10101( 5) - 08/16/05 14:08 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 10101 Version: 5 Check-in Time: 16-Aug-2005 18:08:19 Title The Region of the Hydrogen-Burning Limit in Omega Centauri and 47 Tucanae ------------------------------------------------------------------------------------ Type Cycle Parallel Pointing Tolerance GO 13 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Ivan R. King University of Washington CoI: Dr. Jay Anderson Rice University N CoI: Dr. Adrienne Cool San Francisco State University N CoI: Prof. Giampaolo Piotto Universita di Padova N CoI: Dr. Luigi R. Bedin Universita di Padova N ------------------------------------------------------------------------------------ Abstract We propose a photometric study of the lower main sequences of Omega Cen and 47 Tuc, down to the region of the H-burning limit, which the deeper faintness limit of ACS will allow us to reach. For the faintest stars, proper-motion separation of cluster from field is essential; hence we include Cycle 13 observations. The resulting color--magnitude diagrams (CMDs) and luminosity functions (LFs) will allow study of stars in a mass regime and metallicity that have never been accessible before, and will serve as an important check on theories of the structure of low-mass stars. These are the 2nd-epoch observations. ------------------------------------------------------------------------------------ Observations Description ------------------------ For maximum throughput and a good color baseline, we will use F606W and F814W. As discussed in the preceding section, at the second epoch F814W is sufficient. Real Time Justification ----------------------- The Cycle 13 observations will have to be placed identically with those of Cycle 11. Same orientation will restrict the scheduling windows in Cycle 13, but not severely. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 10101( 5) - 08/16/05 14:08 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC104 STELLAR CLUSTER, RA=00H22M40.1000S +/- 0.01S, J2000 V = 19.5+/-0.5 GLOBULAR CLUSTER DEC=-72D03'51.80" +/- 0.01", PLATE-ID=01X5 Coordinate Source: GSC_SURVEY_PLATE 2 NGC5139 STELLAR CLUSTER, RA=13H25M35.5000S +/- 0.1S, J2000 V = 19.5+/-0.5 GLOBULAR CLUSTER DEC=-47D40'6.70" +/- 0.1", PLATE-ID=00AK Coordinate Source: GSC_SURVEY_PLATE 10101( 5) - 08/16/05 14:08 - [ 3] Visit: 01 Visit Priority: Visit Requirements: ORIENT 19.34D TO 19.34 D; BETWEEN 01-OCT-2004:00:00:00 AND 01-DEC- 2004:00:00:00 On Hold Comments: Additional Comments: Position and orientation chosen to coincide with first epoch. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC104 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO,GAIN=2 1 1401 S ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC104 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO,GAIN=2 1 1400 S POS TARG 0.0012, 0.2738 ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC104 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO,GAIN=2 1 1474 S POS TARG 0.2733, 0.0205 ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC104 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO,GAIN=2 1 1474 S POS TARG 0.2745, 0.2943 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC104 1 ACS/WFC ACCUM WFC F814W none none none none 1 N/A NGC104 2 ACS/WFC ACCUM WFC F814W none none none none 1 N/A NGC104 3 ACS/WFC ACCUM WFC F814W none none none none 2 N/A NGC104 4 ACS/WFC ACCUM WFC F814W none none none none 2 N/A 10101( 5) - 08/16/05 14:08 - [ 4] Visit: 02 Visit Priority: Visit Requirements: ORIENT 90.0D TO 90.0 D; AFTER 01-JUN-2005:00:00:00 On Hold Comments: Additional Comments: Pointing and orientation put diffraction spike of a bright star in the ACS gap. They are identical with those of first epoch. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC5139 ACS/WFC ACCUM WFC F606W CR-SPLIT=NO,GAIN=2 1 1285 S ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC5139 ACS/WFC ACCUM WFC F606W CR-SPLIT=NO,GAIN=2 1 1285 S POS TARG 0.0012, 0.2738 ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC5139 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO,GAIN=2 1 1331 S ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC5139 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO,GAIN=2 1 1331 S POS TARG 0.0012, 0.2738 ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC5139 ACS/WFC ACCUM WFC F606W CR-SPLIT=NO,GAIN=2 1 1331 S POS TARG 0.2733, 0.0205 ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC5139 ACS/WFC ACCUM WFC F606W CR-SPLIT=NO,GAIN=2 1 1331 S POS TARG 0.2745, 0.2943 ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC5139 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO,GAIN=2 1 1331 S POS TARG 0.2733, 0.0205 ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC5139 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO,GAIN=2 1 1331 S POS TARG 0.2745, 0.2943 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC5139 1 ACS/WFC ACCUM WFC F606W none none none none 1 N/A NGC5139 2 ACS/WFC ACCUM WFC F606W none none none none 1 N/A NGC5139 3 ACS/WFC ACCUM WFC F814W none none none none 2 N/A NGC5139 4 ACS/WFC ACCUM WFC F814W none none none none 2 N/A NGC5139 5 ACS/WFC ACCUM WFC F606W none none none none 3 N/A NGC5139 6 ACS/WFC ACCUM WFC F606W none none none none 3 N/A NGC5139 7 ACS/WFC ACCUM WFC F814W none none none none 4 N/A NGC5139 8 ACS/WFC ACCUM WFC F814W none none none none 4 N/A 10101( 5) - 08/16/05 14:08 - [ 5] Visit: 12 Visit Priority: Visit Requirements: ORIENT 90.0D TO 90.0 D; ORIENT 270.0D TO 270.0 D; AFTER 01-JUN- 2005:00:00:00 On Hold Comments: Additional Comments: Pointing and orientation put diffraction spike of a bright star in the ACS gap. They are identical with those of first epoch. Repeat failed visit 02. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC5139 ACS/WFC ACCUM WFC F606W CR-SPLIT=NO,GAIN=2 1 1285 S ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC5139 ACS/WFC ACCUM WFC F606W CR-SPLIT=NO,GAIN=2 1 1285 S POS TARG 0.0012, 0.2738 ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC5139 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO,GAIN=2 1 1331 S ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC5139 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO,GAIN=2 1 1331 S POS TARG 0.0012, 0.2738 ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC5139 ACS/WFC ACCUM WFC F606W CR-SPLIT=NO,GAIN=2 1 1331 S POS TARG 0.2733, 0.0205 ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC5139 ACS/WFC ACCUM WFC F606W CR-SPLIT=NO,GAIN=2 1 1331 S POS TARG 0.2745, 0.2943 ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC5139 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO,GAIN=2 1 1331 S POS TARG 0.2733, 0.0205 ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC5139 ACS/WFC ACCUM WFC F814W CR-SPLIT=NO,GAIN=2 1 1331 S POS TARG 0.2745, 0.2943 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC5139 1 ACS/WFC ACCUM WFC F606W none none none none 1 N/A NGC5139 2 ACS/WFC ACCUM WFC F606W none none none none 1 N/A NGC5139 3 ACS/WFC ACCUM WFC F814W none none none none 2 N/A NGC5139 4 ACS/WFC ACCUM WFC F814W none none none none 2 N/A NGC5139 5 ACS/WFC ACCUM WFC F606W none none none none 3 N/A NGC5139 6 ACS/WFC ACCUM WFC F606W none none none none 3 N/A NGC5139 7 ACS/WFC ACCUM WFC F814W none none none none 4 N/A NGC5139 8 ACS/WFC ACCUM WFC F814W none none none none 4 N/A 10101( 5) - 08/16/05 14:08 - [ 6] Summary Form for Proposal 10101 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO GAIN=2 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 19.34D TO 19.34 D; BETWEEN 01-OCT-2004 00 00 00 AND 01-DEC-2004 00 00 00 POS TARG 0.0012, 0.2738 POS TARG 0.2733, 0.0205 POS TARG 0.2745, 0.2943 ORIENT 90.0D TO 90.0 D; AFTER 01-JUN-2005 00 00 00 ORIENT 90.0D TO 90.0 D; ORIENT 270.0D TO 270.0 D; AFTER 01-JUN-2005 00 00 00 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F814W F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC104 NGC5139 ------------------------------------------------------------------------------------------------------------------------------------