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| GGGGGGG HH HH RRRRR SSS |
STScI | GG HH HH RR R SS | STAN - GHRS
Analysis | GG GGG HHHHHH RRRRR SS | Number 4
News | GG GG HH HH RR R SS | January 1995
| GGGGGGG HH HH RR R SSS |
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CONTENTS:
- HELP FOR PHASE II PROGRAM DEVELOPMENT AND IMPLEMENTATION
- GHRS NEWS
- LATEST GHRS PREPRINTS
- Appendix: GHRS CONTACTS
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HELP FOR PHASE II PROGRAM DEVELOPMENT AND IMPLEMENTATION
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Each cycle 5 PI has at their disposal two people, their Program Coordinator
(PC) and Liaison Scientist (LS), dedicated to helping them develop and
implement their phase II HST program.
By now, all cycle 5 PIs should have been contacted by their PC/LS team, and
received their preliminary phase II template, and a submission timeframe for
their phase II program. Detailed instructions on the phase II submission were
sent out to cycle 5 PIs in December.
PIs should feel free to contact their PC or LS for help at any time up through
the execution of their cycle 5 HST program. The PCs will maintain a file of
advisories on RPS2, for example, so that known problems and recommended
workarounds can be accessed easily. Look for this advisory list (and other
Phase II documentation) in the World Wide Web page for Phase II Proposal
Development.
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GHRS NEWS
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GHRS operations over the past month have been both productive and smooth. The
relatively frequent carrousel resets of the recent past virtually disappeared
(presumably by pure chance; they come and go), despite many programs being run.
The cure for the reset problem is now being worked on and should be installed
as part of the regular operations soon.
Users planning GHRS observations often need to know the ratio of throughputs
for the Small Science Aperture (SSA) compared to the Large Science Aperture
(LSA). The sensitivities of the various gratings are specified for the LSA,
so this ratio is needed to estimate exposure times for SSA spectra. This
ratio is wavelength-dependent, and ranges from about 50 to 70%, as noted in
version 5.0 of the GHRS Instrument Handbook. For the purposes of exposure
estimation we suggest that you use a nominal figure of 50% to be on the safe
side. The precise value for a particular observation depends on the details
of how the star is centered in the SSA and so has some intrinsic uncertainty.
If you wish further information, please contact an Instrument Scientist
(soderblom@stsci.edu).
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LATEST GHRS PREPRINTS
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We draw your attention to these papers, based on GHRS data, that will appear in
the next few months. This list includes all preprints received by the STScI
Library not yet published in the journals.
Please remember to include our Library in your preprint distribution list.
"GHRS Observations of Cool, Low-Gravity Stars. II. Flow and Turbulent
Velocities in the Outer Atmosphere of Gamma Cru (M3.4 III)".
Carpenter, K.G.; Robinson, R.D., and Judge, P.G. ApJ, in press.
Vibrationally excited H2, HCl, and NO+ in the diffuse clouds towards Zeta
Ophiuchi"
Federman, S.R.; Cardelli, J.A.; Van Dishoeck, E.F.; Lambert, D.L., and Black,
J.H.; ApJ 5-95
Robinson, R.D., and Carpenter, K.G. "Mg II h and k Profiles in High Luminosity,
Late-Type Stars" in press.
Composition of interstellar clouds in the disk and halo. III. HD 149881"
Spitzer, L. Jr.; Fitzpatrick, E.L.; ApJ accepted
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APPENDIX: GHRS contacts
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Any questions about the scheduling of your observations should be addressed to
your PRESTO contact. If you do not know who this person is, PRESTO's Mosaic
page contains that information.
Any post-observation questions concerning calibration, data analysis, software,
etc. can be addressed to analysis@stsci.edu or by calling 410-338-1082.
These contacts will forward any detailed questions to the GHRS Instrument
Scientists, who are:
David Soderblom soderblom@stsci.edu 410-338-4543
Claus Leitherer leitherer@stsci.edu 410-338-4425
Steve Hulbert hulbert@stsci.edu 410-338-4911
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Comments about this newsletter, questions, requests for issues, addition or
deletions to the mailing list, etc. can be e-mailed to analysis@stsci.edu
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The Space Telescope Science Institute is operated by the Association of
Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555.
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