astscript-psf-scale-factor - Man Page

Find factor to scale PSF to a given star

Synopsis

astscript-psf-scale-factor [OPTION] FITS-files

Description

This script is part of GNU Astronomy Utilities 0.23.

This script will consider a center position and then compute the factor by which it is necessary to multiply the specified PSF image in order to match it with the object at the center (within a ring radii). The main idea is to have the necessary factor that will be used to allocate the PSF with the proper flux value for constructing the scattered light field.

For more information, please run any of the following commands. In particular the first contains a very comprehensive explanation of this script's invocation: expected input(s), output(s), and a full description of all the options.

Inputs/Outputs and options:: $ info astscript-psf-scale-factor
Full Gnuastro manual/book:: $ info gnuastro

If you couldn't find your answer in the manual, you can get direct help from experienced Gnuastro users and developers. For more information, please run:

$ info help-gnuastro

astscript-psf-scale-factor options

Input:

-h, --hdu=STR: HDU/extension of all input FITS files.
-p, --psf=STR: PSF image fits file.
-P, --psfhdu=STR: HDU/extension of the PSF image.
-O, --mode=STR: Coordinates mode ('wcs' or 'img').
-c, --center=FLT,FLT: Center coordinates of the object.

-W, --widthinpix=INT,INT Width of the stamp in pixels.

-n, --normradii=INT,INT Minimum and maximum radii (in pixels): for computing the scaling factor value.
-S, --segment=STR: Output of Segment (with OBJECTS and CLUMPS).

-s, --sigmaclip=FLT,FLT Sigma-clip multiple and tolerance.

-d, --nocentering

Do not do the sub-pixel centering to new pix grid.

Output:

-t, --tmpdir

Directory to keep temporary files.

-k, --keeptmp

Keep temporal/auxiliar files.

Operating mode:

-?, --help