GNU Astronomy Utilities 0.0 This is a pre-release version of GNU Astronomy Utilities (Gnuastro). It is versioned based on the reproduction pipeline of the first paper that defined the Gnuastro (Akhlaghi and Ichikawa, ApJS 220, 1. 2015). The reproduction pipeline has been submitted with the paper to arXiv (1505.01664) and is also present on Gitlab: https://gitlab.com/makhlaghi/NoiseChisel-paper/ This version will also be available in the tar.gz download page of Gnuastro for users who would want to reproduce those results. The fact that this version number was tied to the publication of that paper was only necessary for that first paper. Subsequent papers will use the released version numbers. About the tag format: --------------------- The main Gnuastro repository is hosted on Savannah using "cgit". cgit has a download link on the summary page. It will provide a .tar.gz tarball by suffixing the package name with the tag. So when the tag is in the format of X.X, or vX.X, then the tarball will be named `gnuastro-0.0.tar.gz'. This is the same tarball name from the FTP server. On the FTP server, the source code is bootstrapped and ready for configuration. But the tarball produced by cgit only contains the version controlled files. So having the same name can cause confusion. To avoid this problem, we have specified the tag format of `gnuastro_vX.X'. With this format, cgit's automatic tarball name generation apparently fails and so it just appends a `.tar.gz' to the tag name. So the final result will be `gnuastro_v0.0.tar.gz'. This is sufficiently different from the FTP format while also being clear in case (for some reason) someone wants to download cgit's tar.gz. And most importantly it will not cause any confusion.