!   $Id: 5356,v 7.1 1994/07/27 17:01:37 pepsa Exp $

coverpage:

  title_1:         QUANTITATIVE EXPLORATION OF PROTO-PLANETARY DISKS:
    title_2:       GHRS OBSERVATIONS OF BETA PIC -- CYCLE 4 HIGH
    sci_cat:       INTERSTELLAR MEDIUM
    sci_subcat:    CIRCUMSTELLAR MATTER
    proposal_for:  GO
    pi_fname:      SARA
    pi_mi:         R
    pi_lname:      HEAP
    pi_inst:       NASA/GSFC
    pi_country:    U.S.A.
    pi_phone:      301-286-5359
    hours_pri:     6.80
    num_pri:       1
    hrs:           Y
    off_fname:     STEPHEN
    off_lname:     HOLT
    off_title:     DIR., SPACE SCI.
    off_inst:      GODDARD SPACE FLIGHT CENTER
    off_addr_1:    CODE 600, GSFC
    off_city:      GREENBELT
    off_state:     MD
    off_zip:       20771
    off_country:   U.S.A.
    off_phone:     301-286-6066
! end of coverpage

abstract:

    line_1:        HST will provide the first opportunity
    line_2:        to make a detailed, quantitative study of the proto-planetary
    line_3:        disk around the nearby A3V star, Beta Pic. WFPC2 and FOC/COSTAR
    line_4:        are expected to obtain high-resolution pictures of this system.
    line_5:        Even with HST, however, there are severe observational challenges
    line_6:        calling for a detector with an enormous dynamic range. In addition,
    line_7:        the detector must have a high UV sensitivity and zero red-light leak
    line_8:        in order to determine the composition of the dust disk from UV
    line_9:        reflectance spectra. In order to meet
    line_10:       these daunting observational requirements, we propose
    line_11:       an innovative observing technique involving the GHRS. Only the
    line_12:       GHRS has the following combination of features which are essential
    line_13:       for exploring circumstellar disks: opportunity for narrow-band
    line_14:       UV photometry, a huge dynamic range, excellent photometric
    line_15:       characteristics, and the capability of imaging spectroscopy.
    line_16:       We will capitalize on these benefits to probe the central cavity
    line_17:       of the disk, estimate the grain size and composition of the dust,
    line_18:       map the circumstllar gas, and search for evidence of planet-sized
    line_19:       bodies.

!
! end of abstract

general_form_proposers:

  lname:           HEAP
    fname:         SARA
    mi:            R
    inst:          2856
    country:       U.S.A.

!

  lname:           HUBENY
    fname:         IVAN
    inst:          3650
    country:       U.S.A.

!

  lname:           LANZ
    fname:         THIERRY
    inst:          3650
    country:       U.S.A.

!

  lname:           LINDLER
    fname:         DON
    inst:          ADVANCED COMPUTER CONCEPTS, POTOMAC MD
    country:       U.S.A.

!
! end of general_form_proposers block

general_form_text:

  question:        3
    section:       1
    line_1:        LINES 1-9 acquire the star, Beta Pic, with A2 and get an A2 image of
    line_2:        the central 1.72" region
    line_3:        LINES 10-19 get sample LSA spectra ut derive F(LSA)/F(SSA)=f(wavelength)
    line_4:        and attempts to detect SiIII 1206 emission from the central disk
    line_5:        LINES 20-29 get SSA spectra of the star over wavelength interval,
    line_6:        1530-3100 A. Together they provide the baseline against which disk
    line_7:        abs, em, scattering is detected.
    line_8:        LINES 30-39 get SSA spectra of the disk at r~2" from star ut
    line_9:        derive albedo=f(wavelength) & look for absorption by gas
    line_10:       LINES 50-69 get SSA spectra of the disk at other distances from
    line_11:       the star (r=1", r=3").
    line_12:       LINES 100-105 get a 3x1 mosaic of the beta Pic disk in N2, in order
    line_13:       to map the presumed dust cavity

!

  question:        4
    section:       1
    line_1:        HST is needed for its high spatial resolution, access to UV.
    line_2:        GHRS is needed for its UV sensitivity, no grating scatter,
    line_3:        extremely high dynamic range.

