NAME

       astscript-zeropoint - Estimate zero point of an image

SYNOPSIS

       astscript-zeropoint [OPTIONS] image.fits

DESCRIPTION

       Calculate the Zeropoint of the image based on a reference images or catalog.

   astscript-zeropoint options:
              Input(s):

       -h, --hdu=STR/INT
              HDU/Extension name or number of input.

       -S, --starcat=STR
              Catalog with positions for aperture photomery.

       --starcathdu=STR/INT
              HDU of table in '--starcat'.

       --starcatra=STR/INT
              Column in '--starcat' that contains RA.

       --starcatdec=STR/INT
              Column in '--starcat' that contains DEC.

       --mksrc=STR
              Makefile (for developers when debugging).

              Output:

       -o, --output
              Output file name.

       -t, --tmpdir
              Directory to keep temporary files.

       -k, --keeptmp
              Keep temporal/auxiliar files.

       -K, --keepzpap
              Keep each aperture's zp in a different HDU.

              General settings

       -a, --aperarcsec=FLT[,FLT]
              Aperture radius (in arc-seconds) for photometry.

       -M, --magnituderange=FLT,FLT Range of the magnitude to be considered.

              Reference catalog mode

       -c, --refcat=STR
              Reference catalog file name.

       -C, --refcathdu=STR/INT
              Reference catalog HDU name of number.

       -r, --refcatra=STR
              Reference catalog Right Ascension (R.A.) column.

       -d, --refcatdec=STR
              Reference catalog Declination (Dec) column.

       -m, --refcatmag=STR
              Reference catalog Magnitude column.

       -s, --matchradius=FLT
              Radius (arcsec) to match stars and ref. catalog.

              Reference image mode

       -R, --refimgs=STR[,STR]
              Reference image name(s) with known zeropoint.

       -H, --refimgshdu=STR/INT
              Reference image HDU name(s) or number (s).

       -z, --refimgszp=FLT[,FLT]
              Zero point(s) of the reference image(s).

              Operating mode:

       -h, --help
              Print this help.

       --cite BibTeX citation for this program.

       -q, --quiet
              Don't print any extra information in stdout.

       -V, --version
              Print program version.

       -N, --numthreads=INT
              Number of threads; maximum if not given.

       Mandatory  or  optional  arguments  to  long options are also mandatory or optional for any corresponfing
       short options.

       GNU Astronomy Utilities home page: http://www.gnu.org/software/gnuastro/

REPORTING BUGS

       Report bugs to bug-gnuastro@gnu.org

COPYRIGHT

       Copyright © 2022-2024 Free Software Foundation, Inc.  License GPLv3+: GNU General public license  version
       3 or later.
       This  is  free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent
       permitted by law.

       Written/developed by Sepideh Eskandarlou et al.

SEE ALSO

       The full documentation for astscript-zeropoint is maintained as  a  Texinfo  manual.   If  the  info  and
       astscript-zeropoint programs are properly installed at your site, the command

              info astscript-zeropoint

       should give you access to the complete manual.

GNU Astronomy Utilities 0.23                        July 2024                             ASTSCRIPT-ZEROPOINT(1)