sact Examples

Example 1. Search with results to standard output

Find the 10 brightest ACT stars in a 1-degree box centered at 10:00:00 +10:00:00 and sort them by right ascension.: sact -s r -hn 10 -r -1800 10:00:00 +10:00:00 J2000
produces the following: sact WCSTools 3.6.9, 6 July 2007, Doug Mink SAO ACT 10:00:00.000 +10:00:00.00 J2000 +- +00:30:27.8 +00:30:00.0 at epoch 2000.0000 10 / 12 ACT Catalog Stars (MagB brighter than 11.77) ACT_number RA2000 Dec2000 MagB MagV Arcsec 0930.19286 09:58:00.597 +09:41:40.60 9.37 9.02 2079.11 0930.19612 09:58:28.100 +10:02:51.14 10.46 9.87 1368.21 0930.19617 09:58:28.737 +10:25:28.51 9.98 9.29 2037.51 0930.19830 09:58:45.687 +10:27:31.07 9.07 7.29 1982.27 0930.20165 09:59:17.053 +10:10:03.01 10.32 9.76 875.16 1000.00053 10:00:05.024 +09:38:23.39 11.77 10.26 1298.74 1000.00651 10:00:59.903 +09:40:43.75 11.21 10.54 1456.27 1000.00931 10:01:24.389 +10:04:24.69 11.63 10.96 1274.26 1000.01147 10:01:42.738 +09:36:40.37 11.26 10.09 2065.18 1000.01187 10:01:46.851 +10:12:57.36 9.84 9.24 1758.9

Example 2. Search with results to a file

Find all ACT stars within 1 degree of M51 and write results to a file: sact -wtr 3600 -o m51 13:27:48.311 +47:27:28.98 B1950
produces the following in the file m51.act: catalog ACT ra 13:27:48.311 dec +47:27:28.98 radecsys fk4 equinox 1950.0000 epoch 1950.0000 rpmunit mas/year dpmunit mas/year radsec 3600.00 catsort mag program sact WCSTools 3.6.9, 6 July 2007, Doug Mink SAO act_id ra1950 dec1950 magb magv pmra pmdec arcsec ---------- ------------ ------------ ----- ----- ------ ------ ------ 1330.01060 13:29:50.206 +47:29:28.30 7.33 7.08 28.9 -7.8 1241.61 1300.15262 13:26:55.868 +48:06:18.39 7.53 7.09 -48.5 3.7 2388.63 1300.15432 13:27:11.411 +46:37:43.41 8.67 8.20 -1.2 5.6 3009.30 1330.01799 13:31:08.231 +48:00:55.42 8.84 7.59 13.5 -43.5 2844.84 1300.14242 13:25:07.472 +48:15:39.65 9.88 8.51 -0.8 -39.1 3313.01 . . . 1300.13967 13:24:37.023 +47:53:19.19 12.17 10.75 3.7 -12.4 2477.08 1330.02074 13:31:38.224 +48:08:26.69 12.19 11.51 -21.1 13.6 3377.36 1300.13794 13:24:16.912 +46:57:24.88 12.26 11.55 -13.9 -1.1 2809.83 1330.00061 13:28:02.136 +47:59:43.90 12.85 10.78 -9.3 6.3 1939.95 1300.15528 13:27:25.126 +48:01:36.33 12.89 10.82 -1.9 -28.4 2060.67

Example 3. Find closest star

Find the closest USNO-SA2.0 star to 10:00:00 +30:00:00 J2000: sact -ha 10:00:00 +30:00:00 J2000
produces the following: sact WCSTools 3.6.9, 6 July 2007, Doug Mink SAO Find closest star ACT 10:00:00.000 +30:00:00.00 J2000 r= +00:30:00.0 at epoch 2000.0000 ACT_number RA2000 Dec2000 MagB MagV Arcsec 0930.20199 09:59:19.889 +30:00:27.48 10.45 9.93 521.76

Example 4. List selected stars from catalog

List ACT Reference Catalog stars 1200.00001 - 1200.00010: sact -s n -h 1200.00001-1200.00010x0.00001
produces the following: sact WCSTools 3.6.9, 6 July 2007, Doug Mink SAO ACT_number RA2000 Dec2000 MagB MagV 1200.00001 12:00:00.008 -02:37:51.55 11.36 10.87 1200.00002 12:00:00.221 -37:09:04.64 12.39 10.88 1200.00003 12:00:00.266 -58:00:06.94 11.77 10.45 1200.00004 12:00:00.273 -18:24:29.01 12.35 10.80 1200.00005 12:00:00.651 -70:49:43.17 11.28 10.90 1200.00006 12:00:00.783 -66:10:09.29 11.66 11.35 1200.00007 12:00:01.001 -26:43:47.45 12.18 11.33 1200.00008 12:00:01.017 -27:30:49.77 10.35 9.68 1200.00009 12:00:01.154 +43:20:37.01 9.98 8.64 1200.00010 12:00:01.308 -53:14:15.75 11.25 10.36

Example 5. Match stars in input catalog

Match the stars in the input catalog test.tab to the ACT Reference Catalog and list them one match per line.

sact -l @test.tab

produces the following:

240020 22:15:54.555 -11:36:56.13  9.80  __  2200.10527 22:15:54.555 -11:36:56.23 11.08 10.35   10.7  -30.3 11    -0.01    -0.10     0.10
267313 17:47:51.210 -22:58:17.35  9.10  A0  1730.14294 17:47:51.194 -22:58:17.27  9.21  8.86   -1.2  -11.2 22    -0.22     0.08     0.24
196784 13:42:07.204 -09:06:40.06  8.60  K0  1330.06726 13:42:07.203 -09:06:40.06  9.64  8.60   12.0  -13.0 14    -0.02    -0.00     0.02
127373 10:24:43.528 +11:21:21.15 10.20  K0  1000.16460 10:24:43.507 +11:21:21.52 10.91  9.54   -7.5   -8.5 11    -0.31     0.37     0.48
095438 06:07:46.792 +23:28:44.76 10.30  K0  0600.06193 06:07:46.841 +23:28:44.96 10.44  9.38   -2.1   -1.8 33     0.67     0.20     0.70

where the columns are input catalog star name, RA, Dec, magnitude, spectral type, Guide Star region.number, RA, Dec, B magnitude, V magnitude, RA proper motion, Dec proper motion, number of stars in the 1800-arcsec-radius default search radius, and catalog-search dra, ddec, and dr (in arcseconds).