COS FUV Gridwire Flat Field Template

Details COS FUV Gridwire Flat Field Template COS FUV Gridwire Flat Field Template

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011cos..rept....3e&link_type=abstract

Instrument Science Report COS 2011-03, 20 pages

Physics

Cosmic Origins Spectrograph, Cos, Space Telescope Science Institute, Hubble Telescope, Hst

Scientific paper

The procedures used to develop and test the COS FUV fixed pattern noise template to correct the gridwire shadows in the G130M and G160M gratings are described. 1-D templates were derived by the FP-split technique. These were replicated over the active areas of the detectors to create 2-D flat fields that are easily implemented in CalCOS. The flat fields were tested on a number of high signal-to-noise data sets. The result show an increase in both the quality of the spectrum and the amount of useable spectra. Signal-to-noise ratios over regions affected by the gridwire shadows have an average increase of 30% for segment A and 26% for segment B in x1dsum combined spectra utilizing more than 1 FP-POS. We also describe an alternative approach to deriving 1-D flat field templates whose results agree well with the templates determined from the FP-split algorithm and which produces well defined errors. We use these templates to characterize the fixed pattern noise which remains after the gridwires have been corrected and to estimate the ultimate signal-to-noise capabilities of COS x1dsum data.

Affiliated with

Also associated with

No associations

Rating

COS FUV Gridwire Flat Field Template does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with COS FUV Gridwire Flat Field Template, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and COS FUV Gridwire Flat Field Template will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1023847