!  File:  1161C.PROP
!  Database:  PEPDB
!  Date:  16-FEB-1994:04:09:28

coverpage:

  title_1:         UV OBSERVATIONS OF THE X-RAY BINARY CYGNUS X-1.
    sci_cat:       STELLAR ASTROPHYSICS
    sci_subcat:    X-RAY BINARIES
    proposal_for:  GTO/HRS
    pi_title:      DR.
    pi_fname:      STEPHEN
    pi_mi:         P.
    pi_lname:      MARAN
    pi_inst:       NASA, GODDARD SPACE FLIGHT CENTER
    pi_country:    USA
    pi_phone:      (301) 286-8607
    keywords_1:    WHITE DWARF STARS, LOCAL INTERSTELLAR MEDIUM,
    keywords_2:    DEUTERIUM
    hours_pri:     1.00
    num_pri:       1
    hrs:           X
    pi_position:   SENIOR STAFF SCIENTI
! end of coverpage

abstract:

    line_1:        This program to obtain spectra of the X-ray binary, Cygnus
    line_2:        X-1. This object represents the prime candidate for
    line_3:        containing a black hole. Spectra will be obtained at phase
    line_4:        0.75 in attempt to better define the nature of the O star
    line_5:        primary. Any apparent abundance peculiarities would signal
    line_6:        an anomalous lower mass for the primary and affect the b-h
    line_7:        interpretation of the unseen compact object in this x-ray
    line_8:        emitting system. Spectra with the G140L and the G160M will
    line_9:        be obtained. The G160M observations will sample the C IV, in
    line_10:       an effort to probe the mass flow in this system.

!
! end of abstract

general_form_proposers:

  lname:           KONDO
    fname:         YOJI
    inst:          NASA, GODDARD SPACE FLIGHT CENTER
    country:       USA

!

  lname:           BRUHWEILER
    fname:         FRED
    mi:            C.
    inst:          CATHOLIC UNIVERSITY OF AMERICA
    country:       USA

!

  lname:           MARAN
    fname:         STEPHEN
    mi:            P.
    inst:          NASA, GODDARD SPACE FLIGHT CENTER
    country:       USA

!
! end of general_form_proposers block

general_form_text:

  question:        3
    section:       1
    line_1:        This is a bright target, so the exposures, all in resolution = 20,000 mode, are
    line_2:        brief, yet yield high signal-to-noise. Exposure meter mode is employed.

!

  question:        4
    section:       1
    line_1:        The GHRS observations will be far superior to those obtained
    line_2:        with the IUE and are the only means of establishing, reliably
    line_3:        the mass function of this system, which has been proposed to
    line_4:        contain a black hole. Moreover, the G160M will provide the
    line_5:        first high resolution data for mass flow (loss) profiles in
    line_6:        this binary.

!

  question:        7
    section:       1
    line_1:        The data will be reduced on the SDAS at the ST ScI and will be analyzed using
    line_2:        institutional computer facilities at NASA-GSFC. F. Bruhweiler is responsible
    line_3:        to the P.I. for the preliminary data reduction.

!

  question:        10
    section:       1
    line_1:        GSFC will provide the services of the two GSFC participants who are GSFC
    line_2:        employees, as well as support through institutional facilities and services,
    line_3:        including computing.

!

  question:        13
    section:       1
    line_1:        Investigation of the UV spectrum of the X-ray binary,
    line_2:        Cyg X-1. Determine, more accurately the mass function,
    line_3:        probe mass flow in the system.

!
!end of general form text

general_form_address:

  lname:           KONDO
    fname:         YOJI
    inst:          NASA, GODDARD SPACE FLIGHT CENTER
    addr_1:        CODE 684
    city:          GREENBELT
    state:         MD
    zip:           20771
    country:       USA
    phone:         (301) 286-6247

!

  lname:           BRUHWEILER
    fname:         FRED
    mi:            C.
    inst:          NASA, GODDARD SPACE FLIGHT CENTER
    addr_1:        CODE 684
    city:          GREENBELT
    state:         MD
    zip:           20771
    country:       USA
    phone:         (301) 286-4659

!

  lname:           MARAN
    fname:         STEPHEN
    mi:            P.
    title:         DR.
    category:      PI
    inst:          NASA, GODDARD SPACE FLIGHT CENTER
    addr_1:        CODE 680
    city:          GREENBELT
    state:         MD
    zip:           20771
    country:       USA
    phone:         (301) 286-8607

!
! end of general_form_address records

fixed_targets:

    targnum:       1
    name_1:        CYG-X-1
    name_2:        HD226868
    descr_1:       X-RAY BINARY
    pos_1:         RA=19H56M28.84S +/-1",
    pos_2:         DEC=+35D03'54.5" +/-1"
    equinox:       1950
    fluxnum_1:     1
    fluxval_1:     V=8.89
    fluxnum_2:     2
    fluxval_2:     F-CONT(1500)=2 E-13

!
! end of fixed targets

! No solar system records found

! No generic target records found

exposure_logsheet:

    linenum:       1.000
    targname:      CYG-X-1
    config:        HRS
    opmode:        ACQ
    aperture:      2.0
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  6M
    fluxnum_1:     1
    priority:      3
    param_1:       SEARCH-SIZE=5,
    param_2:       MAP=END-POINT,
    param_3:       FAINT= 0
    param_4:       LOCATE=NO
    req_1:         ONBOARD ACQ FOR 1.1;
    req_2:         CYCLE 2 /1-3;
    comment_1:     STEP-TIME=0.2 S

!

    linenum:       1.100
    targname:      CYG-X-1
    config:        HRS
    opmode:        ACQ/PEAKUP
    aperture:      2.0
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  73.6S
    fluxnum_1:     1
    priority:      1
    req_1:         ONBOARD ACQ FOR 1.2;
    comment_2:     STEP-TIME=1.6S

!

    linenum:       1.200
    targname:      CYG-X-1
    config:        HRS
    opmode:        ACQ
    aperture:      2.0
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  53.0S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=1,
    param_2:       MAP=END-POINT,
    param_3:       LOCATE=NO,
    param_4:       FAINT=0,
    req_1:         ONBOARD ACQ FOR 2;
    comment_1:     TAKE MAP AFTER CENTERING
    comment_2:     200 MSEC INTEGRATIONS

!

    linenum:       2.000
    targname:      CYG-X-1
    config:        HRS
    opmode:        ACCUM
    aperture:      2.0
    sp_element:    G140L
    wavelength:    1450
    num_exp:       1
    time_per_exp:  258.4S
    s_to_n:        15
    fluxnum_1:     2
    priority:      2

!

    linenum:       3.000
    targname:      CYG-X-1
    config:        HRS
    opmode:        ACCUM
    aperture:      2.0
    sp_element:    G160M
    wavelength:    1550
    num_exp:       4
    time_per_exp:  353.6S
    s_to_n:        9
    fluxnum_1:     2
    priority:      2

!
! end of exposure logsheet

! No scan data records found