14905( 7) - 23-Jan-2017 18:16:20 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14905 Version: 7 Check-in Time: 23-Jan-2017 18:16:20 STScI Edit Number: 5 Title Understanding the Super-Eddington phase in a Decade-long Tidal Disruption Event ------------------------------------------------------------------------------------ Type Cycle GO 24 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Dacheng Lin University of New Hampshire Y CoI: Dr. Natalie A. Webb Observatoire Midi-Pyrenees N CoI: Dr. Olivier Godet Observatoire Midi-Pyrenees N CoI: Dr. Didier Barret IRAP, Observatoire de Midi-Pyrenees N CoI: Dr. Stefanie Komossa Max-Planck-Institut fur Radioastronomie N CoI: Prof. Jimmy A. Irwin University of Alabama N CoI: Dr. Walter Peter Maksym III Smithsonian Institution Astrophysical N Observatory CoI: Dr. Dirk Grupe Morehead State University N CoI: Dr. James Francis Guillochon Harvard University N CoI: Dr. Enrico Ramirez-Ruiz University of California - Santa Cruz N ------------------------------------------------------------------------------------ Abstract We have discovered a decade-long X-ray tidal disruption candidate, which recent observations suggest to be still in the super-Eddington accretion phase but with sporadic dramatic spectral softening. We request three XMM-Newton monitorings in AO16 on this target, which is unique for study of the super-Eddington accretion onto supermassive black holes. The goals are to confirm its still being in the super-Eddington accretion phase and to measure the spectral softening occurrence rate, allowing us to determine whether the spectral softening is due to transient high-speed warm absorbers or state transition. We also request an HST orbit to help confirm the nuclear origin of the event and study its environment. ------------------------------------------------------------------------------------ Observations Description ------------------------ The program will have one orbit observation of a decade-long tidal disruption event using two filters, F606W and F814W. F606W use a dither-box patterm, with 375 second per exposure (1500 s in total). F814W use a dither-line pattern with 351 second per exposure (702 s in total). ------------------------------------------------------------------------------------ 14905( 7) - 23-Jan-2017 18:16:20 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 J150052+0154 GALAXY, STARBURST RA=15H00M52.0700S +/- 0.1", J2000 V = 20.0 52 DEC=+01D54'53.84" +/- 0.1" Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 14905( 7) - 23-Jan-2017 18:16:20 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.145 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 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 ------------------------------------------------------------------------------------------------------------------------------------ 14905( 7) - 23-Jan-2017 18:16:20 - [ 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 J150052+015 WFC3/UVI ACCUM UVIS F606W 1 375 S PATTERN 3 1 452 S (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 J150052+015 WFC3/UVI ACCUM UVIS F814W FLASH=4 1 351 S (702 PATTERN 2 2 452 S 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 | ------------------------------------------------------------------------------------------------------------------------------------ J150052+015452 1 WFC3/UVI ACCUM UVIS F606W 1 none none none 1 N/A S J150052+015452 1 WFC3/UVI ACCUM UVIS F606W 2 none none none 1 N/A S J150052+015452 1 WFC3/UVI ACCUM UVIS F606W 3 none none none 1 N/A S J150052+015452 1 WFC3/UVI ACCUM UVIS F606W 4 none none none 1 N/A S J150052+015452 2 WFC3/UVI ACCUM UVIS F814W 1 none none none 1 N/A S J150052+015452 2 WFC3/UVI ACCUM UVIS F814W 2 none none none 1 N/A S 14905( 7) - 23-Jan-2017 18:16:20 - [ 5] Summary Form for Proposal 14905 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=4 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 2 2, PATTERN 3 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F606W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names J150052+015452 ------------------------------------------------------------------------------------------------------------------------------------