!  File:  4208C.PROP
!  Database:  PEPDB
!  Date:  20-FEB-1994:13:21:58

coverpage:

  title_1:         SEARCH FOR OORT COMET CLOUD UV EMISSION, SUITABLE NOVA
    title_2:       OF OPPORTUNITY -- EPOCH 2
    sci_cat:       INTERSTELLAR MEDIUM
    proposal_for:  GO/AM
    targ_of_opp:   X
    cont_id:       2797
    pi_title:      MR.
    pi_fname:      T.
    pi_mi:         J.
    pi_lname:      HEWITT
    pi_inst:       AMATEUR ASTRONOMERS WORKING GROUP
    pi_country:    USA
    pi_phone:      415-525-5096
    keywords_1:    COMET, NOVA, UV, EMISSION
    hours_pri:     10.58
    num_pri:       3
    wf_pc:         X
    pi_position:   MR.
! end of coverpage

abstract:

    line_1:        The aim of this proposal is to search for evidence of an Oort Cloud of
    line_2:        comets surrounding the system of a bright galactic nova (target of
    line_3:        opportunity), using the nova's light pulse as a "probe." Oort Cloud objects
    line_4:        are believed to be rich in frozen volatiles (chiefly water) and organic
    line_5:        molecules. The energetic flux of a bright nova may trigger significant
    line_6:        activity from a large fraction of an Oort Cloud's population. The HST's unique
    line_7:        ability to obtain high-resolution filtered images in the ultraviolet is
    line_8:        critical to this proposal, since the OH (3085 A and 2820 A bands)
    line_9:        products of water evaporation and dissociation processes in a remote
    line_10:       Oort Cloud are potentially observable using the Wide Field
    line_11:       Camera. Detection of an Oort Cloud would be a substantial result. Images
    line_12:       obtained at two epochs (70 and 180 days from maximum luminosity) will be used to
    line_13:       search for evidence of an Oort Cloud and may reveal information about the
    line_14:       composition, total mass, and spatial distribution of material in the cloud.

!
! end of abstract

general_form_proposers:

  lname:           HEWITT
    fname:         T.
    title:         MR.
    mi:            J.
    inst:          AMATEUR ASTRONOMERS WORKING GROUP
    country:       USA

!
! end of general_form_proposers block

general_form_text:

  question:        3
    section:       1
    line_1:        Approximately 70 days after the nova's maximum luminosity, an Epoch 1
    line_2:        image (Exposure 1) was obtained.
    line_4:        In this proposal, we will revisit the nova region.
    line_6:        All exposures will be made with filter F284W, to take advantage of the OH
    line_7:        bands at 3085 A and 2820 A. The observations have been split into three
    line_8:        groups of exposures:
    line_10:       Group 1 is 2 short exposures. These should be short enough to ensure that
    line_11:       the nova will not saturate
    line_12:       the chip but long enough to get the best signal to noise possible.
    line_14:       Group 2 are a couple of medium length exposures. These will show more
    line_15:       detail of the surrounding region
    line_16:       however the nova will saturate and possibly bleed across the chip.
    line_18:       Group 3 are a series of long exposures. Here we hope to pull out the more
    line_19:       faint details in the background
    line_20:       but we expect the nova to be highly saturated.

!

  question:        5
    section:       1
    line_1:        Exposure times are our best estimate.

!

  question:        6
    section:       1
    line_1:        This Observation should be scheduled at roughly 180 days of nova's peak
    line_2:        brillancy
    line_3:        for comparison with emission features detected in epoch 1.

!

  question:        7
    section:       1
    line_1:        Data reduction and analysis will make use of the facilities offered by STScI
    line_2:        and available at UC, Berekeley.

!
!end of general form text

general_form_address:

  lname:           HEWITT
    fname:         T.
    mi:            J.
    category:      PI
    inst:          AMATEUR ASTRONOMERS WORKING GROUP
    addr_1:        418 BOYNTON AVE.
    city:          BERKELEY
    state:         CA
    zip:           94707
    country:       USA
    phone:         (415) 525-5096
    from_date:     10-OCT-89
    to_date:       10-OCT-99

!
! end of general_form_address records

fixed_targets:

    targnum:       1
    name_1:        NOVA-CYGNI-1992
    descr_1:       A,150, G,512
    pos_1:         RA = 20H 30M 31.626S +/- 1",
    pos_2:         DEC = 52D 37' 51.88" +/- 1",
    pos_3:         PLATE-ID=003I
    equinox:       J2000
    pm_or_par:     NO
    comment_1:     V=17 IS OF PROGENITOR STAR.
    comment_2:     ANTICIPATE NOVA TO BE AT U=9 OR
    comment_3:     FAINTER AT TIME OF OBSERVATION.
    fluxnum_1:     1
    fluxval_1:     V=17

!
! end of fixed targets

! No solar system records found

! No generic target records found

exposure_logsheet:

    linenum:       1.000
    targname:      NOVA-CYGNI-1992
    config:        PC
    opmode:        IMAGE
    aperture:      PC6
    sp_element:    F284W
    num_exp:       1
    time_per_exp:  3.0S
    s_to_n:        10
    priority:      1
    param_2:       PRE-FLASH=YES,
    param_3:       CR-SPLIT=0.33
    req_1:         CYCLE 1/1-3;
    req_2:         AT 3-SEP-92 +/- 10D;
    req_3:         SEQ 1-3 NO GAP;
    req_4:         ORIENT 173D +/- 2D

!

    linenum:       1.500
    targname:      NOVA-CYGNI-1992
    config:        PC
    opmode:        IMAGE
    aperture:      PC6
    sp_element:    F284W
    num_exp:       1
    time_per_exp:  30S
    s_to_n:        10
    priority:      1
    param_2:       PRE-FLASH=YES,
    param_3:       CR-SPLIT=0.33
    req_1:         SAME ORIENT FOR 1.5-3 AS 1.0

!

    linenum:       2.000
    targname:      NOVA-CYGNI-1992
    config:        PC
    opmode:        IMAGE
    aperture:      PC6
    sp_element:    F284W
    num_exp:       2
    time_per_exp:  1200S
    s_to_n:        10
    priority:      1
    param_2:       PRE-FLASH=YES,
    param_3:       CR-SPLIT=0.25

!

    linenum:       3.000
    targname:      NOVA-CYGNI-1992
    config:        PC
    opmode:        IMAGE
    aperture:      PC6
    sp_element:    F284W
    num_exp:       2
    time_per_exp:  1200S
    s_to_n:        10
    priority:      1
    param_2:       PRE-FLASH=YES,
    param_3:       CR-SPLIT=0.25
    req_1:         POS TARG 0.7,0.0;
    comment_1:     POS TARG IS IN DIRECTION OF BLOOMING
    comment_2:     AND FROM THE NOMINAL PC6 APERTURE
    comment_3:     LOCATION;

!
! end of exposure logsheet

! No scan data records found