! +====================+ ! | PED OUTPUT PRODUCT | ! +====================+ ! ! /spectre/data1/aroman/proposals/5755.prop ! Generated by PREPROCESSOR, version 6.4a ! Date: Tue Aug 13 12:03:15 EDT 1996 Proposal_Information Title: OBSERVATIONS OF THE ECLIPSING MILLISECOND PULSAR SCIENCE OBSERVATIONS OF PROGRAM 2237 Proposal_Category: GO/CAR Scientific_Category: BINARIES AND STAR FORMATION Cycle: 5 Investigators PI_Name: JAY BOOKBINDER PI_Institution: SMITHSONIAN ASTROPHYSICAL OBSERVATORY 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. Questions Observing_Description: Real_Time_Justification: Calibration_Justification: Additional_Comments: Fixed_Targets Target_Number: 1 Target_Name: PSR1957+20-SPEC Alternate_Names: ECLIPSING-MILLISECOND-PULSAR Description: STAR,PULSAR,INTERACTING BINARY,BINARY PULSAR, Position: XI-OFF=-6.815"+/- 0.070",ETA-OFF=5.562"+/- 0.010",FROM 2 Equinox: J2000 RV_or_Z: RA_PM: 0.0 Dec_PM: 0.0 Epoch: Annual_Parallax: 0.0 Flux: B = 21.0+/-0.5 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 Target_Number: 2 Target_Name: SOMESTAR-OFFSET Alternate_Names: Description: STAR,MAIN SEQUENCE O, Position: RA=19H 59M 36.296S +/- 0.010S,DEC=20D 48' 20.03" +/- 0.02",PLATE-ID=02UQ Equinox: J2000 RV_or_Z: RA_PM: 0.0 Dec_PM: 0.0 Epoch: Annual_Parallax: 0.0 Flux: V = 16.0+/-0.5 Comments: STAR "B" ON FINDING CHRTS COORDINATES SUPPLIED BY STSCI FROM REDUCTION OF PC V MAXIMUM IMAGE Solar_System_Targets Generic_Targets Scan_Data Visits Visit_Number: 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: Visit_Comments: Exposure_Number: 5 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/PEAK Aperture: 4.3 Sp_Element: MIRROR Wavelength: Optional_Parameters: SCAN-STEP-Y=1.23,SCAN-STEP-X=3.3,SEARCH-SIZE-Y=6,SEARCH-SIZE-X=2 Number_of_Iterations: 1 Time_Per_Exposure: 1 S Special_Requirements: ONBOARD ACQ FOR 10 Comments: Exposure_Number: 10 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/BINARY Aperture: 4.3 Sp_Element: MIRROR Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 6 S Special_Requirements: ONBOARD ACQ FOR 20 Comments: Exposure_Number: 20 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/PEAK Aperture: 0.25-PAIR-A Sp_Element: MIRROR Wavelength: Optional_Parameters: SCAN-STEP-Y=.1,SCAN-STEP-X=.1,SEARCH-SIZE-Y=4,SEARCH-SIZE-X=4 Number_of_Iterations: 1 Time_Per_Exposure: 1 S Special_Requirements: ONBOARD ACQ FOR 30-50 Comments: Exposure_Number: 30 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: STEP-PATT=DEF Number_of_Iterations: 1 Time_Per_Exposure: 1400 S Special_Requirements: PHASE 0.4 TO 0.5 SEQ 30-40 NON-INT Comments: Exposure_Number: 40 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: STEP-PATT=DEF Number_of_Iterations: 1 Time_Per_Exposure: 740 S Special_Requirements: Comments: Exposure_Number: 50 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: STEP-PATT=DEF Number_of_Iterations: 1 Time_Per_Exposure: 660 S Special_Requirements: Comments: Visit_Number: 02 Visit_Requirements: PERIOD 9.167199083333331 H AND ZERO-PHASE 24-Mar-1988:14:01:56.0 On_Hold_Comments: Visit_Comments: Exposure_Number: 5 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/PEAK Aperture: 4.3 Sp_Element: MIRROR Wavelength: Optional_Parameters: SCAN-STEP-Y=1.23,SCAN-STEP-X=3.3,SEARCH-SIZE-Y=6,SEARCH-SIZE-X=2 Number_of_Iterations: 1 Time_Per_Exposure: 1 S Special_Requirements: ONBOARD ACQ FOR 10 Comments: Exposure_Number: 10 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/BINARY Aperture: 4.3 Sp_Element: MIRROR Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 6 S Special_Requirements: ONBOARD ACQ FOR 20 Comments: Exposure_Number: 20 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/PEAK Aperture: 0.25-PAIR-A Sp_Element: MIRROR Wavelength: Optional_Parameters: SCAN-STEP-Y=.1,SCAN-STEP-X=.1,SEARCH-SIZE-Y=4,SEARCH-SIZE-X=4 Number_of_Iterations: 1 Time_Per_Exposure: 1 S Special_Requirements: ONBOARD ACQ FOR 30-50 Comments: Exposure_Number: 30 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1400 S Special_Requirements: PHASE 0.6 TO 0.7 SEQ 30-40 NON-INT Comments: Exposure_Number: 40 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 740 S Special_Requirements: Comments: Exposure_Number: 50 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 660 S Special_Requirements: Comments: Visit_Number: 03 Visit_Requirements: PERIOD 