Dust Motes and Blemishes in the CCD Spectral Modes

Details Dust Motes and Blemishes in the CCD Spectral Modes Dust Motes and Blemishes in the CCD Spectral Modes

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999stis.rept....4b&link_type=abstract

STIS Instrument Science Report 99-04, 10 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute, Stis, Space Telescope Imaging Spectrograph

Scientific paper

A set of 84 dust mote features and blemishes have been identified in STIS CCD flat fields. These 84 regions are flagged in the bad pixel table and will be propagated to extracted spectra. The current defaults place the spectra at the Y center of the CCD, where two motes can cause spurious spectral features. Since flat field correction of the dust motes is inadequate for spectra of point sources, these artifacts can be up to 3% deep with a width of several pixels after flat field correction. Several Figures are included as guides to placing spectra onto regions of the CCD where blemishes have minimal impact.

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