Use imgsc to List the 10 Brightest HST Guide Stars in an Image

Find the 10 brightest HST Guide Stars in image test.fts (header) (image) and sort them by right ascension.
$ imgsc -hsn 10 test.fts
returns
imgsc 2.9.4, 2 July 2001, Doug Mink (dmink@cfa.harvard.edu)
test.fts: RA:  09:54:09.518 - 09:56:24.378 J2000
          Dec: +68:55:30.78 - +69:07:34.87 J2000
10 / 14 HST Guide Stars Mag < 14.6
GSC number  RA2000       Dec2000      Mag  Class Band N    X       Y   
4383.0924 09:54:15.245 +68:57:58.32  14.57    0   14  1   980.5   211.2
4383.0863 09:54:19.037 +69:02:38.62  12.34    0   12  1   948.7   606.2
4383.0434 09:54:31.937 +69:01:26.94  12.00    0   12  1   851.8   504.4
4383.0308 09:54:42.494 +69:05:52.91  11.86    0   11  1   769.7   879.0
4383.0613 09:54:45.578 +68:56:59.46  11.93    0   11  1   750.7   126.7
4383.0574 09:54:53.443 +69:03:48.38  14.50    0   14  1   688.0   702.9
4383.1127 09:55:02.246 +68:56:23.53   8.53    3    8  1   624.3    75.3
4383.0340 09:55:23.638 +69:00:49.57  14.59    0   14  1   460.5   449.8
4383.0928 09:55:41.580 +69:00:30.28  11.42    3   11  1   324.7   422.3
4383.0565 09:55:45.262 +69:01:45.95  12.33    3   12  1   296.6   528.9
where the columns are region.number, J2000 RA, J2000 Dec, magnitude (V in north, B in south), object type (0=star, 3=nonstar), bandpass, number of catalog entries for this source, and image X and Y pixel coordinates computed using the image world coordinate system. To write a file test.fts.gsc, use
imgsc -ws test.fts

Last updated 5 July 2007 by Doug Mink

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