9.167199083333331 H AND ZERO-PHASE 24-Mar-1988:14:01:56.0 On_Hold_Comments: Visit_Comments: Exposure_Number: 5 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/PEAK Aperture: 4.3 Sp_Element: MIRROR Wavelength: Optional_Parameters: SCAN-STEP-Y=1.23,SCAN-STEP-X=3.3,SEARCH-SIZE-Y=6,SEARCH-SIZE-X=2 Number_of_Iterations: 1 Time_Per_Exposure: 1 S Special_Requirements: ONBOARD ACQ FOR 10 Comments: Exposure_Number: 10 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/BINARY Aperture: 4.3 Sp_Element: MIRROR Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 6 S Special_Requirements: ONBOARD ACQ FOR 20 Comments: Exposure_Number: 20 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/PEAK Aperture: 0.25-PAIR-A Sp_Element: MIRROR Wavelength: Optional_Parameters: SCAN-STEP-Y=.1,SCAN-STEP-X=.1,SEARCH-SIZE-Y=4,SEARCH-SIZE-X=4 Number_of_Iterations: 1 Time_Per_Exposure: 1 S Special_Requirements: ONBOARD ACQ FOR 30-50 Comments: Exposure_Number: 30 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1400 S Special_Requirements: PHASE 0.8 TO 0.9 SEQ 30-40 NON-INT Comments: Exposure_Number: 40 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 740 S Special_Requirements: Comments: Exposure_Number: 50 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 660 S Special_Requirements: Comments: Visit_Number: 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: Visit_Comments: Exposure_Number: 5 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/PEAK Aperture: 4.3 Sp_Element: MIRROR Wavelength: Optional_Parameters: SCAN-STEP-Y=1.23,SCAN-STEP-X=3.3,SEARCH-SIZE-Y=6,SEARCH-SIZE-X=2 Number_of_Iterations: 1 Time_Per_Exposure: 1 S Special_Requirements: ONBOARD ACQ FOR 10 Comments: Exposure_Number: 10 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/BINARY Aperture: 4.3 Sp_Element: MIRROR Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 6 S Special_Requirements: ONBOARD ACQ FOR 20 Comments: Exposure_Number: 20 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/PEAK Aperture: 0.25-PAIR-A Sp_Element: MIRROR Wavelength: Optional_Parameters: SCAN-STEP-Y=.1,SCAN-STEP-X=.1,SEARCH-SIZE-Y=4,SEARCH-SIZE-X=4 Number_of_Iterations: 1 Time_Per_Exposure: 1 S Special_Requirements: ONBOARD ACQ FOR 30-50 Comments: Exposure_Number: 30 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1400 S Special_Requirements: PHASE 0.6 TO 0.7 SEQ 30-40 NON-INT Comments: Exposure_Number: 40 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 740 S Special_Requirements: Comments: Exposure_Number: 50 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 660 S Special_Requirements: Comments: Visit_Number: 05 Visit_Requirements: PERIOD 9.167199083333331 H AND ZERO-PHASE 24-Mar-1988:14:01:56.0 On_Hold_Comments: Visit_Comments: Exposure_Number: 5 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/PEAK Aperture: 4.3 Sp_Element: MIRROR Wavelength: Optional_Parameters: SCAN-STEP-X=3.3,SCAN-STEP-Y=1.23,SEARCH-SIZE-X=2,SEARCH-SIZE-Y=6 Number_of_Iterations: 1 Time_Per_Exposure: 1 S Special_Requirements: ONBOARD ACQ FOR 10 Comments: Exposure_Number: 10 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/BINARY Aperture: 4.3 Sp_Element: MIRROR Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 6 S Special_Requirements: ONBOARD ACQ FOR 20 Comments: Exposure_Number: 20 Target_Name: SOMESTAR-OFFSET Config: FOS/BL Opmode: ACQ/PEAK Aperture: 0.25-PAIR-A Sp_Element: MIRROR Wavelength: Optional_Parameters: SCAN-STEP-X=.1,SCAN-STEP-Y=.1,SEARCH-SIZE-X=4,SEARCH-SIZE-Y=4 Number_of_Iterations: 1 Time_Per_Exposure: 1 S Special_Requirements: ONBOARD ACQ FOR 30-50 Comments: Exposure_Number: 30 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1400 S Special_Requirements: PHASE 0.6 TO 0.7 SEQ 30-40 NON-INT Comments: Exposure_Number: 40 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 740 S Special_Requirements: Comments: Exposure_Number: 50 Target_Name: PSR1957+20-SPEC Config: FOS/BL Opmode: ACCUM Aperture: 0.25-PAIR-A Sp_Element: G160L Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 660 S Special_Requirements: Comments: Data_Distribution ! Defaults indicated; change if desired Medium: 8MM Blocking_Factor: 10 Ship_To: PI_Address Ship_Via: UPS Recipient_Email: ! Let us know what you think of this template and software! ! Please send a list of your likes and dislikes to your Program Coordinator