.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.49.3.
.TH ASTSCRIPT-ZEROPOINT "1" "February 2024" "GNU Astronomy Utilities 0.22" "User Commands"
.SH NAME
astscript-zeropoint \- Estimate zero point of an image
.SH SYNOPSIS
.B astscript-zeropoint
[\fI\,OPTIONS\/\fR] \fI\,image.fits\/\fR
.SH DESCRIPTION
Calculate the Zeropoint of the image based on a reference images or
catalog.
.SS "astscript-zeropoint options:"
.IP
Input(s):
.TP
\fB\-h\fR, \fB\-\-hdu\fR=\fI\,STR\/\fR/INT
HDU/Extension name or number of input.
.TP
\fB\-S\fR, \fB\-\-starcat\fR=\fI\,STR\/\fR
Catalog with positions for aperture photomery.
.TP
\fB\-\-starcathdu\fR=\fI\,STR\/\fR/INT
HDU of table in '\-\-starcat'.
.TP
\fB\-\-starcatra\fR=\fI\,STR\/\fR/INT
Column in '\-\-starcat' that contains RA.
.TP
\fB\-\-starcatdec\fR=\fI\,STR\/\fR/INT
Column in '\-\-starcat' that contains DEC.
.TP
\fB\-\-mksrc\fR=\fI\,STR\/\fR
Makefile (for developers when debugging).
.IP
Output:
.TP
\fB\-o\fR, \fB\-\-output\fR
Output file name.
.TP
\fB\-t\fR, \fB\-\-tmpdir\fR
Directory to keep temporary files.
.TP
\fB\-k\fR, \fB\-\-keeptmp\fR
Keep temporal/auxiliar files.
.TP
\fB\-K\fR, \fB\-\-keepzpap\fR
Keep each aperture's zp in a different HDU.
.IP
General settings
.TP
\fB\-a\fR, \fB\-\-aperarcsec\fR=\fI\,FLT[\/\fR,FLT]
Aperture radius (in arc\-seconds) for photometry.
.HP
\fB\-M\fR, \fB\-\-magnituderange\fR=\fI\,FLT\/\fR,FLT Range of the magnitude to be considered.
.IP
Reference catalog mode
.TP
\fB\-c\fR, \fB\-\-refcat\fR=\fI\,STR\/\fR
Reference catalog file name.
.TP
\fB\-C\fR, \fB\-\-refcathdu\fR=\fI\,STR\/\fR/INT
Reference catalog HDU name of number.
.TP
\fB\-r\fR, \fB\-\-refcatra\fR=\fI\,STR\/\fR
Reference catalog Right Ascension (R.A.) column.
.TP
\fB\-d\fR, \fB\-\-refcatdec\fR=\fI\,STR\/\fR
Reference catalog Declination (Dec) column.
.TP
\fB\-m\fR, \fB\-\-refcatmag\fR=\fI\,STR\/\fR
Reference catalog Magnitude column.
.TP
\fB\-s\fR, \fB\-\-matchradius\fR=\fI\,FLT\/\fR
Radius (arcsec) to match stars and ref. catalog.
.IP
Reference image mode
.TP
\fB\-R\fR, \fB\-\-refimgs\fR=\fI\,STR[\/\fR,STR]
Reference image name(s) with known zeropoint.
.TP
\fB\-H\fR, \fB\-\-refimgshdu\fR=\fI\,STR\/\fR/INT
Reference image HDU name(s) or number (s).
.TP
\fB\-z\fR, \fB\-\-refimgszp\fR=\fI\,FLT[\/\fR,FLT]
Zero point(s) of the reference image(s).
.IP
Operating mode:
.TP
\fB\-h\fR, \fB\-\-help\fR
Print this help.
.TP
\fB\-\-cite\fR
BibTeX citation for this program.
.TP
\fB\-q\fR, \fB\-\-quiet\fR
Don't print any extra information in stdout.
.TP
\fB\-V\fR, \fB\-\-version\fR
Print program version.
.TP
\fB\-N\fR, \fB\-\-numthreads\fR=\fI\,INT\/\fR
Number of threads; maximum if not given.
.PP
Mandatory or optional arguments to long options are also mandatory or optional
for any corresponfing short options.
.PP
GNU Astronomy Utilities home page: http://www.gnu.org/software/gnuastro/
.SH "REPORTING BUGS"
Report bugs to bug\-gnuastro@gnu.org
.SH COPYRIGHT
Copyright \(co 2022\-2024 Free Software Foundation, Inc.
License GPLv3+: GNU General public license version 3 or later.
.br
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
.PP
Written/developed by Sepideh Eskandarlou et al.
.SH "SEE ALSO"
The full documentation for
.B astscript-zeropoint
is maintained as a Texinfo manual.  If the
.B info
and
.B astscript-zeropoint
programs are properly installed at your site, the command
.IP
.B info astscript-zeropoint
.PP
should give you access to the complete manual.