14814( 3) - 29-Jun-2016 20:56:43 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14814 Version: 3 Check-in Time: 29-Jun-2016 20:56:43 STScI Edit Number: 0 Title Searching the IR counterpart of the mysterious central object in RCW 103 ------------------------------------------------------------------------------------ Type Cycle GO/DD 23 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Shriharsh Tendulkar McGill University Y CoI: Dr. Victoria M. Kaspi McGill University N CoI: Mr. Paul Scholz McGill University Y CoI: Mr. Robert Archibald McGill University Y ------------------------------------------------------------------------------------ Abstract 2E 1613.5-5053, a likely neutron star, is a X-ray bright source at the center of a young 2-kyr supernova remnant RCW 103. Despite 30 years of study, its true nature is a mystery. It shows behavior reminiscent of magnetars yet has a periodicity of 6.67 hrs -- too slow to be a rotational period, but also very unlikely to be a binary orbital period. On 2016 June 22, it emitted a bright 8-ms, magnetar-like burst detected by Swift-BAT and is now 15 times brighter in 0.5-10 keV X-ray luminosity compared to quiesence. We request rapid deep F110W and F160W imaging of this target to find a fading counterpart, or put strong limits on its presence. We request the first observation to be conducted within a week, with the next scheduled after about a month. Either result will be distinctive for the proposed theoretical models -- a magnetar in a very low mass X-ray binary (LMXB), a magnetar with a fall-back disk or a `pre'-LMXB. ------------------------------------------------------------------------------------ Observations Description ------------------------ We'll observe 2E 1613.5-5053 with WFC3 in F110W and F160W, once within a week (Visit 1) and once after a month or two (Visit 2). In each visit, each filter, we'll use the standard 4 position dither pattern. The aim is to observe a possibly brightened and fading IR counterpart of a weird neutron star that had a magnetar-like outburst last week. There are 7 stars in the 0.7" radius Chandra error circle. ------------------------------------------------------------------------------------ 14814( 3) - 29-Jun-2016 20:56:43 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 2E-1613.5-50 UNIDENTIFIED, X-RAY RA=16H17M36.2300S +/- 0.3", J2000 V = 25 Target does not yet have a 53 EMITTER DEC=-51D02'24.60" +/- 0.2" confirmed optical/IR counterpart. Reference Frame: Other: SIMBAD Extended: NO Comments: This object was generated by the target selector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 14814( 3) - 29-Jun-2016 20:56:43 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 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 ------------------------------------------------------------------------------------------------------------------------------------ 14814( 3) - 29-Jun-2016 20:56:43 - [ 4] Visit: 01 Visit Requirements: BEFORE 06-JUL-2016:00:00:00 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 2E-1613.5-5 WFC3/IR MULTIAC IRSUB512 F160W NSAMP=9, SAMP-SEQ=STEP25 1 DEF 053 CUM (105.518 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 2E-1613.5-5 WFC3/IR MULTIAC IRSUB512 F110W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF PATTERN 1 2-3 053 CUM (1287.002 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 2E-1613.5-5 WFC3/IR MULTIAC IRSUB512 F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF 053 CUM (1287.002 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 | ------------------------------------------------------------------------------------------------------------------------------------ 2E-1613.5-5053 1 WFC3/IR MULTIAC IRSUB512 F160W none none none none 1 N/A CUM 2E-1613.5-5053 2 WFC3/IR MULTIAC IRSUB512 F110W 1 none none none 1 N/A CUM 2E-1613.5-5053 2 WFC3/IR MULTIAC IRSUB512 F110W 2 none none none 1 N/A CUM 2E-1613.5-5053 2 WFC3/IR MULTIAC IRSUB512 F110W 3 none none none 1 N/A CUM 2E-1613.5-5053 2 WFC3/IR MULTIAC IRSUB512 F110W 4 none none none 1 N/A CUM 2E-1613.5-5053 3 WFC3/IR MULTIAC IRSUB512 F160W 1 none none none 1 N/A CUM 2E-1613.5-5053 3 WFC3/IR MULTIAC IRSUB512 F160W 2 none none none 1 N/A CUM 2E-1613.5-5053 3 WFC3/IR MULTIAC IRSUB512 F160W 3 none none none 1 N/A CUM 2E-1613.5-5053 3 WFC3/IR MULTIAC IRSUB512 F160W 4 none none none 1 N/A CUM 14814( 3) - 29-Jun-2016 20:56:43 - [ 5] Visit: 02 Visit Requirements: SAME ORIENT AS 01; BETWEEN 06-AUG-2016:00:00:00 AND 06-OCT-2016:00:00:00 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 2E-1613.5-5 WFC3/IR MULTIAC IRSUB512 F160W NSAMP=9, SAMP-SEQ=STEP25 1 DEF 053 CUM (105.518 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 2E-1613.5-5 WFC3/IR MULTIAC IRSUB512 F110W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF PATTERN 1 2-3 053 CUM (1287.002 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 2E-1613.5-5 WFC3/IR MULTIAC IRSUB512 F160W NSAMP=15, SAMP-SEQ=SPARS25 1 DEF 053 CUM (1287.002 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 | ------------------------------------------------------------------------------------------------------------------------------------ 2E-1613.5-5053 1 WFC3/IR MULTIAC IRSUB512 F160W none none none none 1 N/A CUM 2E-1613.5-5053 2 WFC3/IR MULTIAC IRSUB512 F110W 1 none none none 1 N/A CUM 2E-1613.5-5053 2 WFC3/IR MULTIAC IRSUB512 F110W 2 none none none 1 N/A CUM 2E-1613.5-5053 2 WFC3/IR MULTIAC IRSUB512 F110W 3 none none none 1 N/A CUM 2E-1613.5-5053 2 WFC3/IR MULTIAC IRSUB512 F110W 4 none none none 1 N/A CUM 2E-1613.5-5053 3 WFC3/IR MULTIAC IRSUB512 F160W 1 none none none 1 N/A CUM 2E-1613.5-5053 3 WFC3/IR MULTIAC IRSUB512 F160W 2 none none none 1 N/A CUM 2E-1613.5-5053 3 WFC3/IR MULTIAC IRSUB512 F160W 3 none none none 1 N/A CUM 2E-1613.5-5053 3 WFC3/IR MULTIAC IRSUB512 F160W 4 none none none 1 N/A CUM 14814( 3) - 29-Jun-2016 20:56:43 - [ 6] Summary Form for Proposal 14814 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IRSUB512 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=15, NSAMP=9, SAMP-SEQ=SPARS25, SAMP-SEQ=STEP25 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BEFORE 06-JUL-2016:00:00:00, BETWEEN 06-AUG-2016:00:00:00 AND 06-OCT-2016:00:00:00, PATTERN 1 2-3, SAME ORIENT AS 01 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F110W, F160W ------------------------------------------------------------------------------------------------------------------------------------ Target Names 2E-1613.5-5053 ------------------------------------------------------------------------------------------------------------------------------------