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Hubble Space Telescope
February 2013 STAN

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| STScI Analysis Newsletter (STAN) 
| Cosmic Origins Spectrograph (COS)
| February 2013
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In this Newsletter we provide some updates of interest to 
COS users who will be drafting and submitting Phase 1 
HST programs over the next weeks.  

Contents:


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Update to the dark rates of the COS FUV segments and 
impact on ETC calculations for Phase I proposals

The dark rate on both detectors has been evolving with time, 
particularly in the last few months, and it is now a factor 
of two lower than the value currently used in the ETC for both 
segments.










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