Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/instrument_news/FOS/stans/fos_stan1 Дата изменения: Sat Aug 24 02:45:31 1996 Дата индексирования: Sun Dec 23 00:57:51 2007 Кодировка: Поисковые слова: http astrokuban.info astrokuban

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| FFFFFF OOOOOO SSS |
STScI | FF OO OO SS | STAN - FOS
Analysis | FFFF OO OO SS | Number 1
News | FF OO OO SS | October 1994
| FF OOOOOO SSS |
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* * * W E L C O M E * * *

You just received the first issue of STAN, STScI's Analysis Newsletter. This
publication will arrive in your electronic mailbox monthly. It will contain
brief articles of interest to all users of HST data.

This first mailing of STAN-FOS is being sent to Principal Investigators. Please
let us know if there are other people on your team that you would like us to
add to our distribution list (e.g., Co-I's, postdocs, graduate students, etc.).

================================================================================

CONTENTS:


- FOS NEWS
+ Access to FOS information
+ POST-COSTAR inverse sensitivity calibration
+ Spectrophotometry absolute flux system change

- GETTING THE LATEST SCHEDULING INFORMATION.

- THE ANALYSIS TEAMS: A PILOT PROJECT TO IMPROVE POST-OBSERVATION USER SUPPORT

- APPENDIX: FOS CONTACTS

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FOS NEWS
--------
by Anuradha Koratkar (koratkar@stsci.edu)
FOS Instrument scientist

Access to FOS information
-------------------------

All calibration news on the FOS can be accessed via the Space Telescope
Electronic Information System (STEIS) or via the World Wide Web (WWW). The
Universal Resource Locator (URL) which gives access is :
http://www.stsci.edu:80/ftp/instrument_news/fos.
The information via STEIS and the WWW is the same because WWW accesses the
STEIS "page".

News of recent important FOS announcements and new postings to STEIS can be
found in the WHATS_NEW.TXT file on STEIS. Both the TABLE_OF_CONTENTS.TXT and
WHATS_NEW.TXT files will be updated on a continuing basis. The various
subdirectories contain information on dead diodes, flat fields, polarimetry
recommended reference files and other issues.


POST-COSTAR inverse sensitivity calibration
-------------------------------------------

Observationally-derived FOS Inverse Sensitivity (IVS) reference files based
upon POST-COSTAR observation for all usable detector/disperser combinations
with both the 4.3 and 1.0 apertures have been delivered to the calibration
pipeline.

** ALL POST-COSTAR FOS OBSERVATIONS OBTAINED PRIOR TO 25 MARCH 1994 DATE SHOULD
** BE RE-PROCESSED WITH THE NEW REFERENCE FILES.

Additionally, theoretically-derived IVS reference files for the 0.5, 0.3,
0.25x2.0 (SLIT), 1.0-PAIR, 0.5-PAIR, and 0.25-PAIR apertures have been
delivered. The latter set of files is based upon the 1.0 aperture
observationally-derived IVS for each spectral element as modified by the
theoretical POST-COSTAR aperture throughput ratio of each aperture relative to
the 1.0 aperture. Expected uncertainties in the theoretical IVS curves are of
the order of 5%. The theoretical IVS files will be replaced with
observationally-derived files after appropriate Cycle 4 photometric calibration
observations have been performed.


Spectrophotometry absolute flux system change
---------------------------------------------

As part of an ongoing effort to improve the absolute spectrophotometry
calibration from 1150 to 8500A, the flux scale for all FOS spectra obtained
post-COSTAR deployment in Cycle 4 is based on a pure hydrogen white dwarf model
atmosphere calculation for G191B2B. The change is fairly significant at short
wavelengths, and is compared to the IUE-based flux calibration (Bohlin et al.,
990, ApJ, 73, 413) in the table below.

Sample changes in the ratio of NEW/OLD fluxes are:

l (A) change(%)

1200 -5
1400 13
1500 5
1600 12
1800 8
2000 7
2200 7
2400 4
2600 4
2800 5
>3000 <3


All Instrument Science Reports (ISRs) can be requested from the FOS Analysis
Team. The abstracts are posted on STEIS. If you require any information on any
aspect of your FOS data analysis or reduction, please do not hesitate to contact
the FOS Analysis Team, or the FOS Instrument Scientists.

