Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 1049c Report Date: 09-May-96:16:05 Version: ********** Check-in Date: ********** 1.Proposal Title: SPECTROPOLARIMETRY OF MAGNETIC WHITE DWARFS -- CYCLE 1 ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID STELLAR ASTROPHYSICS GTO/FOS Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Prof. J. roger P Angel UNIVERSITY OF ARIZONA USA 602-621-6541 PROF. OF ASTRONOMY ------------------------------------------------------------------------------------ 7. Abstract Spectropolarimetry and spectrophotometry will be used to study the ultraviolet Zeeman spectra of magnetic white dwarfs with fields in excess of 20 MG. ------------------------------------------------------------------------------------ 8. Scientific Key Words: WHITE DWARFS, HIGH MAGNETIC FIELDS ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 10.70 par: 0 10. Num targs pri: 5 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: FOS ------------------------------------------------------------------------------------ 12. Special sched req: Time Critical obs. ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 1049c PI: Prof. J. roger P Angel Proposal Title: SPECTROPOLARIMETRY OF MAGNETIC WHITE DWARFS -- CYCLE 1 ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Dr. Edward Beaver UC, SAN DIEGO USA Dr. E. Margaret Burbidge UC, SAN DIEGO USA Dr. Bruce Margon UNIVERSITY OF WASHINGTON USA Dr. J. Roger P Angel UNIVERSITY OF ARIZONA USA Dr. Holland C Ford JOHNS HOPKINS UNIVERSITY USA Dr. Frank Bartko MARTIN MARIETTA CORPORATION USA Dr. Arthur F Davidsen JOHNS HOPKINS UNIVERSITY USA Dr. Richard J Harms APPLIED RESEARCH CORPORATION USA Dr. Ralph Bohlin SPACE TELESCOPE SCIENCE USA INSTITUTE ------------------------------------------------------------------------------------ 3. Description of proposed observations. Three magnetic white dwarfs will be observed with the FOS spectropolarimeter. A fourth star with a very short period will be observed spectroscopically. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. All observations below 3000A. All objects have been well observed to limits of ground-based telescopes and IUE. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. Two of the four are variables, and need coverage over their rotation periods. The SV prerequisite programs for all FOS observations in this program are: Prop ID 2195 FOS Target Acquisition Tests All observations Prop ID 1317 Int./Ext. Wavelength Offsets 1st target Prop ID 1318 Spectral Flat Fields 1st target Prop ID 1320 Absolute Spectrophotometry 1st visit of bright targets Prop ID 1430 Polarimetric Calibration All observations ------------------------------------------------------------------------------------ 13. Ultraviolet spectropolarimetry and spectrophotometry of magnetic white dwarfs, to study effects of strong fields on continuum and lines, particularly Lalpha. Four objects will be observed, Grw +70degrees8247, GD 229, PG 1031+23 and Feige 7. ------------------------------------------------------------------------------------ 11. Address Information Name: RICHARD ALLEN Category: CON Institution: STEWARD OBSERVATORY Address: City: TUCSON State: AZ Zip Code: 85721 Country: USA Telephone: 602-621-7661 Telex (or e-mail): 467175 ------------------------------------------------------------------------------------ Name: J. ROGER P ANGEL Category: PI Institution: STEWARD OBSERVATORY Address: UNIVERSITY OF ARIZONA City: TUCSON State: AZ Zip Code: 85721 Country: USA Telephone: 602-621-6541 Telex (or e-mail): 467175 ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 1049c [ 3] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial |Acqui|FLX| Flux data No | Name | Description | Position |Eqnx | Vel. |Prblm|REF| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 1 GRW+70-8247 MAGNETIC WHITE DWARF RA=19H 00M 9.97S +/- 1", 2000 1 V=13.19 +/- 0.3 DEC=70D 39' 43.2" +/- 1", PLATE-ID=00MA Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J 1983.40 0.0061 +/- 0.0002 0.5140 +/- 0.0030 0.0000 +/- 0.0000 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 1049c [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 GRW+70-8247 FOS/BL ACQ/ 4.3 MIRROR BRIGHT=720000 1 2.2S 2 CYCLE 1 / 1-4 BINARY SEQ 1-4 NO GAP ONBOARD ACQ FOR 2- 4 ------------------------------------------------------------------------------------------------------------------------------------ 2 GRW+70-8247 FOS/BL ACCUM 4.3 G270H 2227- 1 300S 2 3306 ------------------------------------------------------------------------------------------------------------------------------------ 3 GRW+70-8247 FOS/BL ACCUM 4.3 G190H 1900 1 1200S 2 ------------------------------------------------------------------------------------------------------------------------------------ 4 GRW+70-8247 FOS/BL ACCUM 4.3 G130H 1150- POLSCAN=8B 8 1440S 2 1608 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 1049c [ 5] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/BL ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/BINARY ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BRIGHT=720000 POLSCAN=8B ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GTO/FOS ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 10.70 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category STELLAR ASTROPHYSICS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 1 / 1-4; SEQ 1-4 NO GAP; ONBOARD ACQ FOR 2-4 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G270H G190H G130H ------------------------------------------------------------------------------------------------------------------------------------ Target Names GRW+70-8247 ------------------------------------------------------------------------------------------------------------------------------------