9200(  1) - 12/20/00 23:40  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      9200
                                                       Version: 1
                                                       Check-in Date: 20-Dec-2000
                                                                      23:32:46

1.Proposal Title:
Characterizing the CCD Spectroscopic Point Spread Function in STIS
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2. Proposal For  3. Cycle
AR               10
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4. Investigators
                                                                                     Contact?
    PI: Theodore Gull                     Goddard Space Flight Center
   CoI: Dr. Bruce Woodgate                Goddard Space Flight Center                   N
   CoI: Dr. Randy Kimble                  Goddard Space Flight Center                   N
   CoI: Dr. Charles Bowers                Goddard Space Flight Center                   N
   CoI: Mr. Don Lindler                   ACC                                           N
   CoI: Dr. Carol Grady                   NOAO                                          N
   CoI: Dr. Phil Plait                    ACC                                           N
   CoI: Dr. Kazunori Ishibashi            NAS/NRC                                       N
   CoI: Dr. Charles Proffitt              Space Telescope Science Institute             N

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5. Abstract

High spatial resolution spectral imaging, as done by HST/STIS, has come of age in
the last few years with observations of stellar winds and outflows, extragalactic
and galactic jets, and rotation curves of galaxies. The potential of this technique
is only now becoming realized, since some of the most exciting applications, such as
imaging of outflows on sub-arcsecond scales, and studies of the composition of
circumstellar disks, require a detailed understanding of the spatial component of
the PSF in STIS's spectral imaging modes. Progress has been made toward this goal
with observations (calibration proposal 8844) to characterize the wavelength-
dependent PSF for 4 stars: BD+75D325, a white dwarf; HD141653, an A0V star;
HD115617, a G0V star; and HD181204, an M III-I star. We request funding to complete
a study of the wavelength-dependent STIS CCD PSF. This information is essential to
fully characterize the instrumental scattered light that adds to the scattered light
from the HST primary and secondary mirror. We plan to provide example spectral data
as reference for users who intend to measure properties of faint objects in the
vicinity of bright stars. Models of the scatter effects will be built to provide
better understanding on what can be accomplished with STIS. Also, the data will feed
into models for imaging faint sources in the close vicinity of bright point sources.
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                                                9200(  1) - 12/20/00 23:40  - [  2]

            Summary Form for Proposal  9200

  Item                         Used in this proposal
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  Proposal Category            AR
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