STScI Logo

Space Telescope Imaging Spectrograph
STAN - September 2001

+----------------------------------------------------------+
| HST Spectroscopy                           STIS/GHRS/FOS |
| STScI Analysis Newsletter                      Sep 2001  |
+----------------------------------------------------------+



ST-ECF Post Operational HST Archives 


Errors in Processed TIME-TAG Data from STIS Now Corrected


CALSTIS V2.11 Release Notes


Improvement in STIS Echelle Dispersion Solutions
 

+-FOS------------------------------------------------------+


ST-ECF Post Operational HST Archives

The Post-Operational Archives (POA) branch of the Space
Telescope - European Coordinating Facility (ST-ECF) has
taken over the main responsibility of FOS (re-)calibration.
Their web pages contain all of the information that was
previously on the STScI FOS pages, supplemented with more
recent FOS news including a new and improved version of the
FOS calibration pipeline (POA_CALFOS), which replaces CALFOS
in the standard IRAF/STSDAS FOS calibration. We invite you 
to check out their web pages.

+-STIS-----------------------------------------------------+


Errors in Processed TIME-TAG Data from STIS Now Corrected

As discussed in the March 2001 STAN, various errors may
exist in TIME-TAG datasets. New archive software installed
on 13 Sep 2001 repairs all known problems in TIME-TAG
datasets. Every dataset retrieved after 13 Sep 2001 should
be free of TIME-TAG errors.



CALSTIS V2.11 Release Notes

Calstis Version 2.11 was installed in the OTFR pipeline on
2001-Sep-13. It is available for download in the new STSDAS
release, Version 5.11, which can be found at the STSDAS
Advisories page. Below we give more details on changes
that are likely to be noticed by users in their data.



Improvement in STIS Echelle Dispersion Solutions

The latest CALSTIS release (13.1) explicitly considers
monthly offsets when determining echelle wavelength
solutions, yielding more robust and accurate wavelength
solutions.

+----------------------------------------------------------+
| Need help? http://www.stsci.edu/hst/stis/help.html
+----------------------------------------------------------+
| To subscribe or unsubscribe to the STAN, send a message
| to majordomo@stsci.edu with a blank subject line and
| the following in the body: [un]subscribe stis_news
+----------------------------------------------------------+
| The Space Telescope Science Institute is operated by the
| Association of Universities for Research in Astronomy,
| Inc., under NASA contract NAS5-26555.
+----------------------------------------------------------+