12256( 5) - 03-Sep-2010 12:06:10 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12256 Version: 5 Check-in Time: 03-Sep-2010 12:06:10 STScI Edit Number: 0 Title The Ultraviolet and Optical Counterparts of the Intermediate Mass Black Hole Candidate ESO 243-49 HLX-1 ------------------------------------------------------------------------------------ Type Cycle GO 18 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Sean A. Farrell University of Leicester CoI: Dr. Christian Knigge University of Southampton N CoI: Dr. Thomas J. Maccarone University of Southampton N CoI: Dr. Andrew Gosling University of Oxford N CoI: Dr. Matthieu Servillat Harvard University N CoI: Dr. Klaas Wiersema University of Leicester N CoI: Dr. Natalie Webb CNRS - Centre d'Etude Spatiale des N Rayonnements CoI: Dr. Didier Barret CNRS - Centre d'Etude Spatiale des N Rayonnements CoI: Dr. Olivier Godet CNRS - Centre d'Etude Spatiale des N Rayonnements ------------------------------------------------------------------------------------ Abstract We request imaging observations of the record breaking hyper-luminous X-ray source and intermediate mass black hole candidate HLX-1 in the galaxy ESO 243-49, in order to investigate the nature of recent detections of UV emission and an optical counterpart. HLX-1 is currently the best candidate for an intermediate mass black hole, the possible building blocks of super-massive black holes found in the centres of galaxies. UV emission possibly associated with the X-ray source position was recently detected in lower resolution observations with the Swift and GALEX satellites. If this emission can be tied to HLX-1 and is point-like in nature, it will likely be dominated by emission from a hot accretion disc. By obtaining UV photometry we will be able to place constraints upon the temperature of the disc and therefore the mass of the black hole. The optical counterpart may be related to disc emission, though it is also possible that it is associated with a globular cluster or nucleated dwarf galaxy. By obtaining photometry of the counterpart in near-infrared to UV wavelengths we will be able to construct a broad-band SED, which will allow us to place firm constraints on the environment around this intriguing object. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will observe for 3 orbits in FUV, NUV, optical and NIR with the ACS/SBC, WFC3/UVIS and WFC3/IR Real Time Justification ----------------------- Calibration Justification 12256( 5) - 03-Sep-2010 12:06:10 - [ 2] ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 12256( 5) - 03-Sep-2010 12:06:10 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HLX-1 UNIDENTIFIED, ACCRETION RA=01H10M28.3000S +/- 0.3", J2000 Z = 0.02 V = 24.5 +/- 0.3 R = 23.8 +/- 0.25 DISK, OPTICAL EMITTER, DEC=-46D04'22.30" +/- 0.3" ULTRAVIOLET EMITTER, X-RAY EMITTER Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 12256( 5) - 03-Sep-2010 12:06:10 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.636 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 41.788 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 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: 4 Primary_Pattern Secondary_Pattern Pattern_Type ACS-SBC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.179 Line_Spacing 0.116 Coordinate_Frame POS-TARG Pattern_Orient 20.02 Angle_Between_Sides 63.65 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 12256( 5) - 03-Sep-2010 12:06:10 - [ 5] 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HLX-1 ACS/SBC ACCUM SBC F140LP 1 700 S PATTERN 4 1 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ HLX-1 1 ACS/SBC ACCUM SBC F140LP 1 none none none 1 620.0 S HLX-1 1 ACS/SBC ACCUM SBC F140LP 2 none none none 1 620.0 S HLX-1 1 ACS/SBC ACCUM SBC F140LP 3 none none none 1 620.0 S HLX-1 1 ACS/SBC ACCUM SBC F140LP 4 none none none 1 620.0 S 12256( 5) - 03-Sep-2010 12:06:10 - [ 6] Visit: 02 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HLX-1 WFC3/UVI ACCUM UVIS2 F300X 1 900 S PATTERN 3 1 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 HLX-1 WFC3/UVI ACCUM UVIS2 F390W 1 400 S PATTERN 3 2 S see below ------------------------------------------------------------------------------------------------------------------------------------ 3 HLX-1 WFC3/UVI ACCUM UVIS2 F555W 1 350 S PATTERN 3 3 S see below ------------------------------------------------------------------------------------------------------------------------------------ 4 HLX-1 WFC3/UVI ACCUM UVIS2 F775W 1 350 S PATTERN 3 4 S see below ------------------------------------------------------------------------------------------------------------------------------------ 5 HLX-1 WFC3/IR MULTIAC IR F160W NSAMP=9, SAMP-SEQ=SPARS50 1 DEF PATTERN 2 5 CUM Comments: A number of Science warnings are produced by the BOT for the WFC3/IR exposures, indicating minimal to extreme saturation is predicted. We don't feel this is a problem as all but two of the problem detections are associated with diffuse bright emission along the plane and bulge of the host galaxy. The other warnings are associated with bright stars well away from the target. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ HLX-1 1 WFC3/UVI ACCUM UVIS2 F300X 1 none none none 1 855.0 S S HLX-1 1 WFC3/UVI ACCUM UVIS2 F300X 2 none none none 1 855.0 S S HLX-1 2 WFC3/UVI ACCUM UVIS2 F390W 1 none none none 1 356.0 S S HLX-1 2 WFC3/UVI ACCUM UVIS2 F390W 2 none none none 1 356.0 S S HLX-1 3 WFC3/UVI ACCUM UVIS2 F555W 1 none none none 2 371.0 S S HLX-1 3 WFC3/UVI ACCUM UVIS2 F555W 2 none none none 2 371.0 S S 12256( 5) - 03-Sep-2010 12:06:10 - [ 7] 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 | ------------------------------------------------------------------------------------------------------------------------------------ HLX-1 4 WFC3/UVI ACCUM UVIS2 F775W 1 none none none 2 370.0 S S HLX-1 4 WFC3/UVI ACCUM UVIS2 F775W 2 none none none 2 370.0 S S HLX-1 5 WFC3/IR MULTIAC IR F160W 1 none none none 2 N/A CUM HLX-1 5 WFC3/IR MULTIAC IR F160W 2 none none none 2 N/A CUM 12256( 5) - 03-Sep-2010 12:06:10 - [ 8] Summary Form for Proposal 12256 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, SBC, UVIS2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/SBC, WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=9, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 2 5, PATTERN 3 1, PATTERN 3 2, PATTERN 3 3, PATTERN 3 4, PATTERN 4 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F140LP, F160W, F300X, F390W, F555W, F775W ------------------------------------------------------------------------------------------------------------------------------------ Target Names HLX-1 ------------------------------------------------------------------------------------------------------------------------------------