imstar(1)
Find stars in FITS and IRAF image files
Synopsis
imstar [options] [FITS or IRAF filename] or [@file of image file names]
Description
Options
- <hh:mm:ss> <dd:mm:ss> [J2000, B1950]
-
Coordinates for center (or reference pixel if -x is used).
- -a <angle>
-
Image rotation angle in degrees (default 0). If multiple of 90, rotate
image before search and set WCS angle to zero; if not, put in WCS.
- -b
-
Output B1950 (FK4) coordinates (default=image equinox)
- -d <catalog name>
-
Read this DAOFIND style catalog of X, Y, and magnitude instead of searching
for stars in the image. The format is simply white-space-separated numbers
on a line, with # at the beginning of comment lines.
- -e <num>
-
Number of pixels to ignore around image edge
- -f
-
Write a simple ASCII catalog file instead of tab table or DAOFIND format
(number RA DEC mag ... per line, with two lines of header info)
- -h
-
Print heading, else do not
- -i <num>
-
Minimum peak value for star in image (<0=-sigma)
Setting this to reject all but 10-15 stars is a good way to speed up the
star-finding process. If num is less than zero, the minimum peak is -num
image pixel standard deviations. Setting this number rejects faint stars
early in the selection process for a significant saving in computing time.
- -j
-
Output J2000 (FK5) coordinates (default=image equinox)
- -k
-
Print each star as it is found for debugging
- -l
-
Reflect the image left <-> right before rotating (-a) and searching for stars.
- -m <magnitude>
-
Magnitude offset
- -n
-
Number of brightest stars to print
- -o
-
Output star list in DAOFIND format.
The first three numbers on each line of the
output file are X, Y, and magnitude, separated by one or more blanks or
a tab. Lines beginning with # are ignored.
- -p <num>
-
Plate scale in arcsec per pixel (default 0)
- -q <c|d|o|s|x|v|+>
-
Output region file shape for SAOimage (default o)
Characters mean: c>ross, d>iamond, s>quare, o>circle, x=X, v>ary with GSC
type, +>cross.
- -r
-
Maximum radius for star in pixels
- -s
-
Sort by RA instead of flux
- -t
-
Output in Starbase tab table format
- -v
-
Verbose listing of processing intermediate results
- -w
-
Write output to a file in addition to standard out.
If DAO format (-o), create the name by adding .dao to the image file name.
If Starbase format (-t), create the name by adding .tab to the image file name.
If ASCII format (-f), create the name by adding .stars to the image file name.
- -x <X> <Y>
-
X and Y coordinates of reference pixel (if not in header or image center)
- -z
-
Use AIPS classic projection code (for "-SIN", "-TAN", "-ARC", "-NCP",
"-GLS", "-MER", "-AIT" and "-STG" only) instead of WCSLIB proposed
standard projection code.