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GETTING THE LATEST SCHEDULING INFORMATION
-----------------------------------------
- Mark Johnston (johnston@stsci.edu)
PRESTO Project Lead

You can check the implementation and scheduling status of your observations
by using the PRESTO (Project to Re-Engineer Space Telescope Observing) public
page available via the World-Wide Web. This is most easily accessed through
the Mosaic client program (as described below), although other WWW browsers
are also available. The PRESTO page provides a wealth of information about the
status of the HST observing program, including the weekly timelines. Once the
developing long-range observing plan is in place, it will also be
available in this page.


1. Open MOSAIC. You may need to check with your system administrator
for site specific information. For example, at STScI the command is:

Mosaic

2. Get into the PRESTO homepage. Click on the "Open" button at the
bottom of the screen, and enter:

http://presto.stsci.edu/public/propinfo.html

An alternative way into PRESTO is through the Space Telescope
Electronic Information Service (STEIS) (http://www.stsci.edu/top.html)
by going to the OBSERVER INFORMATION paragraph and clicking on PROGRAM STATUS.

NOTE: You might want to save this MOSAIC address by using the
"Navigate" pull down menu along the top, then the "Hotlist" button,
and the "Add Current". In the future you can just use the "Hotlist" to
open the PRESTO homepage.

3. Enter your program ID in the box and click on "Get Program Information".

4. Click on "Visit Status Information".

5. To save the information to a file click on the "Save as ..."
at the bottom of the page, name the file, and click on "OK".

6. Click on the "Close Window" to exit Mosaic.

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THE ANALYSIS TEAMS: A PILOT PROJECT TO IMPROVE POST-OBSERVATION USER SUPPORT
----------------------------------------------------------------------------
- Brad Whitmore (whitmore@stsci.edu)
A-Team Project Coordinator

We are pleased to announce a new initiative designed to improve the
post-observation user support at STScI. The Analysis Team (= A-Team)
is a pilot project developed to address your main concerns, as
determined from the post-observation user support survey circulated
last spring. We plan to focus on:

- Providing accurate, timely, and easily understood calibration
information.

- Optimizing contacts with STScI, with the goal of providing a
single point of contact for your post-observation questions.

- Improving documentation and analysis tools.

Each Analysis Team consists of an active research astronomer (the
Analysis Scientist), one or two research assistants (the Analysis
Specialists), and a scientific programmer (the Analysis Programmer).

Since this is a pilot project we are not able to support all cycle 4
programs. Hence, only WFPC2 and FOS programs are being covered at present. In
addition, very experienced observers and observers with other means of support
(e.g., Guaranteed Time Observers, ESA observers, carryover proposals, most
STScI staff, etc.) and programs that completed before 1 October 1994 will
not be covered in the initial plan. However, information of general utility
will be distributed to a wider audience via this newsletter.

If you feel that our services would be especially useful for your program,
and you have not recently been contacted by the A-Team, please contact Krista
Rudloff at analysis@stsci.edu (410-338-1082) and we will add you to our list
of covered proposals.

================================================================================

APPENDIX: FOS contacts
-----------------------

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 (http://presto.stsci.edu/public/propinfo.html) contains that information.


Post-Observation questions should be addressed to the FOS Analysis Team,
if your program is covered by this pilot project (see article above) or
analysis@stsci.edu (410-338-1082).


FOS Analysis Team:
------------------
Analysis Scientist: Jeffrey Hayes - hayes@stsci.edu - 410-338-4936
Analysis Specialist: Jennifer Christensen - christen@stsci.edu - 410-338-1265
Analysis Specialist: Stephan Martin - smartin@stsci.edu - 410-338-4724

FOS Instrument Scientists:
--------------------------
Anne Kinney kinney@stsci.edu 410-338-4831
Anuradha Koratkar koratkar@stsci.edu 410-338-4470
Tony Keyes keyes@stsci.edu 410-338-4975


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Comments, questions, requests for issues, additions 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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