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sgsca
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sgsca
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By default, only the brightest 100 objects (or closest 100, if the -s p option is used) are returned. Use the -n option to increase this number.
As of version 2.9.4, the bandpass and number of entries for a star are printed in addition to the object class. Type scat band to get a listing of the band codes and their meanings.
Output is to standard out, unless the -w flag is set, in which case it goes to objectname.gscact or search.gscact. It is somewhat similar to RGSC, which can search from lists of coordinates but cannot sort the output.
Set the environment variable GSCA_NORTH to the directory containing the northern hemisphere CDROM and GSCA_SOUTH to the directory containing the southern hemisphere CDROM. The default directories are set in cdna and cdsa near the start of libwcs/gscread.c. Set GSCA_NORTH to a URL to read the GSC-ACT over the world wide web.
[ Search the USNO-A2.0 Catalog using this software]