!

  question:        5
    section:       1
    line_1:        The A2 and N2 mirrors incorporate geocoronal lyman alpha. To
    line_2:        avoid the geocoronal emission, you need to take the A2 and N2 images
    line_3:        in the DARK.
    line_4:        It is necessary to get these data by August 1994 so that they
    line_5:        can be described at an international meeting, "Disks and Outflows
    line_6:        from Young Stars" on 6-9 Sep 1994 in Heidelberg, Germany.

!

  question:        6
    section:       1
    line_1:        The surface brightness of the disk of beta Pic will be measured
    line_2:        differentially, i.e. from the observed image - the image of a point
    line_3:        source. It is therefore necessary to have HIGHLY ACCURATE PSF's in
    line_4:        the A2 and N2 mirror modes.

!


!

  question:        8
    section:       1
    line_1:

!

  question:        9
    section:       1
    line_1:

!

  question:        10
    section:       1
    line_1:        Financial: salary of the PI=Heap, and CoI=Hubeny
    line_2:        Computing: institutional computers for data analysis, modelling
    line_3:        Scientific: consultation by Planetary Systems branch

!
!end of general form text

general_form_address:

  lname:           HEAP
    fname:         SARA
    mi:            R
    category:      PI
    inst:          NASA/GSFC
    addr_1:        CODE 681,GSFC
    city:          GREENBELT
    state:         MD
    zip:           20771
    country:       U.S.A.
    phone:         301-286-9545
    telex:         HRSHEAP@STARS.GSFC.NASA.GOV

!
! end of general_form_address records

fixed_targets:

    targnum:       1
    name_1:        BETA-PIC-DISK1
    descr_1:       A,123,904
    pos_1:         R = 1",
    pos_2:         PA=30D,
    pos_3:         FROM 10
    comment_1:     DISK CAVITY AT R=1"
    fluxnum_1:     1
    fluxval_1:     SURF(V)=11.8

!

    targnum:       2
    name_1:        BETA-PIC-DISK2
    descr_1:       A,123,904
    pos_1:         R = 2",
    pos_2:         PA=30D,
    pos_3:         FROM 10
    comment_1:     NE SECTION OF DISK
    fluxnum_1:     1
    fluxval_1:     SURF(V)=11.8

!

    targnum:       3
    name_1:        BETA-PIC-DISK3
    descr_1:       A,123,904
    pos_1:         R = 3",
    pos_2:         PA=30D,
    pos_3:         FROM 10
    fluxnum_1:     1
    fluxval_1:     SURF(V)=13.4

!

    targnum:       4
    name_1:        BETA-PIC-DISK4
    descr_1:       A,123,904
    pos_1:         R = 4",
    pos_2:         PA=30D,
    pos_3:         FROM 10
    fluxnum_1:     1
    fluxval_1:     SURF(V)=14.5

!

    targnum:       10
    name_1:        HD39060
    name_2:        BETA-PIC,BS2020
    descr_1:       A,123,904
    pos_1:         RA=5H 47M 17.1S +/- 0.5S,
    pos_2:         DEC=-51D 03' 59" +/- 0.5"
    equinox:       2000
    pm_or_par:     Y
    pos_epoch_yr:  2000.00
    pos_epoch_bj:  J
    ra_pm_val:     0.000600
    ra_pm_unct:    0.000100
    dec_pm_val:    0.0870
    dec_pm_unct:   0.0001
    an_prlx_val:   0.0610
    an_prlx_unct:  0.0010
    comment_1:     YALE BS GIVES MU(RA)=5.0E-3 "/YR,
    comment_2:     MU(DEC)=8.7E-2 "/YR;
    comment_3:     RA_PM_VAL GIVEN IN SEC/YR
    fluxnum_1:     1
    fluxval_1:     V=3.85 +/-0.1
    fluxnum_2:     2
    fluxval_2:     B-V=+0.17

