12183( 3) - 09-Aug-2010 14:26:26 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12183 Version: 3 Check-in Time: 09-Aug-2010 14:26:26 STScI Edit Number: 0 Title The magnetar SGR 0418+5729 in the optical and infra-red ------------------------------------------------------------------------------------ Type Cycle GO 18 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Martin Durant University of Florida CoI: Dr. Oleg Y. Kargaltsev University of Florida N CoI: Dr. George G. Pavlov The Pennsylvania State University N ------------------------------------------------------------------------------------ Abstract The newly-discovered SGR 0418+5729 offers a unique opportunity to study the optical and infra-red emission of a magnetar: it is closer and less extincted than any other. The optical/IR counterpart has not yet been identified, so we ask for a short observation to find it, and establish its usefullness for further detailed study. ------------------------------------------------------------------------------------ Observations Description ------------------------ This program is simple: The main goal of this program is deep imaging of SGR 0418+5729, whose coordinates were accurately measured from X-ray images obtained with Chandra. The observations involve exposures at standard dithered pointings. The brightest star in the field now has V~14, J~12, and is ~30" from the region of interest. Depending on the orientation, three possible V~10 stars may be in the field, but at ~1.5' distance. With the ACS/WFC1 aperture, there is no chance of their bleed columns to approach the target area. Since there are no filter of camera changes within an orbit, and the program is short and simple, there should be no further considerations. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 12183( 3) - 09-Aug-2010 14:26:26 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SGR0418+2729 STAR, NEUTRON STAR RA=04H18M33.8670S +/- 0.1", J2000 V = 25 DEC=+57D32'22.91" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 12183( 3) - 09-Aug-2010 14:26:26 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.265 Line_Spacing 0.187 Coordinate_Frame POS-TARG Pattern_Orient 20.67 Angle_Between_Sides 69.05 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BOX-MIN Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.572 Line_Spacing 0.365 Coordinate_Frame POS-TARG Pattern_Orient 18.528 Angle_Between_Sides 74.653 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 12183( 3) - 09-Aug-2010 14:26:26 - [ 4] Visit: 01 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SGR0418+272 ACS/WFC ACCUM WFC1 F606W 1 500 S PATTERN 1 1 9 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 SGR0418+272 WFC3/IR MULTIAC IR F110W NSAMP=15, SAMP-SEQ=SPARS50 1 DEF PATTERN 2 2 9 CUM ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SGR0418+2729 1 ACS/WFC ACCUM WFC1 F606W 1 none none none 1 621.0 S SGR0418+2729 1 ACS/WFC ACCUM WFC1 F606W 2 none none none 1 621.0 S SGR0418+2729 1 ACS/WFC ACCUM WFC1 F606W 3 none none none 1 621.0 S SGR0418+2729 1 ACS/WFC ACCUM WFC1 F606W 4 none none none 1 621.0 S SGR0418+2729 2 WFC3/IR MULTIAC IR F110W 1 none none none 2 N/A CUM SGR0418+2729 2 WFC3/IR MULTIAC IR F110W 2 none none none 2 N/A CUM SGR0418+2729 2 WFC3/IR MULTIAC IR F110W 3 none none none 2 N/A CUM SGR0418+2729 2 WFC3/IR MULTIAC IR F110W 4 none none none 2 N/A CUM 12183( 3) - 09-Aug-2010 14:26:26 - [ 5] Summary Form for Proposal 12183 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, WFC1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=15, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 2 2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F110W, F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names SGR0418+2729 ------------------------------------------------------------------------------------------------------------------------------------