7984(  1) - 04/16/98 14:07  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      7984
                                                       Version: 1
                                                       Check-in Date: 16-Apr-1998
                                                                      14:04:31

1.Proposal Title:
HDF Limiting Magnitude/Resolution Extension and Object Variability Search
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2. Proposal For  3. Cycle
AR               7
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4. Investigators
                                                                                     Contact?
    PI: Dr. Ronald Gilliland              Space Telescope Science Institute

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5. Abstract

Further WFPC2 observations of the HDF were obtained 23-26 Dec. '97 as part of my
Cycle 6 program: ``A Search for Supernovae at High Z in the HDF." Science particular
to the SNe search will be funded from the GO-6473 grant; here I propose to: (1)
Release deeper F814W and F300W images. F814W exposures over the non-bright portions
of 18 orbits when added to the existing HDF set will boost total exposure time by
51\ magnitude better by 0.23 mag, with other improvements this rises to 0.35 mag),
and F300W during bright time by 18\ (2) Extend code (and release) development for a
full dithered image set combination that does a better job of preserving clean point
spread functions than the existing HDF (version two) working group release, with an
additional minor gain in background noise level. This is important in particular for
detection of faint point sources and for maintaining PSF stability necessary to
allow resolution enhancement experiments through deconvolution. (3) Perform
exploratory searches for object variability on time scales from 1 hour to 10 days in
the existing HDF data. My approach to the data reductions is unique in maintaining
an easy to analyze auxiliary set of single frames for variability studies.
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  Data Distribution

  Media:           ELECTRONIC
  Blocking Factor: 10
  Ship To:         PI_Address
  Ship Via:
  Email:
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                                                7984(  1) - 04/16/98 14:07  - [  2]

            Summary Form for Proposal  7984

  Item                         Used in this proposal
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  Proposal Category            AR
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