!  File:  1117C.PROP
!  Database:  PEPDB
!  Date:  16-FEB-1994:02:23:37

coverpage:

  title_1:         GLOBULAR CLUSTERS IN M31 AND NGC205 (WF/PC-13):
    title_2:       CYCLE 3 AND FUTURE-CYCLE CONTINUATION
    sci_cat:       STELLAR POPULATIONS
    proposal_for:  GTO/WFC
    pi_title:      PROF.
    pi_fname:      JAMES
    pi_mi:         A.
    pi_lname:      WESTPHAL
    pi_inst:       CALTECH
    pi_country:    USA
    keywords_1:    GLOBULAR CLUSTERS, LOCAL GROUP, POPULATION II, HR
    keywords_2:    DIAGRAMS, HALOS, STELLAR POPULATIONS, SPIRAL GALAXIES
    hours_pri:     8.30
    num_pri:       6
    pi_position:   PROFESSOR
! end of coverpage

abstract:

    line_1:        HR diagrams and radial density profiles will be studied for three globular
    line_2:        clusters in M31 and one in NGC205 using direct Wide Field Camera images in
    line_3:        filters F555W and F785LP. The clusters span a range in line strength from H
    line_4:        VIII and M IV (very metal-poor), through M II, to K58 (slightly sub-solar).
    line_5:        Problems to be studied include the luminosity fuction of stars on the cluster
    line_6:        giant branch, their spread in temperature, horizontal-branch morphology, and
    line_7:        the tidal radii of the clusters. Of special interest is the apparent magnitude
    line_8:        of the horizontal branch and its possible utility as a distance indicator. The
    line_9:        HR diagram of any background stellar population in the halo of M31 and the
    line_10:       general field of NGC205 will also be compiled, and the age and metallicity
    line_11:       distribution of the background population studied.

!
! end of abstract

general_form_proposers:

  lname:           WESTPHAL
    fname:         JAMES
    mi:            A.
    inst:          CALTECH
    country:       USA

!
! end of general_form_proposers block

general_form_text:

  question:        3
    section:       1
    line_1:        One-orbit, dark-time exposure in each of two filters, F555W and F785LP, are
    line_2:        planned on each cluster. A background field in M31 is also planned in order to
    line_3:        allow subtraction of the superposed M31 population on NGC205. Additional
    line_4:        shorter exposures are included for cosmic-ray subtraction.
    line_6:        Distribution of exposures with observing period:
    line_8:        1st Year - MII (exposure 5 ) (cycle 9)
    line_9:        2nd Year - K58,M IV, H VIII,NGC224 - (M31 background field) (exposures 6,8,9)
    line_10:       (cycle 9)

!

  question:        6
    section:       1
    line_1:        Limiting source of noise is readout noise; exposures must not be interrupted.
    line_3:        It is also desired that all exposures longer than 1000 sec be taken after the
    line_4:        telescope has passed beyond the brightly lit limb of the Earth (see note on
    line_5:        "dark time" on exposure logsheets). It is not requested that the telescope
    line_6:        actually be within the Earth's shadow. Dark time is needed to minimize diffuse
    line_7:        scattered light and maximize S/N on faint stars. The above guideline of 1000
    line_8:        sec may need modification after real experience in orbit.

!

  question:        13
    section:       1
    line_1:        HR diagrams are planned in filters F555W and F785LP for three globular star
    line_2:        clusters MII, MIV, and K58 in M31. These fields also contain the
    line_3:        background halo stellar population of M31. A fourth target containing the
    line_4:        globular cluster H VIII and the general field of NGC205 is also planned.
    line_5:        Analysis will include giant-branch luminosity functions, horizontal-branch
    line_6:        morphology, horizontal-branch magnitudes, and age and metallicity distributions
    line_7:        of stars in both clusters and field, as well as the radial density profiles of
    line_8:        the clusters.

!
!end of general form text

general_form_address:

  lname:           GUNN
    fname:         JAMES
    mi:            E.
    category:      CON
    inst:          PRINCETON UNIVERSITY
    addr_1:        ASTROPHYSICAL SCIENCE
    addr_2:        PEYTON HALL
    city:          PRINCETON
    state:         NJ
    zip:           08540
    country:       USA
    phone:         (609)452-3802

!

  lname:           BAUM
    fname:         WILLIAM
    category:      CON
    inst:          LOWELL OBSERVATORY
    addr_1:        PLANETARY RESEARCH CT.
    addr_2:        P.O. BOX 1269
    city:          FLAGSTAFF
    state:         AZ
    zip:           86002
    country:       USA
    phone:         (602)774-3358

!

  lname:           WESTPHAL
    fname:         JAMES
    mi:            A.
    title:         PROF.
    category:      PI
    inst:          CALTECH
    addr_1:        M/S 170-25
    addr_2:        DIVISION OF GEOLOGICAL
    addr_3:        & PLANETARY SCIENCES
    city:          PASADENA
    state:         CA
    zip:           91125
    country:       USA

!

  lname:           FABER
    fname:         SANDRA
    mi:            M.
    category:      CON
    inst:          UC SANTA CRUZ
    addr_1:        LICK OBSERVATORY
    addr_2:        NATURAL SCIENCE II, BLDG. 160
    city:          SANTA CRUZ
    state:         CA
    zip:           95064
    country:       USA
    phone:         (408)429-2944

