Matching GSC-ACT stars in an image using IMMGSCA

After running SExtractor on a test image, creating the file testx90mw.sex, we can match catalog stars to stars in an image containing a world coordinate system.

$ immgsca -d testx90mw.sex testx90mw.fits

returns

# Arcsec/Pixel= -0.644772 0.643577  Rotation= -0.217214 degrees
# Optical axis= 16:15:56.745  +31:25:06.83 J2000 x= 514.55 y= 512.29
# Optical axis= 16:13:59.641  +31:32:30.02 B1950  x= 514.55 y= 512.29
# nmatch= 14 nstars= 13 between gscact and testx90mw.sex  niter= 0
 2580.1696 16:15:49.366 +31:26:42.22 13.38  660.8  661.0  -0.50  -0.46   0.68
 2580.1207 16:15:45.538 +31:27:48.46 13.50  736.9  763.5  -0.66  -0.22   0.70
 2580.1403 16:15:34.356 +31:30:06.52 13.59  959.8  978.1  -0.38  -0.45   0.59
 2580.2291 16:16:08.374 +31:26:15.58 13.81  283.5  620.2  -0.41  -0.42   0.59
 2580.1629 16:15:55.922 +31:19:58.19 13.91  528.7   33.3  -0.22  -0.36   0.42
 2580.1158 16:16:12.168 +31:28:53.83 13.99  209.3  861.3  -0.35   2.76   2.79
 2580.1798 16:15:34.894 +31:24:43.27 14.16  947.7  475.6  -0.33  -0.26   0.42
 2580.1710 16:15:56.110 +31:24:24.26 14.13  524.9  446.9  -1.31  -0.50   1.40
 2580.1909 16:15:37.308 +31:23:51.79 14.76  899.6  395.9  -0.33  -0.45   0.56
 2580.1943 16:15:41.503 +31:26:37.36 14.84  817.0  653.3  -0.37  -0.47   0.60
 2580.1485 16:15:52.985 +31:25:15.38 14.88  588.7  526.4  -0.35  -0.59   0.69
 2580.2147 16:16:21.103 +31:29:28.64 14.47   30.1  921.5  -1.77  -0.91   1.99
 2580.1878 16:16:10.982 +31:21:42.19 14.92  229.6  196.1  -0.58  -0.78   0.97
 2580.2147 16:16:21.103 +31:29:28.64 14.47   37.6  922.6   3.02  -1.58   3.41
# Mean  dx= 0.5029/1.7214  dy= -0.5198/1.5782  dxy= 1.7521
# Mean dra= -0.3255/1.1092  ddec= -0.3342/1.0162 sep= 1.1291/1.5043

[immatch] [imgsca] [imgsca example 3]