!
! end of fixed targets

! No solar system records found

! No generic target records found

exposure_logsheet:

    linenum:       1.000
    targname:      HD39060
    config:        HRS
    opmode:        ACQ
    aperture:      2.0
    sp_element:    MIRROR-A2
    time_per_exp:  1.8S
    priority:      1
    param_1:       SEARCH-SIZE=3,
    param_2:       BRIGHT=RETURN,
    param_3:       LOCATE=YES
    req_1:         CYCLE 4;
    req_2:         ONBOARD ACQ FOR 2-105;
    comment_1:     TEXP=(128*NMAP+S-S^2)*TSTEP=
    comment_2:     (0+3*3)*.2=1.8S

!

    linenum:       2.000
    targname:      HD39060
    config:        HRS
    opmode:        IMAGE
    aperture:      2.0
    sp_element:    MIRROR-A2
    num_exp:       1
    time_per_exp:  128S
    priority:      1
    param_1:       NX=16,NY=16,
    param_2:       DELTA-X=4,DELTA-Y=4
    req_1:         CYCLE 4; DARK TIME
    comment_1:     TEXP=NX*NY*TDWELL=256*.5

!

    linenum:       10.000
    targname:      HD39060
    config:        HRS
    opmode:        ACCUM
    aperture:      2.0
    sp_element:    G160M
    wavelength:    1206
    num_exp:       1
    time_per_exp:  10M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;
    comment_1:     ** ANY SIGN OF DISK SI III EM? **

!

    linenum:       11.000
    targname:      HD39060
    config:        HRS
    opmode:        ACCUM
    aperture:      2.0
    sp_element:    G160M
    wavelength:    1560
    num_exp:       1
    time_per_exp:  5M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       13.000
    targname:      HD39060
    config:        HRS
    opmode:        ACCUM
    aperture:      2.0
    sp_element:    G200M
    wavelength:    1860
    num_exp:       1
    time_per_exp:  3.3M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       16.000
    targname:      HD39060
    config:        HRS
    opmode:        ACCUM
    aperture:      2.0
    sp_element:    G270M
    wavelength:    2600
    num_exp:       1
    time_per_exp:  2M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       21.000
    targname:      HD39060
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G160M
    wavelength:    1560
    num_exp:       1
    time_per_exp:  5M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;
    comment_1:     ** CIV 1550 (IF PRESENT), CI 1561 **

!

    linenum:       22.000
    targname:      HD39060
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G160M
    wavelength:    1665
    num_exp:       1
    time_per_exp:  5M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;
    comment_1:     ** CI 1657, AL II 1670 **

!

    linenum:       23.000
    targname:      HD39060
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G200M
    wavelength:    1860
    num_exp:       1
    time_per_exp:  3.3M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;
    comment_1:     ** AL III 1855,1863 **

!

    linenum:       24.000
    targname:      HD39060
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G200M
    wavelength:    1940
    num_exp:       1
    time_per_exp:  3.3M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;
    comment_1:     ** CI 1930 **

!

    linenum:       25.000
    targname:      HD39060
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G270M
    wavelength:    2325
    num_exp:       1
    time_per_exp:  2.0M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;
    comment_1:     ** CII] 2325 **

!

    linenum:       26.000
    targname:      HD39060
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G270M
    wavelength:    2600
    num_exp:       1
    time_per_exp:  2M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;
    comment_1:     ** FE II MULTIPLET **

!

    linenum:       27.000
    targname:      HD39060
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G270M
    wavelength:    2800
    num_exp:       1
    time_per_exp:  2M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;
    comment_1:     ** MG II 2800; CAN'T
    comment_2:     REACH MG I 2850 **

!

