Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 1098c Report Date: 09-May-96:16:09 Version: ********** Check-in Date: ********** 1.Proposal Title: REMNANT STARS IN SUPERNOVA REMNANTS ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID STELLAR ASTROPHYSICS GTO/HSP Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Robert C. Bless WISCONSIN, UNIVERSITY OF USA (608)262-1715 ------------------------------------------------------------------------------------ 7. Abstract In this proposal we will search for a remnant star associated with SN1987A. Once detected, we will study the photometric variability in an attempt to place important constraints on the mechanisms by which neutron stars originate. REVISION HISTORY: Created 11/18/91; ------------------------------------------------------------------------------------ 8. Scientific Key Words: SUPERNOVA REMNANTS; NEUTRON STARS ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 20.00 par: 0 10. Num targs pri: 10 par: 0 ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 1098c PI: Robert C. Bless Proposal Title: REMNANT STARS IN SUPERNOVA REMNANTS ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Robert C. Bless WISCONSIN, UNIVERSITY OF USA Joseph F. Dolan NASA, GODDARD SPACE FLIGHT USA CENTER James L. Elliot MASSACHUSETTS INSTITUTE OF USA TECHNOLOGY Edward L. Robinson TEXAS, UNIVERSITY OF USA Richard L. White SPACE TELESCOPE SCIENCE USA INSTITUTE G. W. Van Citters NATIONAL SCIENCE FOUNDATION USA ------------------------------------------------------------------------------------ 3. Description of proposed observations. A search for the remnant star associated with SN1987A will be conducted. We will use the 6.0" finding aperture on the POL tube. An observation will be made every 6 months until the pulsar is detected. Each observation will be searched for pulsations using FFT methods. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. Remnant stars are known from presently available upper limits on most SNR central stars to be fainter than V = 20; HST is required for this proposal for the following reasons: (a) Scintillation does not contaminate the data and hence pulses in the remnant star will be easier to detect. (b) Smaller apertures can be used with HST minimizing the contamination from the background. (c) A long passband (1600-7000 A) can be used which will maximize the number of photons detected. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. The HSP wide bandwidth photometric observations of SN1987A will be analyzed by power spectrum analysis methods to determine if any pulsation exists (as it does in the Crab Nebula and 1E2259+586). Photometric observations will also be analyzed for longer periodicities which may be present in the light curve. The results will be applied to determining the location, geometry, and motion of the emitting regions. ------------------------------------------------------------------------------------ 11. Address Information Name: ROBERT C. BLESS Category: PI Institution: UNIVERSITY OF WISCONSIN Address: SPACE ASTRONOMY LAB. City: MADISON State: WI Zip Code: 53706 Country: USA Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ Name: JOSEPH F. DOLAN Category: CON Institution: NASA, GODDARD SPACE FLIGHT CENTER Address: CODE 681 City: GREENBELT State: MD Zip Code: 20771 Country: USA Telephone: (301)286-5920 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 1098c [ 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 GSC9162.0107 OFFSET TARGET FOR RA = 05H 35M 13.266S +/- 2000 1 V=12.52 2 SN1987A 0.037S, DEC = -69D 14' 35.315" +/- 0.2" Comments: POSREF = TAYLOR. POSREF FROM WEST, ET AL. A & A 177.L1 (1987). ------------------------------------------------------------------------------------------------------------------------------------ 2 SN1987A SUPERNOVA IN LMC RA-OFF = 14.741S +/- 0.037S, 2000 1 V=20 DEC-OFF = -96.318" +/- 0.2", FROM 1 Comments: POSREF = JDOLAN, POSREF FROM GIRARD,VAN ALTENA AND LOPEZ, ASTRON. J.,V95,58,1988. RA = 05H 35M 28.007S +/- 0.005S. DEC = - 69D 16' 11.633" +/- 0.03". ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 1098c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 9 DEFINE # HSP/ SINGLE 6.0 F160LP SAMPLE- 1 40M # GUID TOL .021" / FFT POL TIME=0.0001 9.000-55.000 DATA- RT ANALYSIS FORMAT=BYTE PRECISION=HIGH Comments: EXPOSURE TIME=40M OR MAXIMUM TIME POSSIBLE IN ONE ORBIT. TDRSS DOWNLINK REQUIRED. ------------------------------------------------------------------------------------------------------------------------------------ 48 GSC9162.010 HSP/ ACQ 1 40S 1 1 CYCLE 0 / 48-49 72 POL ONBOARD ACQ FOR 49 Comments: NOTE: SAMPLE-TIME=0.1S. ------------------------------------------------------------------------------------------------------------------------------------ 49 USE FFT SN1987A ^ ------------------------------------------------------------------------------------------------------------------------------------ 50 GSC9162.010 HSP/ ACQ 1 40S 1 1 ONBOARD ACQ FOR 51 72 POL CYCLE 1 / 50- 53.000 Comments: NOTE: SAMPLE-TIME=0.1S. ------------------------------------------------------------------------------------------------------------------------------------ 51 USE FFT SN1987A ^ AFTER 49 BY 180D + /- 30D ------------------------------------------------------------------------------------------------------------------------------------ 52 GSC9162.010 HSP/ ACQ 1 40S 1 1 ONBOARD ACQ FOR 72 POL 53.000 Comments: NOTE: SAMPLE-TIME=0.1S. ------------------------------------------------------------------------------------------------------------------------------------ 53 USE FFT SN1987A ^ AFTER 49 BY 360D + /- 30D ------------------------------------------------------------------------------------------------------------------------------------ 54 GSC9162.010 HSP/ ACQ 1 40S 1 1 ONBOARD ACQ FOR 72 POL 55.000 CYCLE 2 / 54-55 Comments: NOTE: SAMPLE-TIME=0.1S. ------------------------------------------------------------------------------------------------------------------------------------ 55 USE FFT SN1987A ^ AFTER 49 BY 540D + /- 30D ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 1098c [ 5] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations HSP/POL ------------------------------------------------------------------------------------------------------------------------------------ Opmodes SINGLE ACQ ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SAMPLE-TIME=0.0001 DATA-FORMAT=BYTE PRECISION=HIGH ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GTO/HSP ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 20.00 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category STELLAR ASTROPHYSICS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GUID TOL .021" /9.000-55.000; RT ANALYSIS CYCLE 0 / 48-49; ONBOARD ACQ FOR 49; ONBOARD ACQ FOR 51; CYCLE 1 / 50-53.000; AFTER 49 BY 180D +/- 30D; ONBOARD ACQ FOR 53.000; AFTER 49 BY 360D +/- 30D; ONBOARD ACQ FOR 55.000; CYCLE 2 / 54-55; AFTER 49 BY 540D +/- 30D; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160LP ------------------------------------------------------------------------------------------------------------------------------------ Target Names GSC9162.01072 SN1987A ------------------------------------------------------------------------------------------------------------------------------------