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Space Telescope Imaging Spectrograph
STAN - July 2000

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| HST Spectroscopy                      STIS/GHRS/FOS |
| STScI Analysis Newsletter                 July 2000 |
|                                                     |
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Changes to Cycle 10 process for STIS proposals


FUV-MAMA Repeller Off as an Available Mode for High 
Resolution Spectroscopy


Jul 2000-Reference File Updates


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Changes to Cycle 10 process for STIS proposals

There are two significant changes to the Cycle 10 
proposal process, with impact to STIS observations. 


FUV-MAMA Repeller Off as an Available Mode for High
Resolution Spectroscopy

We advertise the opportunity for proposals that would 
push STIS to the limiting resolving power in the FUV. 
We find that the FUV-MAMA has improved resolving power 
(at the cost of sensitivity) when the repeller-wire
high-voltage is turned off. Application is recommended 
shortward of 1400A, only for the FUV echelle modes 
E140H, and possibly for E140M, when applied with the 
0.1x0.03 aperture, the so-called "Jenkins slit." 


Jul 2000-Reference File Updates

Many updated reference files have been installed in the 
calibration pipeline.  The darks and biases are now 
complete through June 2000, the pht table was updated 
using revised flux distributions of the white dwarf 
standard stars, the sdc table was modified so that the 
value of CRPIX2 no longer shift the field of view to 
center the target in the x2d file, and the dispersion 
coefficients for first order MAMA modes was updated 
using in-flight data.  

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List of Recent Preprints Online
    
 The list of preprints based on HST spectrographs data
 that used to occupy this space is now available at 
 http://www.stsci.edu/science/preprints/ for easy browsing.
    
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