!   $Id: 5378,v 11.1 1994/07/27 17:17:37 pepsa Exp $

coverpage:

  title_1:         MORPHOLOGICAL EVOLUTION OF GALAXIES IN CLUSTERS
    title_2:       AT Z = 0.5
    sci_cat:       GALAXIES & CLUSTERS
    sci_subcat:    DISTANT GALAXIES
    proposal_for:  GO
    pi_fname:      ALAN
    pi_lname:      DRESSLER
    pi_inst:       3030
    pi_country:    USA
    pi_phone:      818-304-0245
    hours_pri:     41.42
    num_pri:       8
    wf_pc:         Y
    off_fname:     JOHN
    off_lname:     LIVELY
    off_title:     DIR ADMIN AND FIN
    off_inst:      3030
    off_addr_1:    1530 P. ST., N.W.
    off_city:      WASHINGTON
    off_state:     DC
    off_zip:       20005
    off_country:   USA
    off_phone:     202-387-6400
! end of coverpage

abstract:

    line_1:        Our program is intended to study galaxy evolution through the investigation
    line_2:        of galaxy morphology and spectrophotometry as a function of lookback time.
    line_3:        Cycle 1 and 2 observations made by two teams represented in this proposal
    line_4:        have demonstrated HST's unique potential for providing detailed morphological
    line_5:        information for galaxies in clusters at z = 0.5.  Such data are applicable
    line_6:        to basic questions such as the development of disks and bulges, and the role
    line_7:        mergers and interactions, and other environmental influences on the evolution
    line_8:        of structure and stellar populations.
    line_10:       Both teams made Cycle 1 and 2 observations that are described here.  However,
    line_11:       the combination of the SA problem and reduced time allocations severely
    line_12:       limited the scope of both programs; thus, we request consideration under the
    line_13:       Precedents Policy for originally approved Cycle 1 programs.
    line_15:       We use our earlier results to demonstrate the feasibility of our program,
    line_16:       pointing out the interesting but ambiguous nature of what has been learned
    line_17:       to this point.  In order to better understand the processes at work and
    line_18:       and their range, we propose a more extensive program which includes a wider
    line_19:       representation of cluster environments, adds color information, and reaches
    line_20:       to higher redshifts.

!
! end of abstract

general_form_proposers:

  lname:           DRESSLER
    fname:         ALAN
    inst:          3030
    country:       USA

!

  lname:           BUTCHER
    fname:         HARVEY
    inst:          6880
    country:       NETHERLANDS
    esa:           Y

!

  lname:           COUCH
    fname:         WARRICK
    inst:          4145
    country:       AUSTRALIA

!

  lname:           ELLIS
    fname:         RICHARD
    inst:          8014
    country:       UK
    esa:           Y

!

  lname:           OEMLER
    fname:         AUGUSTUS, JR.
    inst:          3900
    country:       USA

!

  lname:           SHARPLES
    fname:         RAY
    inst:          8018
    country:       UK
    esa:           Y

!
! end of general_form_proposers block

general_form_text:

  question:        3
    section:       1
    line_1:        We will observe 8 fields in rich clusters of galaxies covering the
    line_2:        redshift range 0.37 < z < 0.55.  These fields contain a range of
    line_3:        environments and properties.  We will image these fields with
    line_4:        WFC-2 multiple-orbit exposures that will later be coadded to
    line_5:        achieve sufficient signal-to-noise ratio for morphological
    line_6:        classification.  Field centers and boundaries are chosen with
    line_7:        to ground-based spectroscopic and photometric studies of galaxies
    line_8:        over the entire field.
    line_9:        HST-WFC-2 observations will be 4-7 coadded single-orbit exposures of
    line_10:       of 2000-2200 s, in a broad-band color roughly corresponding
    line_11:       to rest-frame V, and, for some fields, additional exposures in a
    line_12:       band corresponding to rest-frame U.  The range in exposure time will
    line_13:       (partially) compensate for the degradation in signal-to-noise ratio
    line_14:       due to increasing redshift.  Color maps will be constructed to study
    line_15:       the distribution of star formation.  Morphological classifications
    line_16:       will be done primarily from the rest-frame V images (this corresponds
    line_17:       closely with the traditional bandpass used for low-redshift galaxy
    line_18:       classifications) but we will attempt adding both bands to see if the
    line_19:       increased signal-to-noise and bluer color aids in the determination of
    line_20:       galaxy type.