    linenum:       29.000
    targname:      HD39060
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G270M
    wavelength:    3090
    num_exp:       1
    time_per_exp:  2M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;
    comment_1:     ** COMETARY OH AT 3090 **

!

    linenum:       30.000
    targname:      BETA-PIC-DISK2
    config:        HRS
    opmode:        ACCUM
    aperture:      2.0
    sp_element:    G160M
    wavelength:    1206
    num_exp:       1
    time_per_exp:  15M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       31.000
    targname:      BETA-PIC-DISK2
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G160M
    wavelength:    1560
    num_exp:       1
    time_per_exp:  15M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       32.000
    targname:      BETA-PIC-DISK2
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G160M
    wavelength:    1665
    num_exp:       1
    time_per_exp:  15M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       33.000
    targname:      BETA-PIC-DISK2
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G200M
    wavelength:    1860
    num_exp:       1
    time_per_exp:  6.6M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       34.000
    targname:      BETA-PIC-DISK2
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G200M
    wavelength:    1940
    num_exp:       1
    time_per_exp:  6.6M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       35.000
    targname:      BETA-PIC-DISK2
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G270M
    wavelength:    2325
    num_exp:       1
    time_per_exp:  4.0M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       36.000
    targname:      BETA-PIC-DISK2
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G270M
    wavelength:    2600
    num_exp:       1
    time_per_exp:  4M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       37.000
    targname:      BETA-PIC-DISK2
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G270M
    wavelength:    2800
    num_exp:       1
    time_per_exp:  4M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       38.000
    targname:      BETA-PIC-DISK2
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G270M
    wavelength:    2850
    num_exp:       1
    time_per_exp:  4M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       39.000
    targname:      BETA-PIC-DISK2
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G270M
    wavelength:    3090
    num_exp:       1
    time_per_exp:  10M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       50.000
    targname:      BETA-PIC-DISK1
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G200M
    wavelength:    1860
    num_exp:       1
    time_per_exp:  7M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       52.000
    targname:      BETA-PIC-DISK1
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G270M
    wavelength:    2600
    num_exp:       1
    time_per_exp:  4.0M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       60.000
    targname:      BETA-PIC-DISK3
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G200M
    wavelength:    1860
    num_exp:       1
    time_per_exp:  20M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       62.000
    targname:      BETA-PIC-DISK3
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G270M
    wavelength:    2600
    num_exp:       1
    time_per_exp:  10.0M
    priority:      1
    param_1:       STEP-PATT=3
    req_1:         CYCLE 4;

!

    linenum:       100.000
    targname:      HD39060
    config:        HRS
    opmode:        IMAGE
    aperture:      2.0
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  51.2S
    priority:      1
    param_1:       NX=16,NY=16,
    param_2:       DELTA-X=4,DELTA-Y=4
    req_1:         CYCLE 4; DARK TIME
    comment_1:     TDWELL=0.2S

!

    linenum:       101.000
    targname:      HD39060
    config:        HRS
    opmode:        IMAGE
    aperture:      2.0
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  768S
    priority:      1
    param_1:       NX=32,NY=16,
    param_2:       DELTA-X=2,DELTA-Y=4
    req_1:         CYCLE 4; DARK TIME;
    req_2:         POS TARG  +1.0,0.0
    comment_1:     SLIT EDGE JUST MISSES STAR
    comment_2:     AT X=+1.0"; TDWELL=1.5 S

!

    linenum:       105.000
    targname:      HD39060
    config:        HRS
    opmode:        IMAGE
    aperture:      2.0
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  768S
    priority:      1
    param_1:       NX=32,NY=16,
    param_2:       DELTA-X=2,DELTA-Y=4
    req_1:         CYCLE 4; DARK TIME;
    req_2:         POS TARG  -1.0,0.0
    comment_1:     SLIT EDGE JUST MISSES STAR
    comment_2:     AT X=-1.0"; TDWELL=1.5 S

!
! end of exposure logsheet

! No scan data records found