Query the USNO B1.0 catalog using ubcone. This bash script allows the user to specify a sky position (RA,Dec) and search radius. A limiting R2 (Second Epoch Red magnitude) magnitude is the final query argument.
arg1 - Ra center (floating point in HOURS) arg2 - Dec center (floating point in DEGREES) arg3 - search radius in degrees (0.2) arg4 - R2 faint magnitude limit. Sample Usage: % ubc01 11.2337736 +44.3347747 0.2 19.5The output is sent to a file named "UBC01_usnob.asc". This is a MEDIUM format ubcone query file. For more details on ubcone READ HERE. The output of ubc01 can be reduced and simplified with a python code like usno_00.py:
% usno_00.py UBC01_usnob.asc > temp1.cdfp
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