scat Examples

Example 1. Search the HST GSC and send the results to standard output

Find the 10 brightest HST Guide Stars in a 1-degree square box centered on 10:00:00 +10:00:00 J2000 and sort them by right ascension.: scat -hsc gsc -n 10 -r -1800 -j 10:00:00 +10:00:00
produces the following: scat WCSTools 3.6.9, 2 July 2007, Doug Mink SAO GSC 10:00:00.000 +10:00:00.00 J2000 +- +00:30:27.8 +00:30:00.0 at epoch 2000.0000 10 / 246 HST Guide Stars (Mag brighter than 10.41) GSC_number RA2000 Dec2000 Mag Class Band N Arcsec 0829.0023 09:58:00.576 +09:41:40.96 8.94 0 1 1 2079.18 0832.0641 09:58:06.919 +10:21:35.35 10.41 3 1 1 2113.10 0832.0872 09:58:07.949 +10:01:53.87 9.64 3 1 1 1659.06 0832.1065 09:58:28.150 +10:02:51.25 9.78 0 1 1 1367.49 0832.0981 09:58:28.716 +10:25:28.34 9.19 0 1 1 2037.59 0832.0632 09:58:45.678 +10:27:31.17 7.09 0 1 2 1982.42 0832.0905 09:59:17.026 +10:10:03.58 9.78 0 1 1 875.84 0829.0042 10:00:05.035 +09:38:23.96 9.95 0 1 1 1298.17 0829.0193 10:01:42.744 +09:36:40.90 9.85 0 1 1 2064.89 0832.1200 10:01:46.783 +10:12:58.32 9.14 0 1 1 1758.51

Example 2. Search with results to a file

Find all USNO J Catalog Stars within 5 arcminutes of M51 and write results to a file: scat -wtc ujc -r 300 -o m51 -b 13:27:48.311 +47:27:28.98
produces the following in the file m51.ujc: catalog UJC ra 13:25:41.574 dec +47:43:00.03 radecsys fk4 equinox 1950.0000 epoch 1950.0000 radsec 300.00 catsort mag program scat WCSTools 3.6.9, 5 July 2007, Doug Mink SAO usnoj_id ra1950 dec1950 mag plate arcsec ------------ ------------ ------------ ----- ----- ------ 1350.1347999 13:23:43.030 +48:02:59.57 12.98 270 1691.44 1350.1347871 13:23:19.750 +48:01:23.17 14.37 220 1803.72 1350.1348001 13:23:43.205 +47:58:33.65 14.54 220 1513.78 1350.1348030 13:23:48.114 +47:58:33.73 15.10 270 1475.24 1350.1347811 13:23:09.846 +47:59:32.37 15.54 270 1821.26 1350.1348092 13:23:59.091 +47:58:52.13 15.89 220 1403.82

Example 3. Find closest star

Find the closest GSC II Star to 10:00:00 +10:00:00.: scat -hac gsc2 -j 10:00:00 +10:00:00
produces the following: scat WCSTools 3.6.9, 6 July 2007, Doug Mink SAO Find closest star GSC 2.3 10:00:00.000 +10:00:00.00 J2000 r= +00:02:00.0 at epoch 2000.0000 GSC2_id RA2000 Dec2000 MagF MagJ MagN MagB MagV Class Arcsec N6WQ007488 09:59:58.121 +10:00:12.93 19.90 99.90 19.00 99.90 99.90 3 30.62

Example 4. Match stars in input catalog

Match the stars in the input catalog test.tab to the USNO-A2.0 Catalog and list them one match per line.

scat -lc ua2 @test.tab

produces the following:

240020 22:15:54.555 -11:36:56.13  9.80  __  0750.21153376 22:15:54.521 -11:36:54.60 11.60 10.40 11   -0.49    1.53    1.61
267313 17:47:51.210 -22:58:17.35  9.10  A0  0600.28787484 17:47:51.194 -22:58:17.27  0.00  8.90 377   -0.22    0.08    0.24
196784 13:42:07.204 -09:06:40.06  8.60  K0  0750.08217430 13:42:07.153 -09:06:39.43  9.40  8.10 16   -0.76    0.63    0.99
127373 10:24:43.528 +11:21:21.15 10.20  K0  0975.06486656 10:24:43.519 +11:21:21.53 10.70  8.80 6   -0.13    0.38    0.40
095438 06:07:46.792 +23:28:44.76 10.30  K0  1125.03426401 06:07:46.859 +23:28:45.44 11.40  9.10 91    0.92    0.68    1.14

where the columns are input catalog star name, RA, Dec, magnitude, epoch, USNO-A2.0 region.number, RA, Dec, B magnitude, R magnitude, number of stars in the 120-arcsecond radius default search region, and catalog-search dra, ddec, and dr (in arcseconds).

Last updated 9 July 2007 by Doug Mink

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