Find the 10 brightest GSC-ACT stars in image
test.fts and sort them by right
ascension.
$ > imgsca -h -sn 10 test.fts
imgsca 2.9.4, 29 June 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/ACT Mag < 14.6
GSC number RA2000 Dec2000 Mag Class Band N X Y
4383.0924 09:54:15.067 +68:57:58.28 14.57 0 14 1 981.8 211.2
4383.0863 09:54:18.864 +69:02:38.62 12.34 0 12 1 950.0 606.2
4383.0434 09:54:31.764 +69:01:26.90 12.00 0 12 1 853.1 504.4
4383.0308 09:54:42.326 +69:05:52.87 11.86 0 11 1 770.9 878.9
4383.0613 09:54:45.408 +68:56:59.39 11.93 0 11 1 752.0 126.6
4383.0574 09:54:53.275 +69:03:48.35 14.50 0 14 1 689.2 702.9
4383.1127 09:55:02.078 +68:56:23.42 8.53 3 8 1 625.6 75.2
4383.0340 09:55:23.474 +69:00:49.46 14.59 0 14 1 461.8 449.7
4383.0928 09:55:41.422 +69:00:30.13 11.42 3 11 1 325.9 422.1
4383.0565 09:55:45.103 +69:01:45.84 12.33 3 12 1 297.8 528.8
where the columns are region.number, J2000 RA, J2000 Dec, magnitude
(V in north, B in south), object class (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, and the
To write a file
test.fts.gscact, use
imgsca -ws test.fts
[WCSTools]
[WCSTools programs]
[imcat]
[imgsca]