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Space Telescope Imaging Spectrograph
STAN - June 2008

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| HST Spectroscopy
| STScI Analysis Newsletter
| STIS/GHRS/FOS
| June 2008
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Visit the "New in the Last 45 Days" section of the STIS 
website at http://www.stsci.edu/hst/stis for new
information about STIS.

This and previous issues of the STAN can be found at 
http://www.stsci.edu/hst/stis/documents/newsletters.

CONTENTS:

-Changes in the latest release of the STIS ETC.

-STIS Bright Object Protection Requirements for GOs in Phase II

-Recent improvements in the STIS Calibration Pipeline and Data  
Analysis Tools

-Changes in Treatment of STIS GO-WAVECAL Exposures (TARGET=WAVE)

-Differences in retrieval and calibration of pre-repair and  
post-repair STIS data


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Changes in the latest release of the STIS ETC

A number of improvements have been made in the latest
release of the STIS ETC, including improvements in the
calculation of background limited exposures.


STIS Bright Object Protection Requirements for GOs in Phase II

Guest Observers using STIS/MAMA configurations are required 
to submit bright-object reviews of all their targets and fields.
We review the policies and tools which can be used for these 
reviews.


Recent improvements in the STIS Calibration Pipeline and Data Analysis Tools

STScI has recently completed an extensive
re-calibration of all STIS data taken before the failure of STIS
in August 2004. Many of the changes incorporated in this 
re-calibration, along with recent improvements in some STIS data
analysis tools,  were recently described by Holfeltz et al. 2008
(AAS Meeting 211, Abstract #135.10).  This poster is reproduced
here.


Changes in Treatment of STIS GO-WAVECAL Exposures (TARGET=WAVE)

We discuss some changes to the way TARGET=WAVE
observations are treated by the pipeline calibration.  If
automatic wavecal observations are turned off, the pipeline can
now automatically use any available GO specified TARGET=WAVE
lamp exposures to perform the wavelength calibration.


Uniform Recalibration of All STIS Data

After STIS is repaired, older, pre-repair STIS  data
will continue to be retrieved from a static archive, while newer
post-SM4 data will be automatically re-calibrated by the OTFR
system each time they are retrieved.



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