HEASoft

A Unified Release of the FTOOLS and XANADU Software Packages

The current version of HEASoft is 6.35.1

(27 March 2025)

Included Packages

  • XANADU: High-level, multi-mission tasks for X-ray astronomical spectral, timing, and imaging data analysis.
  • FTOOLS: General and mission-specific tools to manipulate FITS files.
  • FITSIO: Core library responsible for reading and writing FITS files.
  • FV: General FITS file browser/editor/plotter with a graphical user interface.
  • XSTAR: Tool for calculating the physical conditions and emission spectra of photoionized gases.

Download

Users may download either the source code for the software and compile the tools themselves, or download precompiled executables for the most widely used computer platforms.

The HEASoft Release Notes 6.35.1 give an overview of changes since HEASoft version 6.35.

For a list of known issues in the latest release, visit the HEASoft Known Issues page.

Install

For help installing HEASoft on your system, please visit the appropriate link here:

See also the video walkthrough describing the installation process on a Mac.

For guidance regarding removal of HEASoft from your system, visit the uninstall page.

Mailing List

To receive notices of HEASOFT releases, subscribe to the "FTOOLS Notes" mailing list by sending an e-mail with an empty Subject and "subscribe" in the body to ftoolsnotes-join@lists.nasa.gov

Documentation

Xselect Users' Guide v2.5 online pdf tarred HTML
Xspec Users' Guide online pdf tarred HTML
Ximage Users' Guide online postscript tarred HTML
Xronos Users' Guide online postscript tarred HTML
HEASoft Developers Guide Basic developers guide for HEASoft is available online
HEASP Developers Guide Developers guide for the HEASP Spectral Library is available online.
PIL Developers Guide Developers guide for the Parameter Interface Library is available online.
Previous Versions: Table of component version numbers inside the HEASoft package.
Previous Release Notes:

See Also