!

  question:        3
    section:       2
    line_1:        According to the convention for WFPC-2, coordinates as given in the
    line_2:        FIXED TARGETS positions are shifted by POS TARG +10,+10 to bring the
    line_3:        center to the apex of the pyramid.  Exposures for a given field and
    line_4:        a given color are split into two groups with a shift introduced of
    line_5:        +2,+2 arcseconds, in order to displace objects situated on CCD defects
    line_6:        or on the seams of the pyramid.  Thus, POS TARG +12,+12 corresponds to
    line_7:        the second group.  CR-SPLIT=NO for all observations with more than
    line_8:        5 orbits, since in those cases there are sufficient multiple exposures
    line_9:        to perform cosmic ray rejection.
    line_11:       Orient angles are generally not critical, but some attempt has been
    line_12:       made to maximize the number of "active" galaxies covered by the WFPC-2
    line_13:       field, and to take some advantage of the PC chip, and to minimize the
    line_14:       disadvantage of its smaller field.  The most important factor is
    line_15:       to keep the ORIENT ANGLE the *SAME* for all observations of a target,
    line_16:       so that the same objects are sampled in all exposures and to simplify
    line_17:       coadding of the images.

!

  question:        4
    section:       1
    line_1:        Typical morphological classifications for galaxies at low redshift have
    line_2:        better than 1 kiloparsec resolution.  In his study of 55 rich cluster,
    line_3:        Dressler (1980 ApJS 42) was able to achieve reliable classifications for
    line_4:        approximately 6000 galaxies in rich clusters, out to a redshift of z = 0.05,
    line_5:        at which point the resolution with 1.0 arcsecond seeing was slightly better
    line_6:        than a kiloparsec. The best ground-based imaging for faint objects,
    line_7:        R > 19, has achieved 0.4 arcseconds FWHM with image stabilization, but
    line_8:        this amounts to approximately 3 kpc at z = 0.5, too crude for reliable
    line_9:        classification.  The HST is the only instrument that can provide
    line_10:       the ~= 0.1 arcsecond FWHM imaging that can achieve sub-kiloparsec
    line_11:       resolution for galaxies at z = 0.5 to allow comparable morphological
    line_12:       classifications to low-redshift galaxies.  The Wide-Field Camera, by
    line_13:       virtue of its comparatively large field, makes feasible a study of
    line_14:       clusters of galaxies which contain many galaxies, allowing statistical
    line_15:       samples to be assembled.

!

  question:        4
    section:       2
    line_1:        The time requested reflects the need for a substantial number of fields
    line_2:        (8) and the need for long exposures to achieve sufficient signal-to-
    line_3:        noise ratios for morphological classification.  The case for 8 different
    line_4:        fields is justified by the need to sample a range of cluster types and
    line_5:        environments, as explained in Section 2.
    line_7:        Exposures of between 140 to 245 minutes are necessary to accumulate
    line_8:        sufficient signal-to-noise ratios for accurate morphological
    line_9:        classification of galaxies in clusters at 0.35 < z < 0.55.  These
    line_10:       correspond to 4-7 orbit (typically 2100 s per orbit) exposures, depending on
    line_11:       the redshift.    The range of 4 to 7 orbits
    line_12:       reflects an attempt to partially compensate for the decrease in
    line_13:       signal-to-noise ratio with increasing redshift, again based on
    line_14:       simulations. In summary, then, the Cycle 1 and 2 observations confirmed
    line_15:       our original estimates of 4-6 orbit exposures for WFC-1, slightly
    line_16:       augmented to account for the loss of efficiency in WFC-2.
    line_17:       The above calculations refer to our F702W and F814W exposures.  We are
    line_18:       also imaging some of the cluster fields in F555W as well, to acquire color
    line_19:       information.  Because of the lower efficiency in F555W and the generally
    line_20:       lower fluxes in the ultraviolet for cluster galaxies, we expect that
    line_21:       these exposures will go much less deep in an equivalent time.