!
! end of general_form_address records

fixed_targets:

    targnum:       1
    name_1:        K1
    name_2:        MII
    descr_1:       D, 201
    pos_1:         RA=00H30M05.2S +/-0.3S,
    pos_2:         DEC= +39D18'05" +/-5"
    equinox:       1950
    comment_1:     GLOBULAR CLUSTER IN M31
    fluxnum_1:     1
    fluxval_1:     V=25.0+/-0.5

!

    targnum:       2
    name_1:        K219
    name_2:        MIV
    descr_1:       D, 201
    pos_1:         RA=00H40M33.9S +/-0.3S,
    pos_2:         DEC= +39D32'46" +/-5"
    equinox:       1950
    comment_1:     GLOBULAR CLUSTER IN M31
    fluxnum_1:     1
    fluxval_1:     V=25.0+/-0.5

!

    targnum:       3
    name_1:        K58
    descr_1:       D, 201
    pos_1:         RA=00H37M42.9S+/-0.3S,
    pos_2:         DEC=+41D10'50"+/-5"
    equinox:       1950
    comment_1:     GLOBULAR CLUSTER IN M31
    fluxnum_1:     1
    fluxval_1:     V=25.0+/-0.5

!

    targnum:       4
    name_1:        HVIII
    descr_1:       D, 201
    pos_1:         RA=00H37M11.0S+/-0.3S,
    pos_2:         DEC=+41D31'14"+/-5"
    equinox:       1950
    comment_1:     GLOBULAR CLUSTER IN NGC 205
    fluxnum_1:     1
    fluxval_1:     V=25.0+/-0.5

!

    targnum:       5
    name_1:        NGC224-0038+4148
    descr_1:       D, 201, E, 301
    pos_1:         RA=00H38M22.2S+/-0.3S,
    pos_2:         DEC=+41D45'16"+/-5"
    equinox:       1950
    comment_1:     BACKGROUND COMPARISON FIELD
    comment_2:     FOR HVIII
    fluxnum_1:     1
    fluxval_1:     V=27.0+/-0.5

!

    targnum:       6
    name_1:        K351
    descr_1:       D, 201
    pos_1:         RA=00H46M54.6S+/-0.3S,
    pos_2:         DEC=+41D19'05"+/-5"
    equinox:       1950
    comment_1:     GLOBULAR CLUSTER IN M31
    fluxnum_1:     1
    fluxval_1:     V=27.0+/-0.5

!
! end of fixed targets

! No solar system records found

! No generic target records found

exposure_logsheet:

    linenum:       1.000
    sequence_1:    DEFINE
    sequence_2:    CLUS
    targname:      #
    config:        WFC
    opmode:        IMAGE
    aperture:      WF1
    sp_element:    F785LP
    num_exp:       #
    time_per_exp:  2200S
    fluxnum_1:     #
    priority:      #
    param_1:       CR-SPLIT=0.5,
    param_2:       PRE-FLASH=NO,
    param_3:       CR-TOLERANCE=0.0
    req_1:         SAME POS FOR 3 AS 1;
    req_2:         SAME ORIENT FOR 3 AS 1;
    req_3:         SEQ 1-3 WITHIN 1D;
    comment_1:     CYCLE 3-9 PROPOSAL VERSION
    comment_2:     3/25/92  11:42  TRL/RML.

!

    linenum:       3.000
    sequence_1:    ^
    targname:      #
    config:        WFC
    opmode:        IMAGE
    aperture:      WF1
    sp_element:    F555W
    num_exp:       #
    time_per_exp:  2500S
    fluxnum_1:     #
    priority:      #
    param_1:       CR-SPLIT=0.5,
    param_2:       PRE-FLASH=NO,
    param_3:       CR-TOLERANCE=0.0
    req_1:         NON-INT / 1-3
    comment_1:     LINES 1 AND 3 ARE EACH INTENDED TO
    comment_2:     FILL A COMPLETE ORBIT.
    comment_3:     EXPOSURE TIMES MAY REQUIRE A
    comment_4:     SMALL ADJUSTMENT TO ENSURE THIS.

!

    linenum:       5.000
    sequence_1:    USE
    sequence_2:    CLUS
    targname:      K1
    num_exp:       1
    time_per_exp:  X1
    fluxnum_1:     1
    priority:      2
    req_1:         CYCLE 3 / 5-10;

!

    linenum:       6.000
    sequence_1:    USE
    sequence_2:    CLUS
    targname:      K219
    num_exp:       1
    time_per_exp:  X1
    fluxnum_1:     1
    priority:      1

!

    linenum:       7.000
    sequence_1:    USE
    sequence_2:    CLUS
    targname:      K58
    num_exp:       1
    time_per_exp:  X1
    fluxnum_1:     1
    priority:      2

!

    linenum:       8.000
    sequence_1:    USE
    sequence_2:    CLUS
    targname:      HVIII
    num_exp:       1
    time_per_exp:  X1
    fluxnum_1:     1
    priority:      2

!

    linenum:       10.000
    sequence_1:    USE
    sequence_2:    CLUS
    targname:      K351
    num_exp:       1
    time_per_exp:  X1
    fluxnum_1:     1
    priority:      2

!

    linenum:       309.000
    sequence_1:    USE
    sequence_2:    CLUS
    targname:      NGC224-0038+4148
    num_exp:       1
    time_per_exp:  X1
    fluxnum_1:     1
    priority:      9
    req_1:         CYCLE 4;
    req_2:         COND IF TAC OK

!
! end of exposure logsheet

! No scan data records found