dfits - display FITS file header information
[-x xtnum] <list>
[-x xtnum] -
displays FITS header informations on stdout. Header information can
be found in the main header only (default), in extensions, or in both. See the
-x option below. dfits
accepts multi-file input. 'dfits -'
expects single file data coming from stdin. dfits
also accepts now
'HDR' files. These are identified from the fact that they contain a line feed
in one of the 80 first characters.
- -x xtnum
- Specifies the extension to print out. Extensions are
numbered starting from 1. If this option is not specified, only the main
header is printed out. If this option specifies an extension that does not
exist, nothing is printed out.
Specify 0 as extension number to get a print of the main header plus all
*.fits | grep NAXIS3
gzip -d < star.fits.gz | dfits -
-x 0 *.fits
-x 3 *.fits
can be combined with dfits
output to sort out keyword
values of a group of FITS files.
Files shall all comply with FITS format