10108( 4) - 06/14/04 17:05 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 10108 Version: 4 Check-in Date: 14-Jun-2004 21:04:13 1.Proposal Title: Dynamical Masses and Radii of Four White Dwarf Stars ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle 4. Parallel Pointing Tolerance GO 13 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Dr. Edmund Nelan Space Telescope Science Institute CoI: Mr. Russell Makidon Space Telescope Science Institute N ------------------------------------------------------------------------------------ 6. Abstract The cool white dwarf stars WD1639+153 and WD1818+126 were recently resolved by HST FGS1r to be double degenerate binary systems with projected separations of 112 mas and 174 mas respectively. At a distance of less than 50 pc they may both have periods shorter than about 20 years, making them ideal candidates for follow up studies for dynamical mass determinations. This will increase the number of white dwarfs with dynamical mass measurements from the current 4 up to 8. Continued observations of these white dwarfs along with nearby field stars with the FGS will accuractely determine the orbital elements and parallax of each system. The mass and radius of all four white dwarfs can be determined to an unprecedented 1%, making it possible to test and calibrate the theoretical white dwarf mass radius relation at the cool end of the cooling curve for the DA and DC subclasses. Since the components of the binary are coeval, once the mass and radius, and hence the cooling age of each star is known, it will be possible to estimate the relation between the initial mass and final mass for all four white dwarfs. We are requesting a total of 4 HST orbits per year for the next three cycles to initiate the process that will result in a determination of the mass and radius of the four white dwarfs. ------------------------------------------------------------------------------------ 10108( 4) - 06/14/04 17:05 - [ 2] Observations Description ------------------------ We will use FGS1r in its high angular resolution observing mode (TRANS) to resolve the white dwarf binary systems. Each exposure will be comprised of about 20 scans. The interferograms derived from each scan will be cross- correlated and co-added to yield a high SNR. To further surpress the noise (these targets are near the FGS's faint limiting magnitude), the co-added inteferograms will be carefully smoothed by being represented as a piece-wise smooth segmanted polynomial. These observations will yield the separation and position angle of the binary components, as well as the brightness of each. In addition, the binary and field stars simultaneously in the FGS FOV will be observed in POS mode to accurately determine the relative positions of the stars. This will facilitate the construction of an inertial reference frame for the binary, thereby allowing the relative orbit that will be ultimately determined from the TRANS data to be converted into a physical orbit. This will allow us to determine the relative mass of each white dwarf in the binarty system. In addition, the POS mode data will give the proper motion and parallax of the binary, which will allow us to compute the mass and radius of each white dwarf. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- The observations should be scheduled to occur at times of maximum parallax factor to allow us to determine the distance to each of these two white dwarf binary systems. ------------------------------------------------------------------------------------ 10108( 4) - 06/14/04 17:05 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 WD1639+153 EXT-STAR, DC RA=16H41M36.7S +/- 0.1", J2000 V = 15.7+/-0.1 DEC=+15D12'36.38" +/- 0.1" Coordinate Source: Other_Source: HST Cycle 10 Observations Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 0.0050 -0.736 0.0 2 WD1639-REF1 CALIBRATION, RA=16H41M39.6S +/- 0.1", J2000 V = 10.73+/-0.1 ASTROMETRIC DEC=+15D12'1.87" +/- 0.1", PLATE-ID=02D2 Coordinate Source: GUIDE_STAR_CATALOG 3 WD1639-REF2 CALIBRATION, RA=16H41M54.1S +/- 0.1", J2000 V = 12.1+/-0.1 ASTROMETRIC DEC=+15D11'19.2" +/- 0.1", PLATE-ID=02D2 Coordinate Source: GUIDE_STAR_CATALOG 4 WD1639-REF3 CALIBRATION, RA=16H41M49.13S +/- 0.1", J2000 V = 14.69+/-0.0 ASTROMETRIC DEC=+15D11'1.97" +/- 0.1", PLATE-ID=01GC Coordinate Source: GUIDE_STAR_CATALOG 5 WD1639-REF4 CALIBRATION, RA=16H41M22.82S +/- 0.1", J2000 V = 13.25+/-0.1 ASTROMETRIC DEC=+15D11'55.82" +/- 0.1", PLATE-ID=01GC Coordinate Source: GUIDE_STAR_CATALOG 6 WD1639-REF6 CALIBRATION, RA=16H41M22.45S +/- 0.1", J2000 V = 13.9+/-0.1 ASTROMETRIC DEC=+15D14'11.8" +/- 0.1", PLATE-ID=01GC Coordinate Source: GUIDE_STAR_CATALOG 7 WD1639-REF7 CALIBRATION, RA=16H41M25.94S +/- 0.1", J2000 V = 13.26+/-0.1 ASTROMETRIC DEC=+15D15'44.39" +/- 0.1", PLATE-ID=01GC Coordinate Source: GUIDE_STAR_CATALOG 8 WD1818+126 EXT-STAR, DC RA=18H20M30.88S +/- 0.1", J2000 V = 16.06+/-0.1 DEC=+12D39'17.7" +/- 0.1" Coordinate Source: Other_Source: HST Cycle 10 Proposal Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 0.0070 0.271 0.0 9 WD1818-GSC1- CALIBRATION, RA=18H20M23.67S +/- 0.1", J2000 V = 10.92+/-0.2 REF1 ASTROMETRIC DEC=+12D39'43.8" +/- 0.1", PLATE-ID=00JB Coordinate Source: GUIDE_STAR_CATALOG 10 WD1818-GSC1- CALIBRATION, RA=18H20M26.36S +/- 0.1", J2000 V = 12.7+/-0.2 REF2 ASTROMETRIC DEC=+12D39'25.2" +/- 0.1", PLATE-ID=00JB Coordinate Source: GUIDE_STAR_CATALOG 11 WD1818-GSC1- CALIBRATION, RA=18H20M31.97S +/- 0.1", J2000 V = 12.97+/-0.2 REF3 ASTROMETRIC DEC=+12D38'48.12" +/- 0.1", PLATE-ID=00JB Coordinate Source: GUIDE_STAR_CATALOG 10108( 4) - 06/14/04 17:05 - [ 4] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 12 WD1818-GSC2- CALIBRATION, RA=18H20M33.86S +/- 0.1", J2000 V = 14.23+/-0.2 REF1 ASTROMETRIC DEC=+12D39'5.56" +/- 0.1" Coordinate Source: Other_Source: GSC2 Comments: position and magnitude from GSC2, using Kriss & Stys color transformations. 13 WD1818-GSC2- CALIBRATION, RA=18H20M35.34S +/- 0.1", J2000 V = 14.49+/-0.2 REF2 ASTROMETRIC DEC=+12D38'50.74" +/- 0.1" Coordinate Source: Other_Source: GSC2 Comments: position and magnitude from GSC2, using Kriss & Stys color transformations 14 WD1818-GSC2- CALIBRATION, RA=18H20M33.61S +/- 0.1", J2000 V = 14.43+/-0.3 REF3 ASTROMETRIC DEC=+12D40'16.29" +/- 0.1" Coordinate Source: Other_Source: GSC2 Comments: position and magnitude from GSC2, using Kriss & Stys color transformation 15 WD1818-GSC2- CALIBRATION, RA=18H20M29.48S +/- 0.1", J2000 V = 15.01+/-0.2 REF4 ASTROMETRIC DEC=+12D40'21.03" +/- 0.1" Coordinate Source: Other_Source: GSC2 Comments: position and magnitude from GSC2, color transformation using Kriss & Stys 10108( 4) - 06/14/04 17:05 - [ 5] Visit: 01 Visit Priority: Visit Requirements: PCS MODE FINE; SCHED 30%; ORIENT 120.0D TO 120.0 D; BETWEEN 19-AUG- 2004:00:00:00 AND 02-SEP-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 WD1639+153 FGS TRANS 1 F583W STEP-SIZE=0.5,SCANS=25 1 800 S POS TARG 0,-17; SEQ 1-12 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 WD1639+153 FGS POS 1 F583W 1 25 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 WD1639-REF1 FGS POS 1 F583W 1 5 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 4 WD1639-REF2 FGS POS 1 F583W 1 5 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 5 WD1639-REF3 FGS POS 1 F583W 1 10 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 6 WD1639-REF6 FGS POS 1 F583W 1 10 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 7 WD1639-REF7 FGS POS 1 F583W 1 5 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 8 WD1639+153 FGS POS 1 F583W 1 25 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 9 WD1639-REF1 FGS POS 1 F583W 1 5 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 10 WD1639-REF2 FGS POS 1 F583W 1 5 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 11 WD1639+153 FGS POS 1 F583W 1 25 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 12 WD1639-REF6 FGS POS 1 F583W 1 10 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 01 2 none none none none 1 tbd 01 3 none none none none 1 tbd 01 4 none none none none 1 tbd 01 5 none none none none 1 tbd 01 6 none none none none 1 tbd 01 7 none none none none 1 tbd 01 8 none none none none 1 tbd 01 9 none none none none 1 tbd 10108( 4) - 06/14/04 17:05 - [ 6] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 01 10 none none none none 1 tbd 01 11 none none none none 1 tbd 01 12 none none none none 1 tbd 10108( 4) - 06/14/04 17:05 - [ 