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GNU Astronomy Utilities


The GNU Astronomy Utilities (Gnuastro) is an official GNU package consisting of various programs and library functions for the manipulation and analysis of astronomical data. All the programs share the same basic command-line user interface for the comfort of both the users and developers. Gnuastro is written to comply fully with the GNU coding standards so it integrates finely with the GNU/Linux operating system. This also enables astronomers to expect a fully familiar experience in the source code, building, installing and command-line user interaction that they have seen in all the other GNU software that they use.

In case you are new to Gnuastro, you might find these links useful:


The current stable release is Gnuastro 0.3 (June 1st, 2017). Use a mirror if possible.
New releases are announced in info-gnuastro. To stay up to date, please subscribe.

For details of the significant changes please see the NEWS file.

The canonical http://ftp.gnu.org/gnu/gnuastro/gnuastro-latest.tar.gz will always contain the most recent Gnuastro release. Use the mirror link (http://ftpmirror.gnu.org/gnuastro/gnuastro-latest.tar.gz) if possible.

Previous versions and PGP signatures are always available at http://ftp.gnu.org/gnu/gnuastro. Use a mirror if possible.


See Quick start for a fast review of the Gnuastro's building and installation commands.

Gnuastro only has three mandatory dependencies: GNU Scientific Library, CFITSIO, WCSLIB.

For a more detailed description, see the Installation chapter of the Gnuastro book. It thoroughly discusses the dependencies, downloading methods, and the building and installation of Gnuastro.

Gnuastro book (documentation)

The Gnuastro book (official Gnuastro documentation or manual) is available online in various formats, as is documentation for most GNU software. After installation, you can access the complete book, or the sections related to individual programs and library headers on the command-line (in Info format). See Getting help for more. As a summary, here are the ways you can immediately find navigate to any major part of the book on the command-line:

Gnuastro mailing lists

Gnuastro has the following mailing lists:

Security reports that should not be made immediately public can be sent directly to the maintainer. If there is no response to an urgent issue, you can escalate to the general security mailing list for advice.

Report a bug

The Report a bug section of the manual thoroughly explains the process to report a bug, please read that section. As a summary, first have a look at the Gnuastro bug archive. Click on the "Display criteria" (above the list), choose "Any" in the "Open/Closed" drop-down menu, and under "Category" choose the part of Gnuastro that corresponds to your bug. By clicking on the "Apply" button, only the relevant bugs will be listed. Green items have been solved and closed, while red items are still open. If your bug isn't listed, please take one of the following steps. Please try to be as descriptive as possible and include the Gnuastro version you are using along with the commands or code that created the bug so we can reproduce and thus fix it faster.

Getting involved

The most important principle behind Gnuastro is to be easy for anyone to hack into it (add a new feature, change an existing one, fix a problem and most importantly to understand what is going on under the hood), please see Science and its tools. So you are most welcome and highly encouraged to contribute. There is even a full chapter dedicated to Developing to make it as easy as possible for you to get involved. Also see How to help GNU for joining the full GNU project.

Test releases
Trying the latest test release (when available) is always appreciated. Test releases of Gnuastro can be found at http://alpha.gnu.org/gnu/gnuastro/ (via HTTP) and ftp://alpha.gnu.org/gnu/gnuastro/ (via FTP).
Gnuastro is still under active development. So if you are interested, please have a look at the Developing chapter of the documentation and start hacking into Gnuastro or even write your own program within it (Gnuastro has a template to help you). For development sources, bug trackers, task trackers (planned features to be added), and other information, please see the Gnuastro project page at savannah.gnu.org. The trackers can be a good starting point if you want to get involved in the coding. To stay up to date with Gnuastro's development activities, please subscribe to the gnuastro-devel, and/or the gnuastro-commits mailing lists.
Gnuastro is version controlled using Git. The version controlled source can be inspected online, or you can see the latest history. To keep a local copy, please clone it onto your system with any one of the following commands (if it works, the first one is recommended).
git clone git://git.sv.gnu.org/gnuastro
git clone http://git.sv.gnu.org/r/gnuastro.git
To configure and build the version controlled source, you will need to bootstrap it (also see bootstrapping dependencies). See the forking tutorial for a demonstration of the Gnuastro project workflow.
Gnuastro was created and is currently maintained by Mohammad Akhlaghi <akhlaghi::at::gnu.org>. Please use the mailing lists for contact.


GNU Astronomy Utilities (Gnuastro) is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.


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