10768( 3) - 10/14/05 12:12 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 10768 Version: 3 Check-in Time: 14-Oct-2005 16:12:01 Title Locating the Ultraluminous X-Ray Source in IC 342 ------------------------------------------------------------------------------------ Type Cycle Parallel Pointing Tolerance GO 14 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Philip Kaaret University of Iowa CoI: Dr. Hua Feng University of Iowa N ------------------------------------------------------------------------------------ Abstract Identification of unique optical counterparts of ultraluminous X-ray sources will help us understand the evolutionary state of the ULX binaries and may enable direct mass measurements. The search for counterparts has been hampered by the limitations of the absolute astrometry of Chandra. Using wider optical fields, made possible with the HST/ACS, we demonstrate that we should detect multiple X-ray sources with optical counterparts which will enable us to achieve 0.1-0.2 arcsecond relative astrometry between HST and Chandra. This should enable a unique counterpart identification for the ULX in IC 342. ------------------------------------------------------------------------------------ Observations Description ------------------------ Visit 1 - We will obtain a mosaic image of the field around IX 342 X-1 using the ACS/WFC and the F625W filter (SDSS r). We perform a 950 s integration at each of four positions using the ACS/WFC with the F625W (SDSS r) filter. This can be done in two orbits. Visit 2 - We will obtain HST images in B, V, I, and H-alpha. This will require three orbits. The first orbit will be used to obtain F555W and F814W exposures of 1080 seconds each. The other two will be used to obtain F435W and F658N exposures of 2400 seconds each. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 10768( 3) - 10/14/05 12:12 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 IC342X1 UNIDENTIFIED, X-RAY RA=03H45M55.7000S +/- 1", J2000 V = 21.0+/-1.0 EMITTER DEC=+68D04'54.90" +/- 1" Coordinate Source: Other_Source: X-ray source 10768( 3) - 10/14/05 12:12 - [ 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 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.28 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.265 Line_Spacing 0.187 Coordinate_Frame POS-TARG Pattern_Orient 20.67 Angle_Between_Sides 69.05 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 3.011 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.28 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 10768( 3) - 10/14/05 12:12 - [ 4] Visit: 01 Visit Priority: 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 IC342X1 ACS/WFC ACCUM WFC F625W CR-SPLIT=NO 1 460 S POS TARG -94, 69; PATTERN 3 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 IC342X1 ACS/WFC ACCUM WFC F625W CR-SPLIT=NO 1 460 S POS TARG 94, 86; PATTERN 3 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 IC342X1 ACS/WFC ACCUM WFC F625W CR-SPLIT=NO 1 460 S POS TARG 95,-98; PATTERN 3 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 IC342X1 ACS/WFC ACCUM WFC F625W CR-SPLIT=NO 1 460 S POS TARG -96,-112; PATTERN 3 4 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ IC342X1 1 ACS/WFC ACCUM WFC F625W 1 none none none 1 N/A IC342X1 1 ACS/WFC ACCUM WFC F625W 2 none none none 1 N/A IC342X1 2 ACS/WFC ACCUM WFC F625W 1 none none none 1 N/A IC342X1 2 ACS/WFC ACCUM WFC F625W 2 none none none 1 N/A IC342X1 3 ACS/WFC ACCUM WFC F625W 1 none none none 2 N/A IC342X1 3 ACS/WFC ACCUM WFC F625W 2 none none none 2 N/A IC342X1 4 ACS/WFC ACCUM WFC F625W 1 none none none 2 N/A IC342X1 4 ACS/WFC ACCUM WFC F625W 2 none none none 2 N/A 10768( 3) - 10/14/05 12:12 - [ 5] Visit: 02 Visit Priority: 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 IC342X1 ACS/WFC ACCUM WFC F555W CR-SPLIT=NO 1 360 S PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 IC342X1 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO 1 360 S PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 IC342X1 ACS/WFC ACCUM WFC F658N CR-SPLIT=NO 1 600 S PATTERN 2 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 IC342X1 ACS/WFC ACCUM WFC F435W CR-SPLIT=NO 1 600 S PATTERN 2 4 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ IC342X1 1 ACS/WFC ACCUM WFC F555W 1 none none none 1 N/A IC342X1 1 ACS/WFC ACCUM WFC F555W 2 none none none 1 N/A IC342X1 1 ACS/WFC ACCUM WFC F555W 3 none none none 1 N/A IC342X1 2 ACS/WFC ACCUM WFC F814W 1 none none none 1 N/A IC342X1 2 ACS/WFC ACCUM WFC F814W 2 none none none 1 N/A IC342X1 2 ACS/WFC ACCUM WFC F814W 3 none none none 1 N/A IC342X1 3 ACS/WFC ACCUM WFC F658N 1 none none none 2 N/A IC342X1 3 ACS/WFC ACCUM WFC F658N 2 none none none 2 N/A IC342X1 3 ACS/WFC ACCUM WFC F658N 3 none none none 2 N/A IC342X1 3 ACS/WFC ACCUM WFC F658N 4 none none none 2 N/A IC342X1 4 ACS/WFC ACCUM WFC F435W 1 none none none 3 N/A IC342X1 4 ACS/WFC ACCUM WFC F435W 2 none none none 3 N/A IC342X1 4 ACS/WFC ACCUM WFC F435W 3 none none none 3 N/A IC342X1 4 ACS/WFC ACCUM WFC F435W 4 none none none 3 N/A 10768( 3) - 10/14/05 12:12 - [ 6] Summary Form for Proposal 10768 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements POS TARG -94, 69; PATTERN 3 1 POS TARG 94, 86; PATTERN 3 2 POS TARG 95,-98; PATTERN 3 3 POS TARG -96,-112; PATTERN 3 4 PATTERN 1 1 PATTERN 1 2 PATTERN 2 3 PATTERN 2 4 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F625W F555W F814W F658N F435W ------------------------------------------------------------------------------------------------------------------------------------ Target Names IC342X1 ------------------------------------------------------------------------------------------------------------------------------------