10197( 2) - 05/13/04 06:55 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 10197 Version: 2 Check-in Date: 13-May-2004 10:52:08 1.Proposal Title: The Astrophysical Parameters of Very Metal-Poor Halo Binaries ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle 4. Parallel Pointing Tolerance GO 13 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Prof. Elliott P. Horch University of Massachusetts Dartmouth CoI: Dr. Otto G. Franz Lowell Observatory N CoI: Dr. James N. Heasley University of Hawaii N CoI: Dr. Lawrence H. Wasserman Lowell Observatory N ------------------------------------------------------------------------------------ 6. Abstract Little is currently known concerning the mass-luminosity relation (MLR) of Population II stars. In Cycle 10, we began an initial study with FGS1 to resolve a sample of known spectroscopic binaries preselected as high-velocity and/or low metallicity objects. This has resulted in significant new information about the astrophysical parameters of metal-poor stars, but was limited mainly to intermediate metallicities, not to true Population II stars. A new sample of metal-poor spectroscopic binaries identified by Latham and his collaborators (e.g. Latham et al 2002) contains three new very metal-poor objects resolvable with FGS. We propose to observe these binaries and obtain additional observations of two very important resolved targets from our initial sample. As with that program, we will couple the already-known spectroscopic orbits with astrometric information which only FGS can deliver at present. To ensure that the most will be gained from these data, we als o request observations of three metal-poor single stars to be used as calibration objects. In combination with results from our previous program, these observations can be expected to resolve the question of the location of the Population II main sequence and give valuable insight into the accuracy of isochrone fitting for determination of globular clusters ages. Due to the combination of target magnitudes and expected separations, no object in this sample can be resolved without the unique capabilities of FGS. ------------------------------------------------------------------------------------ 10197( 2) - 05/13/04 06:55 - [ 2] Observations Description ------------------------ A total of five metal-poor halo stars, consisting of two spectroscopic orbital binaries and three single-star calibrators, will be observed with FGS 1 in TRANS mode. One of the binary targets, HD157948, will receive two visits. The other, BD+38D4955, will be observed on three visits. Each calibrator will receive one visit. Each visit will consist of approximately 60 TRANS scans. The F583W filter will be used for all observations. Real Time Justification ----------------------- Special scheduling requirements will apply to all visits. In the case of the two binary targets, the observations must be scheduled to cover very specific phases of the binary orbits requiring observing windows as narrow as 5 days. Moreover, in order for the calibration observations to be most effective, one calibration must be scheduled as contemporaneously with each of the three observations of BD+38D4955 as permitted by scheduling constraints. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 10197( 2) - 05/13/04 06:55 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HD157948 STAR, HALO RA=17H24M42.43S +/- 0.1", J2000 V = 8.1+/-0.05 DEC=+38D02'10.52" +/- 0.1" Coordinate Source: Other_Source: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 -0.0054 -0.196 0.0 2 BD+38D4955 STAR, HALO RA=23H13M38.82S +/- 0.1", J2000 V = 9.55+/-0.05 DEC=+39D25'2.6" +/- 0.1" Coordinate Source: Other_Source: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 0.0151 -0.3135 0.0 3 HIP3430 CALIBRATION, HALO RA=00H43M44.35S +/- 0.1", J2000 V = 10.22+/-5.0 DEC=+72D10'43.1" +/- 0.1" Coordinate Source: Other_Source: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 0.0708 0.09249 0.0 4 HIP15797 CALIBRATION, HALO RA=03H23M33.49S +/- 0.1", J2000 V = 8.97+/-0.05 DEC=+43D57'26.23" +/- 0.1" Coordinate Source: Other_Source: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 0.0112 -0.3349 0.0 5 HIP57450 CALIBRATION, HALO RA=11H46M35.15S +/- 0.1", J2000 V = 9.92+/-0.05 DEC=+50D52'54.7" +/- 0.1" Coordinate Source: Other_Source: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 -0.092 -0.54386 0.0 10197( 2) - 05/13/04 06:55 - [ 4] Visit: 01 Visit Priority: Visit Requirements: PCS MODE FINE; BETWEEN 27-SEP-2004:00:00:00 AND 01-OCT-2004:00:00:00 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 HD157948 FGS TRANS 1 F583W SCANS=55 1 1650 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 01 1 none none none none 1 tbd 10197( 2) - 05/13/04 06:55 - [ 5] Visit: 02 Visit Priority: Visit Requirements: PCS MODE FINE; BETWEEN 11-JUN-2005:00:00:00 AND 16-JUN-2005:00:00:00 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 HD157948 FGS TRANS 1 F583W SCANS=55 1 1650 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 02 1 none none none none 1 tbd 10197( 2) - 05/13/04 06:55 - [ 6] Visit: 03 Visit Priority: Visit Requirements: PCS MODE FINE; BETWEEN 11-AUG-2004:00:00:00 AND 16-AUG-2004:00:00:00 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 BD+38D4955 FGS TRANS 1 F583W SCANS=55 1 1650 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 03 1 none none none none 1 tbd 10197( 2) - 05/13/04 06:55 - [ 7] Visit: 04 Visit Priority: Visit Requirements: PCS MODE FINE; BETWEEN 25-OCT-2004:00:00:00 AND 31-OCT-2004:00:00:00 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 BD+38D4955 FGS TRANS 1 F583W SCANS=55 1 1650 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 04 1 none none none none 1 tbd 10197( 2) - 05/13/04 06:55 - [ 8] Visit: 05 Visit Priority: Visit Requirements: PCS MODE FINE; BETWEEN 01-MAY-2005:00:00:00 AND 06-MAY-2005:00:00:00 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 BD+38D4955 FGS TRANS 1 F583W SCANS=55 1 1650 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 05 1 none none none none 1 tbd 10197( 2) - 05/13/04 06:55 - [ 9] Visit: 06 Visit Priority: Visit Requirements: PCS MODE FINE; BETWEEN 12-AUG-2004:00:00:00 AND 16-AUG-2004:00:00:00 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 HIP3430 FGS TRANS 1 F583W SCANS=62 1 1860 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 06 1 none none none none 1 tbd 10197( 2) - 05/13/04 06:55 - [ 10] Visit: 07 Visit Priority: Visit Requirements: PCS MODE FINE; BETWEEN 18-NOV-2004:00:00:00 AND 25-NOV-2004:00:00:00 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 HIP15797 FGS TRANS 1 F583W SCANS=56 1 1680 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 07 1 none none none none 1 tbd 10197( 2) - 05/13/04 06:55 - [ 11] Visit: 08 Visit Priority: Visit Requirements: PCS MODE FINE; BETWEEN 11-MAY-2005:00:00:00 AND 16-MAY-2005:00:00:00 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 HIP57450 FGS TRANS 1 F583W SCANS=56 1 1680 S POS TARG 0, 0 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 08 1 none none none none 1 tbd 10197( 2) - 05/13/04 06:55 - [ 12] Summary Form for Proposal 10197 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations FGS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes TRANS ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SCANS=55 SCANS=62 SCANS=56 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PCS MODE FINE; BETWEEN 27-SEP-2004 00 00 00 AND 01-OCT-2004 00 00 00 POS TARG 0, 0 PCS MODE FINE; BETWEEN 11-JUN-2005 00 00 00 AND 16-JUN-2005 00 00 00 PCS MODE FINE; BETWEEN 11-AUG-2004 00 00 00 AND 16-AUG-2004 00 00 00 PCS MODE FINE; BETWEEN 25-OCT-2004 00 00 00 AND 31-OCT-2004 00 00 00 PCS MODE FINE; BETWEEN 01-MAY-2005 00 00 00 AND 06-MAY-2005 00 00 00 PCS MODE FINE; BETWEEN 12-AUG-2004 00 00 00 AND 16-AUG-2004 00 00 00 PCS MODE FINE; BETWEEN 18-NOV-2004 00 00 00 AND 25-NOV-2004 00 00 00 PCS MODE FINE; BETWEEN 11-MAY-2005 00 00 00 AND 16-MAY-2005 00 00 00 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F583W ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD157948 BD+38D4955 HIP3430 HIP15797 HIP57450 ------------------------------------------------------------------------------------------------------------------------------------