7747( 12) - 10/13/98 17:13  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      7747
                                                       Version: 12
                                                       Check-in Date: 13-Oct-1998
                                                                      17:12:54

1.Proposal Title:
The Relationship Between Lyman-alpha Clouds and Galaxies at z<0.3
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2. Proposal For  3. Cycle
GO/CAR           7
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4. Investigators
                                                                                     Contact?
    PI: Blair Savage                      University of Wisconsin
   CoI: Todd Tripp                        Princeton University                          Y
   CoI: Limin Lu                          Lucent Technologies                           N

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5. Abstract

This is a continuation of the Cycle 6 program GO-6499 in which high S/N spectra of
two bright low-redshift QSOs (PG0953+414 and PG1116+215) were to be obtained with
the GHRS G140L grating. The goal of the observations is to study the relationship
between very weak (rest-frame requivalent width < 300 mA) Ly-alpha clouds and
galaxies. While the observations of PG1116+215 was completed in Cycle 6, PG0953+414
was not observed in Cycle 6 due to the second HST service mission. This Phase II
represents a carryover of the unfinished GO-6499 program in which observations of
PG0953+414 will be carried out using the STIS/FUV-MAMA and the E140M grating. The
STIS observations are expected to reach the same sensitivity as the initially-
planned GHRS observations, thus allowing us to carry out the same scientific
analyses.
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  Observations Description
  ------------------------

     STIS observations of PG 0953+414 will be made using the E140M grating, the MAMA
     FUV detector, and the 0.2x0.2" aperture. Standard (default) parameters will be
     used.

  Real Time Justification
  -----------------------

     not applicable

  Calibration Justification
  -------------------------

     not applicable

  Additional Comments
  -------------------

     no additional comments
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                                                7747( 12) - 10/13/98 17:13  - [  2]

  Data Distribution

  Media:           8MM
  Blocking Factor: 10
  Ship To:         Todd Tripp, Princeton University
                   Observatory, Peyton Hall, Princeton,
                   N.J.  08544
  Ship Via:
  Email:           tripp@astro.princeton.edu
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                                                7747( 12) - 10/13/98 17:13  - [  3]

TARGET LIST    a) Fixed Targets
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Tar|   Target   |         Target        |            Target              |Coord   | Radial |             Flux data
No |    Name    |       Description     |           Position             |Eqnx    |  Vel.  |
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1   PG0953+415   Galaxy, QSO, Quasar     RA=9H 56M 52.4S +/- 1", DEC=41D  2000     z=0.234  V = 14.5
                                         15' 22" +/- 1", PLATE-ID=00XW                      F(1400)=3.0+/-0.3e-14

                                                7747( 12) - 10/13/98 17:13  - [  4]

Visit: 01
     Visit Priority:      <none>
     Visit Requirements:  <none>
     On Hold Comments:    <none>
     Additional Comments: <none>


Exposures
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Exposure|   Target  |Instr | Oper. | Aper  |Spectral|Central|             Optional            |Num|  Time |       Special
 Number |    Name   |Config| Mode  |or FOV |Element |Waveln.|            Parameters           |Exp|       |     Requirements
------------------------------------------------------------------------------------------------------------------------------------
101      PG0953+415  STIS/C ACQ     F28X50L MIRROR                                             1   1 S     ONBOARD ACQ FOR 102
                     CD             P
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102      PG0953+415  STIS/C ACQ/PEA 0.2X0.2 MIRROR                                             1   2 S     ONBOARD ACQ FOR 103-104
                     CD     K
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103      PG0953+415  STIS/F ACCUM   0.2X0.2 E140M    1425                                      1   34 M
                     UV-MAM
                     A
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104      PG0953+415  STIS/F ACCUM   0.2X0.2 E140M    1425                                      4   40 M
                     UV-MAM
                     A
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                                                7747( 12) - 10/13/98 17:13  - [  5]

Visit: 02
     Visit Priority:      <none>
     Visit Requirements:  <none>
     On Hold Comments:    <none>
     Additional Comments: <none>


Exposures
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Exposure|   Target  |Instr | Oper. | Aper  |Spectral|Central|             Optional            |Num|  Time |       Special
 Number |    Name   |Config| Mode  |or FOV |Element |Waveln.|            Parameters           |Exp|       |     Requirements
------------------------------------------------------------------------------------------------------------------------------------
201      PG0953+415  STIS/C ACQ     F28X50L MIRROR                                             1   1 S     ONBOARD ACQ FOR 202-203
                     CD             P
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202      PG0953+415  STIS/C ACQ/PEA 0.2X0.2 MIRROR                                             1   2 S     ONBOARD ACQ FOR 203
                     CD     K
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203      PG0953+415  STIS/F ACCUM   0.2X0.2 E140M    1425                                      4   40 M
                     UV-MAM
                     A
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                                                7747( 12) - 10/13/98 17:13  - [  6]

            Summary Form for Proposal  7747

  Item                         Used in this proposal
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  Apertures                    F28X50LP 0.2X0.2
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  Configurations               STIS/CCD STIS/FUV-MAMA
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  Opmodes                      ACQ ACQ/PEAK ACCUM
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  Proposal Category            GO/CAR
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  Special Requirements         ONBOARD ACQ FOR 102 ONBOARD ACQ FOR 103-104 ONBOARD ACQ FOR 202-203 ONBOARD ACQ FOR 203
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  Spectral Elements            MIRROR E140M
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  Target Names                 PG0953+415
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  Wavelengths                  1425
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