7] Visit: 02 Visit Priority: Visit Requirements: PCS MODE FINE; SCHED 30%; ORIENT 294.0D TO 296.0 D; BETWEEN 02-FEB- 2005:00:00:00 AND 09-FEB-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 WD1639+153 FGS TRANS 1 F583W STEP-SIZE=0.5,SCANS=25 1 775 S POS TARG 0, 0; SEQ 1-12 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 WD1639+153 FGS POS 1 F583W 1 25 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 WD1639-REF1 FGS POS 1 F583W 1 5 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 4 WD1639-REF2 FGS POS 1 F583W 1 5 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 5 WD1639-REF3 FGS POS 1 F583W 1 8 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 6 WD1639-REF6 FGS POS 1 F583W 1 8 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 7 WD1639-REF7 FGS POS 1 F583W 1 5 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 8 WD1639+153 FGS POS 1 F583W 1 25 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 9 WD1639-REF1 FGS POS 1 F583W 1 5 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 10 WD1639-REF2 FGS POS 1 F583W 1 5 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 11 WD1639+153 FGS POS 1 F583W 1 25 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 12 WD1639-REF6 FGS POS 1 F583W 1 8 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 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 02 2 none none none none 1 tbd 02 3 none none none none 1 tbd 02 4 none none none none 1 tbd 02 5 none none none none 1 tbd 02 6 none none none none 1 tbd 02 7 none none none none 1 tbd 02 8 none none none none 1 tbd 02 9 none none none none 1 tbd 10108( 4) - 06/14/04 17:05 - [ 8] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 02 10 none none none none 1 tbd 02 11 none none none none 1 tbd 02 12 none none none none 1 tbd 10108( 4) - 06/14/04 17:05 - [ 9] Visit: 03 Visit Priority: Visit Requirements: PCS MODE FINE; SCHED 30%; ORIENT 60.0D TO 65.0 D; BETWEEN 27-OCT- 2004:00:00:00 AND 05-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 WD1818+126 FGS TRANS 1 F583W STEP-SIZE=0.4,SCANS=20 1 880 S POS TARG 0, 0; SEQ 1-12 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 WD1818+126 FGS POS 1 F583W 1 25 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 WD1818-GSC1 FGS POS 1 F583W 1 10 S SAME POS AS 1 -REF1 ------------------------------------------------------------------------------------------------------------------------------------ 4 WD1818-GSC1 FGS POS 1 F583W 1 10 S SAME POS AS 1 -REF2 ------------------------------------------------------------------------------------------------------------------------------------ 5 WD1818-GSC1 FGS POS 1 F583W 1 10 S SAME POS AS 1 -REF3 ------------------------------------------------------------------------------------------------------------------------------------ 6 WD1818-GSC2 FGS POS 1 F583W 1 15 S SAME POS AS 1 -REF1 ------------------------------------------------------------------------------------------------------------------------------------ 7 WD1818-GSC2 FGS POS 1 F583W 1 15 S SAME POS AS 1 -REF2 ------------------------------------------------------------------------------------------------------------------------------------ 8 WD1818-GSC1 FGS POS 1 F583W 1 10 S SAME POS AS 1 -REF2 ------------------------------------------------------------------------------------------------------------------------------------ 9 WD1818-GSC2 FGS POS 1 F583W 1 15 S SAME POS AS 1 -REF3 ------------------------------------------------------------------------------------------------------------------------------------ 10 WD1818-GSC2 FGS POS 1 F583W 1 15 S SAME POS AS 1 -REF4 ------------------------------------------------------------------------------------------------------------------------------------ 11 WD1818+126 FGS POS 1 F583W 1 25 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 12 WD1818-GSC1 FGS POS 1 F583W 1 10 S SAME POS AS 1 -REF1 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 10108( 4) - 06/14/04 17:05 - [ 10] 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 03 2 none none none none 1 tbd 03 3 none none none none 1 tbd 03 4 none none none none 1 tbd 03 5 none none none none 1 tbd 03 6 none none none none 1 tbd 03 7 none none none none 1 tbd 03 8 none