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ASTSCRIPT-PSF-SELECT-STARS(1) User Commands ASTSCRIPT-PSF-SELECT-STARS(1) NAME astscript-psf-select-stars - Select good stars for constructing the PSF SYNOPSIS astscript-psf-select-stars [OPTIONS] image.fits DESCRIPTION Build a catalogue of "good stars" that will be considered for constructing an extended and non parametric PSF. Here, "good stars" means that they don't have close objects that affect it sourrondings and consequently they are not contaminated. The script will construct a catalog of stars from reference datasets (Gaia) if the user does not provide another one. In ad- dition to this, other parameters like the axis ratio are considered to fil- ter the sample and select only proper stars. astscript-psf-select-stars options: Input: -h, --hdu=STR/INT HDU/Extension name of number of the input file. -S, --segmented=STR Segmentation file obtained by Segment (astsegment). -D, --dataset=STR Query dataset ("gaia --dataset=edr3", etc.). -r, --racolumn=STR Right Ascension (R.A.) column name. -d, --deccolumn=STR Declination (Dec) column name. -f, --field=STR Magnitude column name ("phot_rp_mean_mag", for Gaia). -p, --parallaxanderrorcolumn=STR,STR The name of the parallax column. -m, --magnituderange=FLT,FLT The range of magnitude. -Q, --minaxisratio=FLT Minimum axis ratio to be accepted (default to 0.9). -M, --mindistdeg=FLT Minimum distance to more bright neighbor stars. to be accepted, in degrees. -c, --catalog=STR Catalog of stars containing: ra, dec, magnitude, parrallax, parral- lax_error. -a, --matchaperturedeg=FLT Aperture, in pixels, to match catalogue ra and dec coordinates with clumps' ra and dec. -F, --faintmagdiff The difference from the faintest star which the user will be deter- mined the faintest star in '--magnituderange' option. -b, --brightmag The limit for selecting wider range of bright stars. Output: -o, --output Output table with the object coordinates. -t, --tmpdir Directory to keep temporary files. -k, --keeptmp Keep temporal/auxiliar files. 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. Mandatory or optional arguments to long options are also mandatory or op- tional 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 (C) 2020-2025 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. SEE ALSO The full documentation for astscript-psf-select-stars is maintained as a Texinfo manual. If the info and astscript-psf-select-stars programs are properly installed at your site, the command info astscript-psf-select-stars should give you access to the complete manual. GNU Astronomy Utilities 0.24 November 2025 ASTSCRIPT-PSF-SELECT-STARS(1)
NAME | SYNOPSIS | DESCRIPTION | REPORTING BUGS | COPYRIGHT | SEE ALSO
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