astfits - Man Page
view and manipulate FITS headers
Synopsis
astfits [OPTION...] ASTRdata
Description
Fits is part of GNU Astronomy Utilities 0.23. Fits allows you to view and manipulate (add, delete, or modify) FITS extensions (or HDUs) and FITS header keywords within one extension.
For more information, please run any of the following commands. In particular the second contains a very comprehensive explanation of Fits's invocation: expected input(s), output(s), and a full description of all the options.
- All options and their values:
$ astfits -P
- Inputs/Outputs and options:
$ info astfits
- Full section in manual/book:
$ info Fits
- 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
Fits options:
Input:
- --arguments=STR
Plain-text file with command-line arguments.
- -h, --hdu=STR/INT
Extension name or number of input data.
Output:
- -K, --keepinputdir
Keep input directory for automatic output.
- --outfitsnocommit
No Git commit in 0-th HDU of output FITS.
- --outfitsnoconfig
No metadata in 0-th HDU of output FITS.
- --outfitsnodate
No 'DATE' in 0-th HDU of output FITS.
- --outfitsnoversions
No versions in 0-th HDU of output FITS.
- --outhdu=STR
HDU/extension in output for --copykeys.
- -o, --output=STR
Output file name (not for keywords).
- -O, --colinfoinstdout
Column info/metadata when printing to stdout.
- --tableformat=STR
Table fmt: 'fits-ascii', 'fits-binary', 'txt'.
- -T, --type=STR
Type of output: e.g., int16, float32, etc...
HDU (extension) information:
- --datasum
Calculate HDU's datasum and print in stdout.
- --datasum-encoded
16 character string encoding of '--datasum'.
- --hasimagehdu
File has at least one image HDU.
- --hastablehdu
File has at least one table HDU.
- --listallhdus
List all HDUs within the file.
- --listimagehdus
List all image HDUs within the file.
- --listtablehdus
List all table HDUs within the file.
- -n, --numhdus
Print number of HDUs in the given FITS file.
- --pixelareaarcsec2
Pixel area in arc-seconds squared.
- --pixelscale
Return the pixel-scale of the HDU's WCS.
- --skycoverage
Image coverage in the WCS coordinates.
HDU (extension) manipulation:
- -C, --copy=STR/INT
Copy extension to output file.
- -k, --cut=STR/INT
Copy extension to output and remove from input.
- --primaryimghdu
Copy/cut image HDUs to primary/zero-th HDU.
- -R, --remove=STR/INT
Remove extension from input file.
Keywords (in one HDU):
- -a, --asis=STR
Write value as-is (may corrupt FITS file).
- --copykeys=INT:INT/STR,STR
Range/Names of keywords to copy in output.
- -c, --comment=STR
Add COMMENT keyword, any length is ok.
- -d, --delete=STR
Delete a keyword from the header.
- -H, --history=STR
Add HISTORY keyword, any length is ok.
- -l, --keyvalue=STR[,STR,...]
Only print the value of requested keyword(s).
- --printkeynames
Print all keyword names.
- -p, --printallkeys
Print all keywords in the selected HDU.
- -r, --rename=STR,STR
Rename keyword, keeping value and comments.
- -s, --datetosec=STR
FITS date to sec from 1970/01/01T00:00:00
- -t, --date
Set the DATE keyword to the current time.
- -u, --update=STR,STR
Update a keyword value or comments.
- -v, --verify
Verify the CHECKSUM and DATASUM keywords.
- --wcscoordsys=STR
Convert WCS coordinate system.
- --wcsdistortion=STR
Convert WCS distortion to another type.
- -w, --write=STR
Write a keyword (with value, comments and units).
Meta-image creation:
- --edgesampling=INT
Number of extra samplings in pixel sides.
- --pixelareaonwcs
Image where pixels show their area in sky (WCS).
Operating modes:
- -?, --help
give this help list
- --checkconfig
List all config files and variables read.
- --cite
BibTeX citation for this program.
- --config=STR
Read configuration file STR immediately.
- --config-prefix=STR
Custom prefix of option names config files.
- --lastconfig
Do not parse any more configuration files.
- --minmapsize=INT
Min. bytes to avoid RAM automatically.
- --onlyversion=STR
Only run if the program version is STR.
- -P, --printparams
Print parameter values to be used and abort.
- --quietmmap
Don't print mmap'd file's name and size.
- -q, --quiet
Only report errors, remain quiet about steps.
- -Q, --quitonerror
Quit if there is an error on any action.
- -S, --setdirconf
Set default values for this directory and abort.
- --usage
give a short usage message
- -U, --setusrconf
Set default values for this user and abort.
- -V, --version
print program version
Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options.
GNU Astronomy Utilities home page: http://www.gnu.org/software/gnuastro/
Reporting Bugs
Report bugs to bug-gnuastro@gnu.org.
Copyright
Copyright © 2015-2024 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 Mohammad Akhlaghi
See Also
The full documentation for Fits is maintained as a Texinfo manual. If the info and Fits programs are properly installed at your site, the command
info Fits
should give you access to the complete manual.