!  File:  3255C.PROP
!  Database:  PEPDB
!  Date:  19-FEB-1994:00:07:58

coverpage:

  title_1:         SEARCH FOR OPTICAL VARIABILITY ASSOCIATED WITH BLACK HOLES
    sci_cat:       STELLAR ASTROPHYSICS
    proposal_for:  GTO/HSP
    cont_id:       3255
    pi_fname:      ROBERT
    pi_mi:         C.
    pi_lname:      BLESS
    pi_inst:       WISCONSIN, UNIVERSITY OF
    pi_country:    USA
    pi_phone:      (608) 262-1715
    keywords_1:    VARIABLE, INTERACTING BINARIES, BLACK HOLES
    hours_pri:     14.45
    num_pri:       4
! end of coverpage

abstract:

    line_1:        It has been suggested that luminous matter passing
    line_2:        through an accretion disk towards the event horizon
    line_3:        of a black hole is likely to emit a short series of
    line_4:        pulses at an increasing frequency. These so-called
    line_5:        dying pulses trains would have a period of the order
    line_6:        of milliseconds for stellar mass black holes. A
    line_7:        search for such pulse trains will be made among 3
    line_8:        candidate objects.  Revision History: based on 1094
    line_9:        targets from 3255 with LMCX-3 replaced with V404
    line_10:       Cyg--MJN 3/19/92;

!
! end of abstract

general_form_proposers:

  lname:           VAN CITTERS
    fname:         G.
    mi:            W.
    inst:          NATIONAL SCIENCE FOUNDATION
    country:       USA

!

  lname:           BLESS
    fname:         ROBERT
    mi:            C.
    inst:          WISCONSIN, UNIVERSITY OF
    country:       USA

!

  lname:           DOLAN
    fname:         JOSEPH
    mi:            F.
    inst:          NASA, GODDARD SPACE FLIGHT CENTER
    country:       USA

!

  lname:           ELLIOT
    fname:         JAMES
    mi:            L.
    inst:          MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    country:       USA

!

  lname:           ROBINSON
    fname:         EDWARD
    mi:            L.
    inst:          TEXAS, UNIVERSITY OF
    country:       USA

!

  lname:           WHITE
    fname:         RICHARD
    mi:            L.
    inst:          SPACE TELESCOPE SCIENCE INSTITUTE
    country:       USA

!
! end of general_form_proposers block

general_form_text:

  question:        3
    section:       1
    line_1:        Each object would be monitored for 30 minutes to an
    line_2:        hour using about 100 microsec integration times with
    line_3:        a broad filter. Each target should be observed more
    line_4:        than once (during different x-ray intensity states,
    line_5:        for example).

!

  question:        4
    section:       1
    line_1:        ST is required in order to eliminate atmospheric
    line_2:        noise, to observe in the UV where burst amplitudes
    line_3:        are expected to be larger than in the visual, and to
    line_4:        be able to use small apertures.

!

  question:        13
    section:       1
    line_1:        A search is to be made in black hole candidate
    line_2:        objects for "dying pulse trains" indicative of
    line_3:        matter spiraling towards the event horizon of a
    line_4:        black hole.

!
!end of general form text

general_form_address:

  lname:           BLESS
    fname:         ROBERT
    mi:            C.
    category:      PI
    inst:          UNIVERSITY OF WISCONSIN
    addr_1:        SPACE ASTRONOMY LAB.
    addr_2:        1150 UNIVERSITY AVE.
    city:          MADISON
    state:         WI
    zip:           53706
    country:       USA
    phone:         (608) 262-1715

!
! end of general_form_address records

fixed_targets:

    targnum:       2
    name_1:        A0620-00
    descr_1:       X-RAY BINARY
    pos_1:         RA = 06H 22M 44.454S +/- 1.0",
    pos_2:         DEC = -00D 20' 44.722" +/- 1.0"
    equinox:       2000
    comment_1:     POSREF = ROBINSON
    fluxnum_1:     1
    fluxval_1:     V = 17.8
    fluxnum_2:     1
    fluxval_2:     V = 11.2

!

    targnum:       3
    name_1:        V404CYG
    descr_1:       X-RAY BINARY
    pos_1:         RA = 20H 24M 03.832S +/- 0.2",
    pos_2:         DEC = +33D 52' 02.574" +/- 0.2"
    equinox:       2000
    comment_1:     POSREF = ROBINSON
    fluxnum_1:     1
    fluxval_1:     V = 12.6

!
! end of fixed targets

! No solar system records found

! No generic target records found

exposure_logsheet:

    linenum:       20.000
    targname:      A0620-00
    config:        HSP/UV2
    opmode:        ACQ
    num_exp:       1
    time_per_exp:  9M
    fluxnum_1:     1
    priority:      1
    param_1:       DATA-FORMAT=WORD,
    req_1:         CYCLE 2 / 20.0-21.0;
    req_2:         ONBOARD ACQ FOR 21.0;

!

    linenum:       21.000
    targname:      A0620-00
    config:        HSP/UV2
    opmode:        SINGLE
    aperture:      10.0
    sp_element:    F140LP
    num_exp:       3
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       SAMPLE-TIME=0.0001,
    param_2:       DATA-FORMAT=BYTE,
    req_1:         REPEAT 20.0-21.0 EVERY 30D +/- 7D
    req_2:         FOR 2 MORE TIMES;
    req_3:         NON-INT;
    req_4:         RT-ANALYSIS;
    comment_1:     PREFER TDRSS DOWNLINK RATHER
    comment_2:     THAN TAPE RECORDER.

!

    linenum:       30.000
    targname:      V404CYG
    config:        HSP/UV2
    opmode:        ACQ
    num_exp:       1
    time_per_exp:  200S
    fluxnum_1:     1
    priority:      1
    param_1:       DATA-FORMAT=WORD,
    req_1:         CYCLE 2 / 30.0-31.0;
    req_2:         ONBOARD ACQ FOR 31.0;

!

    linenum:       31.000
    targname:      V404CYG
    config:        HSP/UV2
    opmode:        SINGLE
    aperture:      10.0
    sp_element:    F140LP
    num_exp:       3
    time_per_exp:  20M
    fluxnum_1:     1
    priority:      1
    param_1:       SAMPLE-TIME=0.0001,
    param_2:       DATA-FORMAT=BYTE,
    req_1:         REPEAT 30.0-31.0 EVERY 30D +/- 7D
    req_2:         FOR 2 MORE TIMES;
    req_3:         NON-INT;
    req_4:         RT-ANALYSIS;
    comment_1:     PREFER TDRSS DOWNLINK RATHER
    comment_2:     THAN TAPE RECORDER.

!
! end of exposure logsheet

! No scan data records found