!

  question:        5
    section:       1
    line_1:        To allow for timely data reduction & analysis, we request the following:  
    line_2:        Do all exposures PER TARGET in this program within 7 days. ( This limit
    line_3:        may be relaxed if necessary so long as the essential goal of having all
    line_4:        exposures of the science target, made at the SAME ORIENT, is met, and
    line_5:        that the preferable ORIENT angle is used. We chose these angles pretty
    line_6:        carefully to minimize the effect of the smaller PC FOV.) The maintenance
    line_7:        of the same ORIENT is important for field coverage and frame coadding.
    line_8:        Exposures of 2000-2200 s are made in two groups, one or, in some cases,
    line_9:        two colors.  For the first group the Fixed Target List coordinates are
    line_10:       placed at the apex of the WFPC-2 pyramid by POS TARG +10,+10. For
    line_11:       a second group POS TARG +12,+12 moves all objects +2,+2 arcseconds,
    line_12:       so that objects are displaced from CCD defects and objects formerly on
    line_13:       the seams of the pyramid are revealed.
    line_14:
    line_15:       CR-SPLIT=NO is used when six or more orbits are taken, since this
    line_16:       provides sufficient frames for cosmic ray rejection, but CR-SPLIT=0.5
    line_17:       is used when 5 or fewer frames are taken, along with CR-TOLERANCE=0.0
    line_18:       in order to keep the exposure times split evenly to facilitate the
    line_19:       removal of cosmic rays, etc.
    line_20:       
    line_21:       Please contact the PI as soon as possible if any of the links in this 
    line_22:       program have been or are to be broken for purposes of implementation 
    line_23:       and/or scheduling, in case he has any alternative preferences, etc.

!

  question:        6
    section:       1
    line_1:

!


!

  question:        8
    section:       1
    line_1:

!

  question:        9
    section:       1
    line_1:        No. 2373/3857/4719 "Morphology of Galaxies in Clusters at z = 0.5"
    line_2:        Cycles 1 and 2; GO; Dressler, Butcher, Gunn, and Oemler
    line_3:        No. 2600 "Cores of Early-Type Galaxies"
    line_4:        Cycles 1 and 2; GO; Faber, Kormendy, Richstone, Tremaine, Lauer, and Dressler
    line_5:        No. 2269 "Galaxy Populations in Intermediate Redshift Clusters
    line_6:        Cycle 1; GO; Couch, Ellis, and Sharples
    line_7:        No. 4072 "Star Formation Rates in Distant Cluster Galaxies"
    line_8:        Cycle 2; GTO; Ellis, Couch, Sharples, and MacCay
    line_9:        No. 4298 "Galaxy Populations in Intermediate Redshift Clusters"
    line_10:       Cycle 3; GO; Couch, Ellis, Sharples, and Smail

!

  question:        9
    section:       2
    line_1:        Observations from 2373/3857/4719 and N2269 are the only relevant
    line_2:        proposals with data (no data for 4072 and 4298 as of this writing).
    line_3:        The results of these two programs are covered in Section 2 of this proposal.
    line_4:        ``The Spectra and Morphology of Galaxies in High-Redshift Clusters'',
    line_5:        Dressler, A., in ``Observational Cosmology'', eds. G. Chincarini et al.,
    line_6:        ASP Conference Series, in press.
    line_7:        ``A Cluster of Nascent Galaxies at z=2?'', Dressler, A, Oemler, A. Jr.,
    line_8:        Gunn, J. E., and Butcher, H., ApJ, 404, L45, 1993
    line_9:        ``Deep WFPC Imaging of the z=0.3 cluster AC114''
    line_10:       Sharples, R.M., Smail, I., Ellis, R.S., Couch, W.J., Fitchett, M.
    line_11:       and Jorgensen, H. E. in ``Science with the Hubble Space Telescope'',
    line_12:       eds. Benvenuti, P. \& Schreier, E., ESO Conference and Workshop
    line_13:       Proceedings 44, 119-126 (1993).
    line_14:       ``Morphological Studies of the Galaxy Populations in Distant
    line_15:       Butcher-Oemler Clusters with HST''
    line_16:       Couch, W.J., Ellis, R.S., Sharples, R.M. and Smail, I. in
    line_17:       ``Observational Cosmology'', eds. Chincarini, G. et al., ASP
    line_18:       Conference Series, in press.

!

  question:        10
    section:       1
    line_1:        Extensive data-analysis capabilities, including systems and software
    line_2:        support, are provided by each of the five institutions represented here,
    line_3:        with good networking capabilities between these systems.
    line_4:        Partial support for students will be provided by Yale, Cambridge, Durham,
    line_5:        and New South Wales, where appropriate.

