Tar files containing the latest source code release are available from:GPG public key.
The development version is available from a Git source code repository:
git clone http://space.mit.edu/cxc/isis/isis.git
To update your local copy of this repository, just type 'git pull'.
ISIS is written in standard C and Fortran and is intended to be portable across most variants of Unix. It has been used on both 32-bit and 64-bit CPUs and on several versions of Linux, Mac OS X (PowerPC and Intel), Windows (Cygwin), Solaris/SunOS, FreeBSD, DEC OSF1, DEC Ultrix and IBM AIX.
Spectroscopy DatabaseIf you wish to make use of the APEC spectroscopy database, it is available from http://www.atomdb.org/
Building ISIS from source:Detailed installation instructions are available at this URL; any updates to the installation instructions appear there first. The source code distribution also contains a copy of the instructions, in the file
If the build fails, the FAQ may provide hints for solving common problems.
To build ISIS from source, the following packages must be available on your system:
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This page is maintained by John C. Houck. Last updated: May 26, 2017