12686( 2) - 11-Aug-2011 20:50:03 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12686 Version: 2 Check-in Time: 11-Aug-2011 20:50:03 STScI Edit Number: 0 Title Sw J2058+05: A Possible Second Relativistic Tidal Disruption Flare ------------------------------------------------------------------------------------ Type Cycle GO/DD 18 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Stephen Bradley Cenko University of California - Berkeley CoI: Dr. Andrew J. Levan The University of Warwick N CoI: Dr. Joshua S. Bloom University of California - Berkeley N CoI: Prof. Nial R. Tanvir University of Leicester N ------------------------------------------------------------------------------------ Abstract The recent discovery of the transient source Sw J1644+57 (aka GRB110328A) has unveiled an entirely new class of high-energy outbursts. Like GRBs, the outburst was believed to mark the birth of a relativistic jet, generating luminous X-ray and radio emission. However, the central engine powering Sw J1644+57 was the super-massive black hole in the nucleus of an otherwise normal (i.e., non-active) galaxy. The observed emission may result from the tidal disruption of a star passing too close to the central black hole. Here we request observations of a newly identified high-energy transient, Sw J2058+05, that shares many of the same properties. HST observations will allow us to precisely locate the transient emission with respect to the host galaxy nucleus (cementing the association with a super-massive black hole). These observations will also allow us to better constrain fundamental properties of the host galaxy (morphology, stellar and black hole mass), which is of vital importance for the theoretical interpretation of these sources. ------------------------------------------------------------------------------------ Observations Description ------------------------ TBD Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 12686( 2) - 11-Aug-2011 20:50:03 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SWIFTJ2058 GALAXY, ACCRETION DISK, RA=20H58M19.8980S +/- 0.1", J2000 Z = V = 23.5 +/- 0.5 JET, NUCLEUS DEC=+05D13'32.25" +/- 0.1" 1.1853 Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 12686( 2) - 11-Aug-2011 20:50:03 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE-3PT Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.135 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides 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 ------------------------------------------------------------------------------------------------------------------------------------ 12686( 2) - 11-Aug-2011 20:50:03 - [ 4] Visit: 01 Visit Requirements: BETWEEN 29-AUG-2011:00:00:00 AND 15-SEP-2011:00:00:00 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 SWIFTJ2058 WFC3/IR MULTIAC IR F160W SAMP-SEQ=STEP50, NSAMP=11 1 DEF PATTERN 2 1 CUM ------------------------------------------------------------------------------------------------------------------------------------ 2 SWIFTJ2058 WFC3/UVI ACCUM UVIS F475W 1 370.0 S PATTERN 1 2 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 | ------------------------------------------------------------------------------------------------------------------------------------ SWIFTJ2058 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM SWIFTJ2058 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM SWIFTJ2058 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM SWIFTJ2058 1 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM SWIFTJ2058 2 WFC3/UVI ACCUM UVIS F475W 1 none none none 1 N/A S SWIFTJ2058 2 WFC3/UVI ACCUM UVIS F475W 2 none none none 1 N/A S SWIFTJ2058 2 WFC3/UVI ACCUM UVIS F475W 3 none none none 1 N/A S 12686( 2) - 11-Aug-2011 20:50:03 - [ 5] Visit: 02 Visit Requirements: AFTER 01 BY 90 D TO 180.0 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 SWIFTJ2058 WFC3/IR MULTIAC IR F160W NSAMP=11, SAMP-SEQ=STEP50 1 DEF PATTERN 2 1 CUM ------------------------------------------------------------------------------------------------------------------------------------ 2 SWIFTJ2058 WFC3/UVI ACCUM UVIS F475W 1 370.0 S PATTERN 1 2 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 | ------------------------------------------------------------------------------------------------------------------------------------ SWIFTJ2058 1 WFC3/IR MULTIAC IR F160W 1 none none none 1 N/A CUM SWIFTJ2058 1 WFC3/IR MULTIAC IR F160W 2 none none none 1 N/A CUM SWIFTJ2058 1 WFC3/IR MULTIAC IR F160W 3 none none none 1 N/A CUM SWIFTJ2058 1 WFC3/IR MULTIAC IR F160W 4 none none none 1 N/A CUM SWIFTJ2058 2 WFC3/UVI ACCUM UVIS F475W 1 none none none 1 N/A S SWIFTJ2058 2 WFC3/UVI ACCUM UVIS F475W 2 none none none 1 N/A S SWIFTJ2058 2 WFC3/UVI ACCUM UVIS F475W 3 none none none 1 N/A S 12686( 2) - 11-Aug-2011 20:50:03 - [ 6] Summary Form for Proposal 12686 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, UVIS ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=11, SAMP-SEQ=STEP50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 90 D TO 180.0 D, BETWEEN 29-AUG-2011:00:00:00 AND 15-SEP-2011:00:00:00, PATTERN 1 2, PATTERN 2 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W, F475W ------------------------------------------------------------------------------------------------------------------------------------ Target Names SWIFTJ2058 ------------------------------------------------------------------------------------------------------------------------------------