!
!end of general form text

general_form_address:

  lname:           DRESSLER
    fname:         ALAN
    category:      PI
    inst:          3030
    addr_1:        THE OBSERVATORIES OF CIW
    addr_2:        813 SANTA BARBARA ST.
    city:          PASADENA
    state:         CA
    zip:           91101
    country:       USA
    phone:         818-304-0245
    telex:         DRESSLER@OCIW.CALTECH.EDU

!
! end of general_form_address records

fixed_targets:

    targnum:       1
    name_1:        GAL-CLUS-001558+1609
    name_2:        CL0016+16
    descr_1:       F,404,406
    pos_1:         RA = 00H 15M 58.4S +/- 0.1S,
    pos_2:         DEC = +16D 9' 7.0" +/- 1.0"
    equinox:       1950.0
    comment_1:     THE FIELD CONTAINS MANY FAINT
    comment_2:     GALAXIES IN THE RANGE
    comment_3:     21 < V < 25.
    fluxnum_1:     1
    fluxval_1:     SURF(V) = 23.0 +/- 1.0

!

    targnum:       2
    name_1:        GAL-CLUS-005431-2756
    name_2:        J1888.16CL
    descr_1:       F,404,406
    pos_1:         RA = 00H 54M 29.3S +/- 0.1S,
    pos_2:         DEC = -27D 56' 44.0" +/- 1.0"
    equinox:       1950.0
    comment_1:     THE FIELD CONTAINS MANY FAINT
    comment_2:     GALAXIES IN THE RANGE
    comment_3:     21 < V < 25.
    fluxnum_1:     1
    fluxval_1:     SURF(V) = 23.0 +/- 1.0

!

    targnum:       3
    name_1:        GAL-CLUS-160134+4254
    name_2:        HOG CLUSTER 16H-BETA-BETA
    descr_1:       F,404,406
    pos_1:         RA = 16H 01M 30.7S +/- 0.1S,
    pos_2:         DEC = +42D 53' 47.0" +/- 1.0"
    equinox:       1950.0
    comment_1:     THE FIELD CONTAINS MANY FAINT
    comment_2:     GALAXIES IN THE RANGE
    comment_3:     21 < V < 25.
    fluxnum_1:     1
    fluxval_1:     SURF(V) = 23.0 +/- 1.0

!

    targnum:       4
    name_1:        GAL-CLUS-041234-6558
    name_2:        F1557-19TC
    descr_1:       F,404,406
    pos_1:         RA = 04H 12M 31.2S +/- 0.1S,
    pos_2:         DEC = -65D 57' 49.9" +/- 1.0"
    equinox:       1950.0
    comment_1:     THE FIELD CONTAINS MANY FAINT
    comment_2:     GALAXIES IN THE RANGE
    comment_3:     21 < V < 25.
    fluxnum_1:     1
    fluxval_1:     SURF(V) = 23.0 +/- 1.0

!

    targnum:       5
    name_1:        GAL-CLUS-140933+5226
    name_2:        3C295 CLUSTER
    descr_1:       F,404
    pos_1:         RA = 14H 09M 32.3S +/- 0.1S,
    pos_2:         DEC = +52D 26' 25.0" +/- 1.0"
    equinox:       1950.0
    comment_1:     THE FIELD CONTAINS MANY FAINT
    comment_2:     GALAXIES IN THE RANGE
    comment_3:     21 < V < 25.
    fluxnum_1:     1
    fluxval_1:     SURF(V) = 23.0 +/- 1.0

!

    targnum:       6
    name_1:        GAL-CLUS-030330+1706
    name_2:        HOG CLUSTER 3HCL2
    descr_1:       F,404
    pos_1:         RA = 03H 03M 27.2S +/- 0.1S,
    pos_2:         DEC = +17D 07' 44.0" +/- 1.0"
    equinox:       1950.0
    comment_1:     THE FIELD CONTAINS MANY FAINT
    comment_2:     GALAXIES IN THE RANGE
    comment_3:     21 < V < 25.
    fluxnum_1:     1
    fluxval_1:     SURF(V) = 23.0 +/- 1.0

!

