13371( 4) - 08-Oct-2013 17:51:49 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13371 Version: 4 Check-in Time: 08-Oct-2013 17:51:49 STScI Edit Number: 1 Title HST/WFC3 UVIS Imaging of Tidal Disruption Event PS1-10jh ------------------------------------------------------------------------------------ Type Cycle GO 21 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Suvi Gezari University of Maryland Y CoI: Dr. Armin Rest Space Telescope Science Institute N CoI: Dr. Ryan Chornock Harvard University N CoI: Dr. Andy Lawrence University of Edinburgh, Institute for N Astronomy ------------------------------------------------------------------------------------ Abstract We propose for HST/WFC3 UVIS imaging of tidal disruption event candidate PS1-10jh, a UV/optical transient which is currently the most convincing example of an accretion-powered flare from the tidal disruption of a star by an otherwise dormant supermassive black hole. The proposed observations will critically test the tidal disruption event scenario, provide essential information for modeling the parameters of the event, and constrain theoretical models for the evolution of the accreting debris disk, by 1) determining the flare-nucleus separation much more accurately than ground-based observations, 2) measuring the late-time NUV emission from the flare, and 3) obtaining more accurate independent constraints on the central black hole mass. ------------------------------------------------------------------------------------ Observations Description ------------------------ We are using 3 orbits of HST/WFC3 UVIS observations to image PS1-10jh and its host galaxy in the F225W and F625W filters. We will take a total of 3.6 ksec of exposure in each filter, using hte box-dither pattern (WFC3-UVIS-DITHER-BOX) for cosmic-ray removal and improved sampling of the point spread function. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 13371( 4) - 08-Oct-2013 17:51:49 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 PS1-10JH GALAXY, ACCRETION DISK, RA=16H09M28.2761S +/- 0.1", J2000 V = 21.43 +/- 0.05 BULGE, ELLIPTICAL, DEC=+53D40'23.99" +/- 0.1" NUCLEUS Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 13371( 4) - 08-Oct-2013 17:51:49 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.173 Line_Spacing 0.112 Coordinate_Frame POS-TARG Pattern_Orient 23.884 Angle_Between_Sides 81.785 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 13371( 4) - 08-Oct-2013 17:51:49 - [ 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PS1-10JH WFC3/UVI ACCUM UVIS F225W FLASH=10 1 900 S PATTERN 1 1 S see below (3791 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 PS1-10JH WFC3/UVI ACCUM UVIS F625W 1 900 S PATTERN 1 2 S see below (5014 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 | ------------------------------------------------------------------------------------------------------------------------------------ PS1-10JH 1 WFC3/UVI ACCUM UVIS F225W 1 none none none 1 941.0 S S PS1-10JH 1 WFC3/UVI ACCUM UVIS F225W 2 none none none 1 940.0 S S PS1-10JH 1 WFC3/UVI ACCUM UVIS F225W 3 none none none 1 940.0 S S PS1-10JH 1 WFC3/UVI ACCUM UVIS F225W 4 none none none 2 970.0 S S PS1-10JH 2 WFC3/UVI ACCUM UVIS F625W 1 none none none 2 971.0 S S PS1-10JH 2 WFC3/UVI ACCUM UVIS F625W 2 none none none 2 971.0 S S PS1-10JH 2 WFC3/UVI ACCUM UVIS F625W 3 none none none 3 1536.0 S S PS1-10JH 2 WFC3/UVI ACCUM UVIS F625W 4 none none none 3 1536.0 S S 13371( 4) - 08-Oct-2013 17:51:49 - [ 5] Summary Form for Proposal 13371 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=10 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F225W, F625W ------------------------------------------------------------------------------------------------------------------------------------ Target Names PS1-10JH ------------------------------------------------------------------------------------------------------------------------------------