none none none 1 tbd 03 9 none none none none 1 tbd 03 10 none none none none 1 tbd 03 11 none none none none 1 tbd 03 12 none none none none 1 tbd 10108( 4) - 06/14/04 17:05 - [ 11] Visit: 04 Visit Priority: Visit Requirements: PCS MODE FINE; SCHED 30%; ORIENT 245.0D TO 255.0 D; BETWEEN 27-MAR- 2005:00:00:00 AND 07-APR-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 WD1818+126 FGS TRANS 1 F583W STEP-SIZE=0.4,SCANS=20 1 880 S POS TARG 0, 0; SEQ 1-12 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 WD1818+126 FGS POS 1 F583W 1 25 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 WD1818-GSC1 FGS POS 1 F583W 1 10 S SAME POS AS 1 -REF1 ------------------------------------------------------------------------------------------------------------------------------------ 4 WD1818-GSC1 FGS POS 1 F583W 1 10 S SAME POS AS 1 -REF2 ------------------------------------------------------------------------------------------------------------------------------------ 5 WD1818-GSC1 FGS POS 1 F583W 1 10 S SAME POS AS 1 -REF3 ------------------------------------------------------------------------------------------------------------------------------------ 6 WD1818-GSC2 FGS POS 1 F583W 1 15 S SAME POS AS 1 -REF1 ------------------------------------------------------------------------------------------------------------------------------------ 7 WD1818-GSC2 FGS POS 1 F583W 1 15 S SAME POS AS 1 -REF2 ------------------------------------------------------------------------------------------------------------------------------------ 8 WD1818-GSC1 FGS POS 1 F583W 1 10 S SAME POS AS 1 -REF2 ------------------------------------------------------------------------------------------------------------------------------------ 9 WD1818-GSC2 FGS POS 1 F583W 1 15 S SAME POS AS 1 -REF3 ------------------------------------------------------------------------------------------------------------------------------------ 10 WD1818-GSC2 FGS POS 1 F583W 1 15 S SAME POS AS 1 -REF4 ------------------------------------------------------------------------------------------------------------------------------------ 11 WD1818+126 FGS POS 1 F583W 1 25 S SAME POS AS 1 ------------------------------------------------------------------------------------------------------------------------------------ 12 WD1818-GSC1 FGS POS 1 F583W 1 10 S SAME POS AS 1 -REF1 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 10108( 4) - 06/14/04 17:05 - [ 12] 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 04 2 none none none none 1 tbd 04 3 none none none none 1 tbd 04 4 none none none none 1 tbd 04 5 none none none none 1 tbd 04 6 none none none none 1 tbd 04 7 none none none none 1 tbd 04 8 none none none none 1 tbd 04 9 none none none none 1 tbd 04 10 none none none none 1 tbd 04 11 none none none none 1 tbd 04 12 none none none none 1 tbd 10108( 4) - 06/14/04 17:05 - [ 13] Summary Form for Proposal 10108 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations FGS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes TRANS POS ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters STEP-SIZE=0.5 SCANS=25 SCANS=20 STEP-SIZE=0.4 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PCS MODE FINE; SCHED 30%; ORIENT 120.0D TO 120.0 D; BETWEEN 19-AUG-2004 00 00 00 AND 02-SEP-2004 00 00 00 POS TARG 0,-17; SEQ 1-12 NON-INT SAME POS AS 1 PCS MODE FINE; SCHED 30%; ORIENT 294.0D TO 296.0 D; BETWEEN 02-FEB-2005 00 00 00 AND 09-FEB-2005 00 00 00 POS TARG 0, 0; SEQ 1-12 NON-INT PCS MODE FINE; SCHED 30%; ORIENT 60.0D TO 65.0 D; BETWEEN 27-OCT-2004 00 00 00 AND 05-NOV-2004 00 00 00 PCS MODE FINE; SCHED 30%; ORIENT 245.0D TO 255.0 D; BETWEEN 27-MAR-2005 00 00 00 AND 07-APR-2005 00 00 00 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F583W ------------------------------------------------------------------------------------------------------------------------------------ Target Names WD1639+153 WD1639-REF1 WD1639-REF2 WD1639-REF3 WD1639-REF6 WD1639-REF7 WD1818+126 WD1818-GSC1-REF1 WD1818-GSC1-REF2 WD1818-GSC1-REF3 WD1818-GSC2-REF1 WD1818-GSC2-REF2 WD1818-GSC2-REF3 WD1818-GSC2-REF4 ------------------------------------------------------------------------------------------------------------------------------------