    targnum:       7
    name_1:        GAL-CLUS-093942+4713-FLD2
    name_2:        ABELL 851
    descr_1:       F,404
    pos_1:         RA = 09H 39M 48.0S +/- 0.1S,
    pos_2:         DEC = +47D 09' 51.0" +/- 1.0"
    equinox:       1950.0
    comment_1:     THE FIELD CONTAINS MANY FAINT
    comment_2:     GALAXIES IN THE RANGE
    comment_3:     21 < V < 25.
    fluxnum_1:     1
    fluxval_1:     SURF(V) = 23.0 +/- 1.0

!

    targnum:       8
    name_1:        GAL-CLUS-ABELL370-FLD2
    descr_1:       F,404
    pos_1:         RA = 02H 37M 28.6S +/- 0.1S,
    pos_2:         DEC = -01D 49' 36.0" +/- 1.0"
    equinox:       1950.0
    comment_1:     THE FIELD CONTAINS MANY FAINT
    comment_2:     GALAXIES IN THE RANGE
    comment_3:     21 < V < 25.
    fluxnum_1:     1
    fluxval_1:     SURF(V) = 23.0 +/- 1.0

!
! end of fixed targets

! No solar system records found

! No generic target records found

exposure_logsheet:

    linenum:       1.100
    targname:      GAL-CLUS-001558+1609
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F814W
    num_exp:       4
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_1:         CYCLE 4 / 1.1-1.4;
    req_2:         POS TARG +10,+10;
    req_3:         GROUP 1.1-1.4 WITHIN 7D;
    req_4:         SAME ORIENT FOR 1.2-1.4 AS 1.1;
    req_5:         ORIENT 135D +/- 90D;
    comment_1:     POS TARG +10,+10 PLACES TARGET
    comment_2:     COORDS ~AT APEX OF PYRAMID. 
    comment_3:     "GROUP WITHIN 7D" MAY BE RELAXED
    comment_4:     SO LONG AS BOTH "SAME ORIENT" AND 
    comment_5:     "ABSOLUTE ORIENT" CONSTRAINTS CAN
    comment_6:     STILL BE MET VIA OFF-NOMINAL ROLL.

!

    linenum:       1.200
    targname:      GAL-CLUS-001558+1609
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F555W
    num_exp:       3
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_1:         SAME POS FOR 1.2 AS 1.1

!

    linenum:       1.300
    targname:      GAL-CLUS-001558+1609
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F814W
    num_exp:       4
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_2:         POS TARG +12,+12;
    comment_1:     OFFSET 2 ARCSEC IN X AND 2
    comment_2:     ARCSEC IN Y TO DISPLACE
    comment_3:     OBJECTS FROM PIXEL DEFECTS
    comment_4:     AND FROM SEAMS OF PYRAMID

!

    linenum:       1.400
    targname:      GAL-CLUS-001558+1609
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F555W
    num_exp:       3
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_1:         SAME POS FOR 1.4 AS 1.3

!

    linenum:       2.100
    targname:      GAL-CLUS-005431-2756
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F814W
    num_exp:       4
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_1:         CYCLE 4 / 2.1-2.4;
    req_2:         POS TARG +10,+10;
    req_3:         GROUP 2.1-2.4 WITHIN 7D;
    req_4:         SAME ORIENT FOR 2.2-2.4 AS 2.1;
    req_5:         ORIENT 300D +/- 20D;
    comment_1:     POS TARG +10,+10 PLACES TARGET
    comment_2:     COORDS ~AT APEX OF PYRAMID.
    comment_3:     "GROUP WITHIN 7D" MAY BE RELAXED
    comment_4:     SO LONG AS BOTH "SAME ORIENT" AND 
    comment_5:     "ABSOLUTE ORIENT" CONSTRAINTS CAN
    comment_6:     STILL BE MET VIA OFF-NOMINAL ROLL.

