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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