10001( 2) - 10/03/03 11:52 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 10001 Version: 2 Check-in Date: 03-Oct-2003 11:51:31 1.Proposal Title: Locating Ultraluminous X-Ray Sources ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 12 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Dr. Philip Kaaret Smithsonian Institution Astrophysical Observatory ------------------------------------------------------------------------------------ 5. Abstract We propose to observe ultraluminous X-ray sources which are located near objects bright both in the X-rays and the optical using Chandra and HST. The presence of these reference objects will allow us to tie the x-ray and optical references frames and achieve 0.1-0.2 arcsecond relative position accuracy in searching for optical counterparts to the ultraluminous x-ray sources. This will be a significant improvement over the accuracy previously obtained for most ULXs (limited by Chandra's absolute astrometry) and will should permit identification of individual counterparts. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will use the ACS/WFC to obtain images of each target in the filters F435W = Johnson B and F606W = Broad V. A full orbit will be used to obtain each image. A roll-angle constraint will be for the observation of NGC 1073 in order to include both the ULX and the quasars in the field of view. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 10001( 2) - 10/03/03 11:52 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC3998ULX UNIDENTIFIED, X-RAY RA=11H57M50.4S +/- 6.0", J2000 V = 10.7 EMITTER DEC=+55D28'31.0" +/- 6.0" Coordinate Source: Other_Source: ROSAT HRI X-ray image 2 NGC1073OFFSE UNIDENTIFIED, X-RAY RA=02H43M38.3S +/- 6.0", J2000 V = 11.0 T EMITTER DEC=+01D23'0.00" +/- 6.0" Coordinate Source: Other_Source: ROSAT HRI X-ray image Comments: Coordinates are offset from ULX to permit ULX and AGN to fit into field of view. 10001( 2) - 10/03/03 11:52 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 3.011 Coordinate_Frame POS-TARG Pattern_Orient 85.28 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 3.011 Coordinate_Frame POS-TARG Pattern_Orient 85.28 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 10001( 2) - 10/03/03 11:52 - [ 4] Visit: 01 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: NGC 3998 ULX Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC3998ULX ACS/WF ACCUM WFC F435W CR-SPLIT=2 1 690 S PATTERN 1 1 C ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC3998ULX ACS/WF ACCUM WFC F606W CR-SPLIT=2 1 710 S PATTERN 1 2 C ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 01 1 1 none none 1 1 tbd 01 1 1 none none 2 1 tbd 01 1 2 none none 1 1 tbd 01 1 2 none none 2 1 tbd 01 1 3 none none 1 1 tbd 01 1 3 none none 2 1 tbd 01 2 1 none none 1 2 tbd 01 2 1 none none 2 2 tbd 01 2 2 none none 1 2 tbd 01 2 2 none none 2 2 tbd 01 2 3 none none 1 2 tbd 01 2 3 none none 2 2 tbd 10001( 2) - 10/03/03 11:52 - [ 5] Visit: 02 Visit Priority: Visit Requirements: ORIENT 3.0D TO 28.0 D On Hold Comments: Additional Comments: NGC 1073 ULX Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC1073OFFS ACS/WF ACCUM WFC F435W CR-SPLIT=2 1 1080 S PATTERN 2 1 ET C ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC1073OFFS ACS/WF ACCUM WFC F606W CR-SPLIT=2 1 1120 S PATTERN 2 2 ET C ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 02 1 1 none none 1 1 tbd 02 1 1 none none 2 1 tbd 02 1 2 none none 1 1 tbd 02 1 2 none none 2 1 tbd 02 2 1 none none 1 2 tbd 02 2 1 none none 2 2 tbd 02 2 2 none none 1 2 tbd 02 2 2 none none 2 2 tbd 10001( 2) - 10/03/03 11:52 - [ 6] Summary Form for Proposal 10001 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=2 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1 PATTERN 1 2 ORIENT 3.0D TO 28.0 D PATTERN 2 1 PATTERN 2 2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F435W F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC3998ULX NGC1073OFFSET ------------------------------------------------------------------------------------------------------------------------------------