An X-Ray Spectral Fitting Package
New Version 12.12.0 Now Available!
release notes for the many new enhancements User's Guide for version 12.12.0
Helpful information available includes:
Frequently Asked Questions
Download and installation instructions
Xspec v12.12.0 release notes
internal functions guide
Xspec facebook group
v12 versus v11
A page comparing the design and capabilities of the new and old versions.
Xspec v11 Manual
The final version of the manual for v11.
Details of Xspec redesign
A site section displaying the design details and implementation of the new Xspec version 12.
For an overview of the redesign project, see
Redesign & Reimplementation of Xspec Dorman, Ben & Arnaud, K. A. 2001 in Astronomical Data Analysis Software and Systems X, ASP Conference Proceedings, Vol. 238. Edited by F. R. Harnden, Jr., Francis A. Primini, and Harry E. Payne. San Francisco: Astronomical Society of the Pacific, p.415
Download the full Xspec v12.12.0 manual.
The latest Xspec reference is ...
Arnaud, K.A., 1996, Astronomical Data Analysis Software and Systems V, eds. Jacoby G. and Barnes J., p17, ASP Conf. Series volume 101.
Xspec 12 was developed by
Keith Arnaud, Ben Dorman, and Craig Gordon,
HEASARC Software Development, Astrophysics Science Divsion,
Code 660.1, NASA/GSFC, Greenbelt MD 20771
Please send comments, questions, and bug reports to
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Last modified: Thursday, 30-Sep-2021 13:57:14 EDT