Statistics
Scientific paper
May 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997stis.rept....7b&link_type=abstract
Instrument Science Report STIS 97-07, 34 pages
Statistics
Hubble Space Telescope, Hst, Space Telescope Science Institute, Stis, Space Telescope Imaging Spectrograph
Scientific paper
A full set of flat field calibration files for the NUV MAMA has been generated from preflight laboratory data. An iterative technique with 12 passes through each raw flat data image is used to separate the illuminating lamp signature from the high frequency structure of the MAMA flat itself. The set of flats consists of one wavelength independent P-flat that corrects for the high frequency pixel-to-pixel sensitivity variations and 63 L-flats that correct for the lower frequency, wavelength dependent variations. The S/N of the counting statistics of the P-flat is over 300 per MAMA resolution element (2x2 lores pixels.) Onorbit tests are required to confirm the validity of the ground based flats for the reduction of flight data.
Bohlin Ralph Charles
Kaiser Mary Elizabeth
Lindler Don J.
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