC ACCUM WFC1 F550M 4 none none none 1 N/A 12748( 2) - 30-Sep-2011 13:25:04 - [ 11] Summary Form for Proposal 12748 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFC1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 08-JAN-2012:00:00:00 AND 19-JAN-2012:00:00:00, BETWEEN 10-FEB-2012:00:00:00 AND 21-FEB-2012:00:00:00, BETWEEN 10-MAR-2012:00:00:00 AND 21-MAR-2012:00:00:00, BETWEEN 10-SEP-2012:00:00:00 AND 21-SEP-2012:00:00:00, BETWEEN 12-APR-2012:00:00:00 AND 23-APR-2012:00:00:00, BETWEEN 13-AUG-2012:00:00:00 AND 24-AUG-2012:00:00:00, PATTERN 1 1, SCHED 80% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F550M ------------------------------------------------------------------------------------------------------------------------------------ Target Names V-CM-TAU ------------------------------------------------------------------------------------------------------------------------------------