!

    linenum:       2.200
    targname:      GAL-CLUS-005431-2756
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F555W
    num_exp:       3
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_1:         SAME POS FOR 2.2 AS 2.1

!

    linenum:       2.300
    targname:      GAL-CLUS-005431-2756
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F814W
    num_exp:       4
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_2:         POS TARG +12,+12;
    comment_1:     OFFSET 2 ARCSEC IN X AND
    comment_2:     2 ARCSEC IN Y TO DISPLACE
    comment_3:     OBJECTS FROM PIXEL DEFECTS
    comment_4:     AND FROM SEAMS OF PYRAMID

!

    linenum:       2.400
    targname:      GAL-CLUS-005431-2756
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F555W
    num_exp:       3
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_1:         SAME POS FOR 2.4 AS 2.3

!

    linenum:       3.100
    targname:      GAL-CLUS-160134+4254
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F702W
    num_exp:       4
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_1:         CYCLE 4 / 3.1-3.2;
    req_2:         POS TARG +10,+10;
    req_3:         GROUP 3.1-3.2 WITHIN 7D;
    req_4:         SAME ORIENT FOR 3.2 AS 3.1;
    req_5:         ORIENT 135D +/- 10D;
    comment_1:     POS TARG +10,+10 PLACES TARGET
    comment_2:     COORDS ~AT APEX OF PYRAMID.
    comment_3:     "GROUP WITHIN 7D" MAY BE RELAXED
    comment_4:     SO LONG AS BOTH "SAME ORIENT" AND 
    comment_5:     "ABSOLUTE ORIENT" CONSTRAINTS CAN
    comment_6:     STILL BE MET VIA OFF-NOMINAL ROLL.

!

    linenum:       3.200
    targname:      GAL-CLUS-160134+4254
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F702W
    num_exp:       4
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_2:         POS TARG +12,+12;
    comment_1:     OFFSET 2 ARCSEC IN X AND
    comment_2:     2 ARCSEC IN Y TO DISPLACE
    comment_3:     OBJECTS FROM PIXEL DEFECTS
    comment_4:     AND FROM SEAMS OF PYRAMID

!

    linenum:       4.100
    targname:      GAL-CLUS-041234-6558
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F814W
    num_exp:       4
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_1:         CYCLE 4 / 4.1-4.4;
    req_2:         POS TARG +10,+10;
    req_3:         GROUP 4.1-4.4 WITHIN 7D;
    req_4:         SAME ORIENT FOR 4.2-4.4 AS 4.1;
    req_5:         ORIENT 4D +/- 10D;
    comment_1:     POS TARG +10,+10 PLACES TARGET
    comment_2:     COORDS ~AT APEX OF PYRAMID.
    comment_3:     "GROUP WITHIN 7D" MAY BE RELAXED
    comment_4:     SO LONG AS BOTH "SAME ORIENT" AND 
    comment_5:     "ABSOLUTE ORIENT" CONSTRAINTS CAN
    comment_6:     STILL BE MET VIA OFF-NOMINAL ROLL.

!

    linenum:       4.200
    targname:      GAL-CLUS-041234-6558
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F555W
    num_exp:       3
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_1:         SAME POS FOR 4.2 AS 4.1

!

    linenum:       4.300
    targname:      GAL-CLUS-041234-6558
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F814W
    num_exp:       3
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_2:         POS TARG +12,+12;
    comment_1:     OFFSET 2 ARCSEC IN X AND
    comment_2:     2 ARCSEC IN Y TO DISPLACE
    comment_3:     OBJECTS FROM PIXEL DEFECTS
    comment_4:     AND FROM SEAMS OF PYRAMID

!

    linenum:       4.400
    targname:      GAL-CLUS-041234-6558
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F555W
    num_exp:       3
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_1:         SAME POS FOR 4.4 AS 4.3

!

    linenum:       5.100
    targname:      GAL-CLUS-140933+5226
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F702W
    num_exp:       3
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_1:         CYCLE 4 / 5.1-5.2;
    req_2:         POS TARG +10,+10;
    req_3:         GROUP 5.1-5.2 WITHIN 7D;
    req_4:         SAME ORIENT FOR 5.2 AS 5.1;
    req_5:         ORIENT 110D +/- 10D;
    comment_1:     POS TARG +10,+10 PLACES TARGET
    comment_2:     COORDS ~AT APEX OF PYRAMID.
    comment_3:     "GROUP WITHIN 7D" MAY BE RELAXED
    comment_4:     SO LONG AS BOTH "SAME ORIENT" AND 
    comment_5:     "ABSOLUTE ORIENT" CONSTRAINTS CAN
    comment_6:     STILL BE MET VIA OFF-NOMINAL ROLL.

