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1990-08-01
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These images are provided as samples of the non-stellar objects
listed in the Revised New General Catalogue of Nonstellar
Astronomical Objects (RNGC). The images here were drawn from a
collection of digitized plates at the Space Telescope Science
Institute, Baltimore, MD. The source for these images was the
Guide Star Catalog (GSC). The GSC is partially based on data
obtained at the Palomar Observatory, operated by the California
Institute of Technology; at the U.K. Schmidt Telescope, operated by
the U.K. Science and Engineering Research Council and by the Anglo-
Australian Observatory; at the Cerro Tololo Inter-American
Observatory and the Sacramento Peak Observatory, both operated by
the Association for Research in Astronomy, Inc., under contract to
the National Science Foundation; and at the Mount Lemmon
Observatory, operated by the University of Arizona.