Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 3042c Report Date: 09-May-96:17:51 Version: ********** Check-in Date: ********** 1.Proposal Title: UV IMAGING OF SIRIUS B ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID STELLAR POPULATIONS EROS Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone John N. Bahcall INSTITUTE FOR ADVANCED STUDY USA (609) 734-8054 PROFESSOR ------------------------------------------------------------------------------------ 7. Abstract UV imaging observations will be made of the white dwarf companion of Sirius A. ------------------------------------------------------------------------------------ 8. Scientific Key Words: STELLAR POPULATIONS, WHITE DWARFS, SPECTROSCOPY, ABSORPTION LINES ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 1.00 par: 0 10. Num targs pri: 5 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: FOS WF/PC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 3042c PI: John N. Bahcall Proposal Title: UV IMAGING OF SIRIUS B ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ John N. Bahcall INSTITUTE FOR ADVANCED STUDY USA ------------------------------------------------------------------------------------ 3. Description of proposed observations. Sirius be will be observed with the Planetary Camera through the F157W filter. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. HST observations are required in order to observe at the ultraviolet wavelengths where Sirius B puts out most of its energy. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. The data will be made available to all interested parties. ------------------------------------------------------------------------------------ 8. Additional comments or special requests. No support necessary. ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). Computing and research assistance will be provided as necessary. ------------------------------------------------------------------------------------ 11. Address Information Name: JOHN N. BAHCALL Category: PI Institution: INSTITUTE FOR ADVANCED STUDY Address: City: State: Zip Code: Country: Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 3042c [ 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 SIRIUS-A NEARBY STAR RA = 06H 42M 56.71S+/-0.01S, 1950.0 1 V = -1.5 +/- 0.1 DEC = -16D 38' 46.4"+/-0.1" 2 B-V=0.0 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 3042c [ 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 SIRIUS-A PC IMAGE P8 F230W, PRE-FLASH=YES 1 0.5S 1 POS TARG +10,-10 F8ND CR-SPLIT=NO INT ACQ FOR 2-4 SEQ 1-4 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 2 SIRIUS-A PC IMAGE ALL-ND F230W PRE-FLASH=YES 1 0.11S 1 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 3 SIRIUS-A PC IMAGE ALL-ND F230W PRE-FLASH=YES 1 1.0S 1 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 4 SIRIUS-A PC IMAGE ALL-ND F230W PRE-FLASH=YES 1 3.0S 1 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 3042c [ 5] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations PC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters PRE-FLASH=YES CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal for EROS ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 1.00 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category STELLAR POPULATIONS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements POS TARG +10,-10; INT ACQ FOR 2-4; SEQ 1-4 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F230W, F8ND F230W ------------------------------------------------------------------------------------------------------------------------------------ Target Names SIRIUS-A ------------------------------------------------------------------------------------------------------------------------------------