!

    linenum:       5.200
    targname:      GAL-CLUS-140933+5226
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F702W
    num_exp:       3
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_2:         POS TARG +12,+12;
    comment_1:     OFFSET 2 ARCSEC IN X AND
    comment_2:     2 ARCSEC IN Y TO DISPLACE
    comment_3:     OBJECTS FROM PIXEL DEFECTS
    comment_4:     AND FROM SEAMS OF PYRAMID

!

    linenum:       6.100
    targname:      GAL-CLUS-030330+1706
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F702W
    num_exp:       3
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_1:         CYCLE 4 / 6.1-6.2;
    req_2:         POS TARG +10,+10;
    req_3:         GROUP 6.1-6.2 WITHIN 7D;
    req_4:         SAME ORIENT FOR 6.2 AS 6.1;
    req_5:         ORIENT 225D +/- 10D;
    comment_1:     POS TARG +10,+10 PLACES TARGET
    comment_2:     COORDS ~AT APEX OF PYRAMID.
    comment_3:     "GROUP WITHIN 7D" MAY BE RELAXED
    comment_4:     SO LONG AS BOTH "SAME ORIENT" AND 
    comment_5:     "ABSOLUTE ORIENT" CONSTRAINTS CAN
    comment_6:     STILL BE MET VIA OFF-NOMINAL ROLL.

!

    linenum:       6.200
    targname:      GAL-CLUS-030330+1706
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F702W
    num_exp:       3
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_2:         POS TARG +12,+12;
    comment_1:     OFFSET 2 ARCSEC IN X AND
    comment_2:     2 ARCSEC IN Y TO DISPLACE
    comment_3:     OBJECTS FROM PIXEL DEFECTS
    comment_4:     AND FROM SEAMS OF PYRAMID

!

    linenum:       7.100
    targname:      GAL-CLUS-093942+4713-FLD2
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F814W
    num_exp:       1
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_1:         CYCLE 4 / 7.1-7.41;
    req_2:         POS TARG +10,+10;
    req_3:         GROUP 7.1-7.41 WITHIN 7D;
    req_4:         SAME ORIENT FOR 7.11-7.41 AS 7.1;
    req_5:         ORIENT 135D +/- 90D;
    comment_1:     POS TARG +10,+10 PLACES TARGET
    comment_2:     COORDS ~AT APEX OF PYRAMID.
    comment_3:     "GROUP WITHIN 7D" MAY BE RELAXED
    comment_4:     SO LONG AS BOTH "SAME ORIENT" AND 
    comment_5:     "ABSOLUTE ORIENT" CONSTRAINTS CAN
    comment_6:     STILL BE MET VIA OFF-NOMINAL ROLL.

!


    linenum:       7.110
    targname:      GAL-CLUS-093942+4713-FLD2
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F814W
    num_exp:       1
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_5:         SAME POS FOR 7.11 - 7.21 AS 7.1

!


    linenum:       7.120
    targname:      GAL-CLUS-093942+4713-FLD2
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F814W
    num_exp:       1
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO

!

    linenum:       7.200
    targname:      GAL-CLUS-093942+4713-FLD2
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F555W
    num_exp:       1
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=0.5,
    param_2:       CR-TOLERANCE=0.0
    comment_1:     CR-SPLIT=0.5 BECAUSE LESS THAN 6
    comment_2:     EXPOSURES FOR COSMIC RAY REJECTION.
    comment_3:     THIS WILL RESULT IN 4 X 1000S
    comment_4:     EXPOSURES SINCE EACH 2100S/2=1050S
    comment_5:     WILL BE ROUNDED DOWN TO THE NEXT
    comment_6:     LOWEST LEGAL WFPC2 EXP TIME OF 1000S.

!


    linenum:       7.210
    targname:      GAL-CLUS-093942+4713-FLD2
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F555W
    num_exp:       1
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=0.5,
    param_2:       CR-TOLERANCE=0.0

!

    linenum:       7.300
    targname:      GAL-CLUS-093942+4713-FLD2
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F814W
    num_exp:       1
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_2:         POS TARG +12,+12;
    comment_1:     OFFSET 2 ARCSEC IN X AND
    comment_2:     2 ARCSEC IN Y TO DISPLACE
    comment_3:     OBJECTS FROM PIXEL DEFECTS
    comment_4:     AND FROM SEAMS OF PYRAMID

!


