Use imua1 to
list the 10 Brightest
USNO-A1.0 Stars in an
Image
Find the 10 brightest USNO-A1.0 Stars in image
test.fts and sort them by right
ascension.
$ > imua1 -h -sn 10 test.fts
imua1 2.5, 8 December 1998, Doug Mink, SAO
test.fts: RA: 09:54:09.518 - 09:56:24.378 J2000
test.fts: Dec: +68:55:30.78 - +69:07:34.87 J2000
10 USNO A-1.0 Catalog Stars at 1995.80 in FITS image test.fts
USNO A1 number RA2000 Dec2000 MagB MagR X Y Plate Arcsec
1575.03068435 09:54:42.494 +69:05:52.90 0.0 11.9 769.7 879.0 0 318.98
1575.03068527 09:54:45.601 +68:56:59.04 12.2 11.4 750.5 126.1 38 321.53
1575.03069012 09:55:02.246 +68:56:23.53 0.0 8.5 624.3 75.3 0 319.24
1575.03069016 09:55:02.397 +68:56:24.33 9.4 8.5 623.1 76.5 38 318.27
1575.03069022 09:55:02.582 +68:56:24.58 9.5 8.9 621.7 76.8 38 317.78
1575.03070049 09:55:34.811 +69:07:33.10 18.5 8.6 374.6 1018.6 38 372.77
1575.03070453 09:55:47.277 +68:59:25.52 17.1 9.0 281.7 330.9 38 206.80
1575.03070866 09:56:01.776 +68:59:19.62 21.0 11.4 171.7 322.5 38 275.27
1575.03070935 09:56:03.827 +68:59:07.36 19.5 10.4 156.2 305.2 38 290.92
1575.03071052 09:56:07.413 +69:01:58.24 20.2 11.4 128.9 546.1 38 272.11
where the columns are region.number, J2000 RA, J2000 Dec, B and R magnitudes
image X and Y pixel coordinates computed using the
image world coordinate system,
the plate, unless from a catalog, and the distance in arcseconds from the center
of the image. To write a file
test.fts.ua1, use
imua1 -w -n 10 test.fts
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