This SAOimage display shows the alignment of
USNO-B1.0 Stars with a test image after a
world coordinate system has been fit. The coordinates plotted are based
on header keywords describing a plane-tangent system fit by matching HST
Guide stars and sources found in the image.
This image was produced by a one-line Unix shell script for this task,
saoimage -reg `imub1 -q o -r 10 $1` -wcscom sub1_-ha_%s $1where the argument to the task is the name of the file to be displayed.
The immatch program will provide a list of the stars in the image which match catalog stars.
|Click on the image for full-screen view|
imub1 finds all of the
USNO-B1.0 Stars in the image based on
the world coordinate system parameters in its header and writes them to the
region file testx90mw.fits.ub1,
seen on the right.
The name of this file is sent to standard output which the backquotes give to SAOimage as a command line argument following the -reg command.
# USNO-B1.0 Catalog (10" radius) CIRCLE(527,446,16) # ub1 1214.0243793 CIRCLE(661,661,16) # ub1 1214.0243761 CIRCLE(960,978,16) # ub1 1215.0243433 CIRCLE(529,33,16) # ub1 1213.0243493 CIRCLE(738,763,16) # ub1 1214.0243749 . . . CIRCLE(991,539,16) # ub1 1214.0243704 CIRCLE(290,966,16) # ub1 1214.0243846 CIRCLE(562,450,16) # ub1 1214.0243777 CIRCLE(555,448,16) # ub1 1214.0243781 CIRCLE(541,444,16) # ub1 1214.0243788
sub1 3.3.0, 28 January 2003, Doug Mink SAO Find closest star ub1 16:15:56.357 +31:24:24.82 J2000 r= 120.00 at epoch 2000.00 USNO_B1_number RA2000 Dec2000 MagB1 MagR1 MagB2 MagR2 MagN PM NI Arcsec 1214.0243793 16:15:56.126 +31:24:24.15 11.71 10.79 10.76 10.53 10.49 0 5 3.03