    linenum:       7.310
    targname:      GAL-CLUS-093942+4713-FLD2
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F814W
    num_exp:       1
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_2:         SAME POS FOR 7.31 - 7.41 AS 7.3

!


    linenum:       7.320
    targname:      GAL-CLUS-093942+4713-FLD2
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F814W
    num_exp:       1
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO

!

    linenum:       7.400
    targname:      GAL-CLUS-093942+4713-FLD2
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F555W
    num_exp:       1
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=0.5,
    param_2:       CR-TOLERANCE=0.0
    comment_1:     CR-SPLIT=0.5 BECAUSE LESS THAN 6
    comment_2:     EXPOSURES FOR COSMIC RAY REJECTION.
    comment_3:     THIS WILL RESULT IN 4 X 1000S
    comment_4:     EXPOSURES SINCE EACH 2100S/2=1050S
    comment_5:     WILL BE ROUNDED DOWN TO THE NEXT
    comment_6:     LOWEST LEGAL WFPC2 EXP TIME OF 1000S.


!


    linenum:       7.410
    targname:      GAL-CLUS-093942+4713-FLD2
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F555W
    num_exp:       1
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=0.5,
    param_2:       CR-TOLERANCE=0.0


!

    linenum:       8.100
    targname:      GAL-CLUS-ABELL370-FLD2
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F814W
    num_exp:       3
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_1:         CYCLE 4 / 8.1-8.4;
    req_2:         POS TARG +10,+10;
    req_3:         GROUP 8.1-8.4 WITHIN 7D;
    req_4:         SAME ORIENT FOR 8.2-8.4 AS 8.1;
    req_5:         ORIENT 135D +/- 90D;
    comment_1:     POS TARG +10,+10 PLACES TARGET
    comment_2:     COORDS ~AT APEX OF PYRAMID.
    comment_3:     "GROUP WITHIN 7D" MAY BE RELAXED
    comment_4:     SO LONG AS BOTH "SAME ORIENT" AND 
    comment_5:     "ABSOLUTE ORIENT" CONSTRAINTS CAN
    comment_6:     STILL BE MET VIA OFF-NOMINAL ROLL.

!

    linenum:       8.200
    targname:      GAL-CLUS-ABELL370-FLD2
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F555W
    num_exp:       2
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=0.5,
    param_2:       CR-TOLERANCE=0.0
    req_1:         SAME POS FOR 8.2 AS 8.1
    comment_1:     CR-SPLIT=0.5 BECAUSE LESS THAN 6
    comment_2:     EXPOSURES FOR COSMIC RAY REJECTION.
    comment_3:     THIS WILL RESULT IN 4 X 1000S
    comment_4:     EXPOSURES SINCE EACH 2100S/2=1050S
    comment_5:     WILL BE ROUNDED DOWN TO THE NEXT
    comment_6:     LOWEST LEGAL WFPC2 EXP TIME OF 1000S.

!

    linenum:       8.300
    targname:      GAL-CLUS-ABELL370-FLD2
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F814W
    num_exp:       3
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=NO
    req_2:         POS TARG +12,+12;
    comment_1:     OFFSET 2 ARCSEC IN X AND
    comment_2:     2 ARCSEC IN Y TO DISPLACE
    comment_3:     OBJECTS FROM PIXEL DEFECTS
    comment_4:     AND FROM SEAMS OF PYRAMID

!

    linenum:       8.400
    targname:      GAL-CLUS-ABELL370-FLD2
    config:        WFPC2
    opmode:        IMAGE
    aperture:      WFALL-FIX
    sp_element:    F555W
    num_exp:       2
    time_per_exp:  2100S
    priority:      1
    param_1:       CR-SPLIT=0.5,
    param_2:       CR-TOLERANCE=0.0
    req_1:         SAME POS FOR 8.4 AS 8.3
    comment_1:     CR-SPLIT=0.5 BECAUSE LESS THAN 6
    comment_2:     EXPOSURES FOR COSMIC RAY REJECTION.
    comment_3:     THIS WILL RESULT IN 4 X 1000S
    comment_4:     EXPOSURES SINCE EACH 2100S/2=1050S
    comment_5:     WILL BE ROUNDED DOWN TO THE NEXT
    comment_6:     LOWEST LEGAL WFPC2 EXP TIME OF 1000S.

!
! end of exposure logsheet

! No scan data records found