5755( 19) - 08/13/96 12:10 - [ 0] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 5755 Version: 19 Check-in Date: 13-Aug-1996 12:05:03 1.Proposal Title: OBSERVATIONS OF THE ECLIPSING MILLISECOND PULSAR SCIENCE OBSERVATIONS OF PROGRAM 2237 ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle BINARIES AND STAR FOR GO/CAR 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: JAY BOOKBINDER CFA ------------------------------------------------------------------------------------ 6. Abstract FRUCHTER ET AL. (1988A) HAVE RECENTLY DISCOVERED A 1.6 MSEC PULSAR (PSR 1957+20) IN A 9.2 HOUR ECLIPSING BINARY SYSTEM. THE UNUSUAL BEHAVIOR OF THE DISPERSION MEASURE AS A FUNCTION OF ORBITAL PHASE, AND THE DISAPPEARANCE OF THE PULSAR SIGNAL FOR 50 MINUTES DURING EACH ORBIT, IMPLIES THAT THE ECLIPSES ARE DUE TO A PULSAR-INDUCED WIND FLOWING OFF OF THE COMPANION. THE OPTICAL COUNTERPART IS A 21ST MAGNITUDE OBJECT WHICH VARIES IN INTENSITY OVER THE BINARY PERIOD; ACCURATE GROUND-BASED OBSERVATIONS ARE PREVENTED BY THE PROXIMITY (0.7") OF A 20TH MAGNITUDE K DWARF. WE PROPOSE TO OBSERVE THE OPTICAL COUNTERPART IN A TWO-PART STUDY. WE PROPOSE TO OBSERVE THE EXPECTED UV LINE EMISSION WITH FOS, ALLOWING FOR AN INTIAL DETERMINATION OF THE TEMPERATURE AND DENSITY STRUCTURE AND ABUNDANCES OF THE WIND THAT IS BEING ABLATED FROM THE COMPANION. STUDY OF THIS UNIQUE SYSTEM HOLDS ENORMOUS POTENTIAL FOR THE UNDERSTANDING OF THE RADIATION FIELD OF A MILLISECOND PULSAR AND THE EVOLUTION OF LMXRBS AND MSPS IN GENERAL. WE EXPECT THESE OBSERVATIONS TO PLACE VERY SIGNIFICANT CONTRAINTS ON MODELS OF THIS UNIQUE OBJECT. ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 5755( 19) - 08/13/96 12:10 - [ 1] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 PSR1957+20- STAR,PULSAR,INTERACTING XI-OFF=-6.815"+/- 0.070",ETA- J2000 B = 21.0+/-0.5 SPEC BINARY,BINARY PULSAR, OFF=5.562"+/- 0.010",FROM 2 V = 20.3+/-0.5 R = 19.4+/-0.5 B-V = 10.0+/-3.0e-1 A(V) = 15.0+/-10.0e-1 E(B-V) = 5.0+/-3.5e-1 Comments: B,V,R,B-V AT MAX. LIGHT TOTAL VARIATION IS +/- 4 MAG, OFFSETS*FROM*TARGET*TO*OFFSET STAR COORDINATES MEASURED FROM WFPC1 DATA 2 SOMESTAR- STAR,MAIN SEQUENCE O, RA=19H 59M 36.296S +/- J2000 V = 16.0+/-0.5 OFFSET 0.010S,DEC=20D 48' 20.03" +/- 0.02",PLATE-ID=02UQ Comments: STAR "B" ON FINDING CHRTS COORDINATES SUPPLIED BY STSCI FROM REDUCTION OF PC V MAXIMUM IMAGE 5755( 19) - 08/13/96 12:10 - [ 2] Visit: 01 Visit Requirements: GROUP 1-3 WITHIN 3 D PERIOD 9.167199083333331 H AND ZERO-PHASE 24-Mar- 1988:14:01:56.0 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 5 SOMESTAR-OF FOS/BL ACQ/PEA 4.3 MIRROR SCAN-STEP-Y=1.23,SCAN-STEP-X=3.3, 1 1 S ONBOARD ACQ FOR 10 FSET K SEARCH-SIZE-Y=6,SEARCH-SIZE-X=2 ------------------------------------------------------------------------------------------------------------------------------------ 10 SOMESTAR-OF FOS/BL ACQ/BIN 4.3 MIRROR 1 6 S ONBOARD ACQ FOR 20 FSET ARY ------------------------------------------------------------------------------------------------------------------------------------ 20 SOMESTAR-OF FOS/BL ACQ/PEA 0.25-PA MIRROR SCAN-STEP-Y=.1,SCAN-STEP-X=.1, 1 1 S ONBOARD ACQ FOR 30-50 FSET K IR-A SEARCH-SIZE-Y=4,SEARCH-SIZE-X=4 ------------------------------------------------------------------------------------------------------------------------------------ 30 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L STEP-PATT=DEF 1 1400 S PHASE 0.4 TO 0.5 SEQ SPEC IR-A 30-40 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 40 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L STEP-PATT=DEF 1 740 S SPEC IR-A ------------------------------------------------------------------------------------------------------------------------------------ 50 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L