Schmidt Plate Archive & Scanning Facility

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Last Updated Jan 2001

Copyright 2001 The Association of Universities for Research in Astronomy, Inc. All Rights Reserved.

CASB maintains an archive of several thousand Schmidt survey plates in a secure, environmentally controlled plate vault. Original plates of the POSS-II and SES surveys pass through our facility for digitization on one of our two GAMMA scanning machines. These machines, which started life in 1983 as standard Perkin-Elmer PDS 2020G microdensitometers, were modified in the early 1990s for multichannel operation. Each can automatically scan an entire Schmidt plate at 1 arcsecond resolution in less than seven hours.