10442( 4) - 10/08/04 11:08 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 10442 Version: 4 Check-in Date: 08-Oct-2004 15:07:17 1.Proposal Title: Searching for an IR counterpart of the Soft Gamma Repeater SGR 1806-20 ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle 4. Parallel Pointing Tolerance GO/DD 13 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Dr. Chryssa Kouveliotou NASA Marshall Space Flight Center CoI: Dr. Stefanie Wachter California Institute of Technology N CoI: Dr. Peter M. Woods Universities Space Research Association N CoI: Mr. Andrew J. Levan University of Leicester N ------------------------------------------------------------------------------------ 6. Abstract We propose to observe the field of the Soft Gamma Repeater, SGR 1806-20, with HST/NICMOS to identify its infrared counterpart by comparison to images of the field in quiescence and moderate activity. The source has recently emitted two very intense and rare flares in the X-rays leading to a significant increase in its persistent X-ray emission. Should the source follow the trend observed for a similar object, namely the AXP 1E2259+586, which exhibited IR and X-ray emission rising and falling in tandem, this extreme current SGR activity is probably the only source state, where we would be able to detect an IR counterpart for Soft Gamma Repeaters. ------------------------------------------------------------------------------------ Observations Description ------------------------ We require to observe SGR 1806-20 using NIC3 and the F160W filters to obtain deep observations searching for an optical counterpart. We will use a total of two orbits in 4 dither positions to achive this. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 10442( 4) - 10/08/04 11:08 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SGR1806-20 STAR, NEUTRON STAR RA=18H08M39.3200S +/- 0.1", J2000 V = 20.0+/-10.0 DEC=-20D24'39.50" +/- 0.1" Coordinate Source: Other_Source: Chandra 10442( 4) - 10/08/04 11:08 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type NIC-SPIRAL-DITH Pattern_Purpose DITHER Number_Of_Points 9 Point_Spacing 0.5 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 0.0 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type NIC-SPIRAL-DITH Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.5 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 0.0 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 10442( 4) - 10/08/04 11:08 - [ 4] Visit: 01 Visit Priority: Visit Requirements: PCS MODE FINE; SCHED 100% 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 SGR1806-20 NIC3 MULTIAC NIC3 F160W SAMP-SEQ=SPARS64,NSAMP=22 1 DEF POS TARG -1.426,-1.421 CUM ------------------------------------------------------------------------------------------------------------------------------------ 2 SGR1806-20 NIC3 MULTIAC NIC3 F160W NSAMP=22,SAMP-SEQ=SPARS64 1 DEF POS TARG 7.87093744, CUM -8.194713491 ------------------------------------------------------------------------------------------------------------------------------------ 3 SGR1806-20 NIC3 MULTIAC NIC3 F160W SAMP-SEQ=SPARS64,NSAMP=22 1 DEF POS TARG 1.528,-1.421 CUM ------------------------------------------------------------------------------------------------------------------------------------ 4 SGR1806-20 NIC3 MULTIAC NIC3 F160W SAMP-SEQ=SPARS64,NSAMP=22 1 DEF POS TARG 1.528, 1.523 CUM ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 01 1 none none none none 1 tbd 01 2 none none none none 1 tbd 01 3 none none none none 2 tbd 01 4 none none none none 2 tbd 10442( 4) - 10/08/04 11:08 - [ 5] Visit: 02 Visit Priority: Visit Requirements: PCS MODE FINE; SCHED 100% 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 SGR1806-20 NIC3 MULTIAC NIC3 F160W SAMP-SEQ=STEP64,NSAMP=14 1 DEF PATTERN 1 1 CUM ------------------------------------------------------------------------------------------------------------------------------------ 2 SGR1806-20 NIC3 MULTIAC NIC3 F160W SAMP-SEQ=STEP64,NSAMP=14 1 DEF PATTERN 2 2 CUM ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 02 1 1 none none none 1 tbd 02 1 2 none none none 1 tbd 02 1 3 none none none 1 tbd 02 1 4 none none none 1 tbd 02 1 5 none none none 1 tbd 02 1 6 none none none 1 tbd 02 1 7 none none none 2 tbd 02 1 8 none none none 2 tbd 02 1 9 none none none 2 tbd 02 2 1 none none none 2 tbd 02 2 2 none none none 2 tbd 02 2 3 none none none 2 tbd 10442( 4) - 10/08/04 11:08 - [ 6] Summary Form for Proposal 10442 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures NIC3 ------------------------------------------------------------------------------------------------------------------------------------ Configurations NIC3 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SAMP-SEQ=SPARS64 NSAMP=22 NSAMP=14 SAMP-SEQ=STEP64 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO/DD ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PCS MODE FINE; SCHED 100% POS TARG -1.426,-1.421 POS TARG 7.87093744,-8.194713491 POS TARG 1.528,-1.421 POS TARG 1.528, 1.523 PATTERN 1 1 PATTERN 2 2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W ------------------------------------------------------------------------------------------------------------------------------------ Target Names SGR1806-20 ------------------------------------------------------------------------------------------------------------------------------------