STEP-PATT=DEF 1 660 S SPEC IR-A ------------------------------------------------------------------------------------------------------------------------------------ 5755( 19) - 08/13/96 12:10 - [ 3] Visit: 02 Visit Requirements: PERIOD 9.167199083333331 H AND ZERO-PHASE 24-Mar-1988:14:01:56.0 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 5 SOMESTAR-OF FOS/BL ACQ/PEA 4.3 MIRROR SCAN-STEP-Y=1.23,SCAN-STEP-X=3.3, 1 1 S ONBOARD ACQ FOR 10 FSET K SEARCH-SIZE-Y=6,SEARCH-SIZE-X=2 ------------------------------------------------------------------------------------------------------------------------------------ 10 SOMESTAR-OF FOS/BL ACQ/BIN 4.3 MIRROR 1 6 S ONBOARD ACQ FOR 20 FSET ARY ------------------------------------------------------------------------------------------------------------------------------------ 20 SOMESTAR-OF FOS/BL ACQ/PEA 0.25-PA MIRROR SCAN-STEP-Y=.1,SCAN-STEP-X=.1, 1 1 S ONBOARD ACQ FOR 30-50 FSET K IR-A SEARCH-SIZE-Y=4,SEARCH-SIZE-X=4 ------------------------------------------------------------------------------------------------------------------------------------ 30 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L 1 1400 S PHASE 0.6 TO 0.7 SEQ SPEC IR-A 30-40 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 40 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L 1 740 S SPEC IR-A ------------------------------------------------------------------------------------------------------------------------------------ 50 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L 1 660 S SPEC IR-A ------------------------------------------------------------------------------------------------------------------------------------ 5755( 19) - 08/13/96 12:10 - [ 4] Visit: 03 Visit Requirements: PERIOD 9.167199083333331 H AND ZERO-PHASE 24-Mar-1988:14:01:56.0 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 5 SOMESTAR-OF FOS/BL ACQ/PEA 4.3 MIRROR SCAN-STEP-Y=1.23,SCAN-STEP-X=3.3, 1 1 S ONBOARD ACQ FOR 10 FSET K SEARCH-SIZE-Y=6,SEARCH-SIZE-X=2 ------------------------------------------------------------------------------------------------------------------------------------ 10 SOMESTAR-OF FOS/BL ACQ/BIN 4.3 MIRROR 1 6 S ONBOARD ACQ FOR 20 FSET ARY ------------------------------------------------------------------------------------------------------------------------------------ 20 SOMESTAR-OF FOS/BL ACQ/PEA 0.25-PA MIRROR SCAN-STEP-Y=.1,SCAN-STEP-X=.1, 1 1 S ONBOARD ACQ FOR 30-50 FSET K IR-A SEARCH-SIZE-Y=4,SEARCH-SIZE-X=4 ------------------------------------------------------------------------------------------------------------------------------------ 30 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L 1 1400 S PHASE 0.8 TO 0.9 SEQ SPEC IR-A 30-40 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 40 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L 1 740 S SPEC IR-A ------------------------------------------------------------------------------------------------------------------------------------ 50 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L 1 660 S SPEC IR-A ------------------------------------------------------------------------------------------------------------------------------------ 5755( 19) - 08/13/96 12:10 - [ 5] Visit: 04 Visit Requirements: GROUP 04,05 WITHIN 2 D AFTER 03 BY 5 D PERIOD 9.167199083333331 H AND ZERO- PHASE 24-Mar-1988:14:01:56.0 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 5 SOMESTAR-OF FOS/BL ACQ/PEA 4.3 MIRROR SCAN-STEP-Y=1.23,SCAN-STEP-X=3.3, 1 1 S ONBOARD ACQ FOR 10 FSET K SEARCH-SIZE-Y=6,SEARCH-SIZE-X=2 ------------------------------------------------------------------------------------------------------------------------------------ 10 SOMESTAR-OF FOS/BL ACQ/BIN 4.3 MIRROR 1 6 S ONBOARD ACQ FOR 20 FSET ARY ------------------------------------------------------------------------------------------------------------------------------------ 20 SOMESTAR-OF FOS/BL ACQ/PEA 0.25-PA MIRROR SCAN-STEP-Y=.1,SCAN-STEP-X=.1, 1 1 S ONBOARD ACQ FOR 30-50 FSET K IR-A SEARCH-SIZE-Y=4,SEARCH-SIZE-X=4 ------------------------------------------------------------------------------------------------------------------------------------ 30 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L 1 1400 S PHASE 0.6 TO 0.7 SEQ SPEC IR-A 30-40 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 40 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L 1 740 S SPEC IR-A ------------------------------------------------------------------------------------------------------------------------------------ 50 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L 1 660 S SPEC IR-A ------------------------------------------------------------------------------------------------------------------------------------ 5755( 19) - 08/13/96 12:10 - [ 6] Visit: 05 Visit Requirements: PERIOD 9.167199083333331 H AND ZERO-PHASE 24-Mar-1988:14:01:56.0 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 5 SOMESTAR-OF FOS/BL ACQ/PEA 4.3 MIRROR SCAN-STEP-X=3.3,SCAN-STEP-Y=1.23, 1 1 S ONBOARD ACQ FOR 10 FSET K SEARCH-SIZE-X=2,SEARCH-SIZE-Y=6 ------------------------------------------------------------------------------------------------------------------------------------ 10 SOMESTAR-OF FOS/BL ACQ/BIN 4.3 MIRROR 1 6 S ONBOARD ACQ FOR 20 FSET ARY ------------------------------------------------------------------------------------------------------------------------------------ 20 SOMESTAR-OF FOS/BL ACQ/PEA 0.25-PA MIRROR SCAN-STEP-X=.1,SCAN-STEP-Y=.1, 1 1 S ONBOARD ACQ FOR 30-50 FSET K IR-A SEARCH-SIZE-X=4,SEARCH-SIZE-Y=4 ------------------------------------------------------------------------------------------------------------------------------------ 30 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L 1 1400 S PHASE 0.6 TO 0.7 SEQ SPEC IR-A 30-40 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 40 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L 1 740 S SPEC IR-A ------------------------------------------------------------------------------------------------------------------------------------ 50 PSR1957+20- FOS/BL ACCUM 0.25-PA G160L 1 660 S SPEC IR-A ------------------------------------------------------------------------------------------------------------------------------------ 5755( 19) - 08/13/96 12:10 - [ 7] Summary Form for Proposal 5755 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/BL ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/PEAK ACQ/BINARY ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SCAN-STEP-Y=1.23 SCAN-STEP-X=3.3 SEARCH-SIZE-Y=6 SEARCH-SIZE-X=2 SEARCH-SIZE-X=4 STEP-PATT=DEF SEARCH-SIZE-Y=4 SCAN-STEP-X=.1 SCAN-STEP-Y=.1 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO/CAR ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category BINARIES AND STAR FORMATION ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GROUP 1-3 WITHIN 3 D PERIOD 9.167199083333331 H AND ZERO-PHASE 24-Mar-1988 14 01 56.0 ONBOARD ACQ FOR 10 ONBOARD ACQ FOR 20 ONBOARD ACQ FOR 30-50 PHASE 0.4 TO 0.5 SEQ 30-40 NON-INT PHASE 0.6 TO 0.7 SEQ 30-40 NON-INT PHASE 0.8 TO 0.9 SEQ 30-40 NON-INT GROUP 04,05 WITHIN 2 D AFTER 03 BY 5 D PERIOD 9.167199083333331 H AND ZERO-PHASE 24-Mar-1988 14 01 56.0 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G160L ------------------------------------------------------------------------------------------------------------------------------------ Target Names SOMESTAR-OFFSET PSR1957+20-SPEC ------------------------------------------------------------------------------------------------------------------------------------