National Aeronautics and Space Administration

An X-Ray Spectral Fitting Package

User's Guide for version 12.10.1

Helpful information available includes:

Frequently Asked Questions

Link to download and install instructions page

XSPEC v12.10.1 release notes

XSPEC wiki

Keith's xspector blog

xspec facebook group

Xspec v11 Manual The final version of the manual for v11.

v12 versus v11 A page comparing the design and capabilities of the new and old versions.

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 v12.10.1 manual.

Manual in Portable Document Format (PDF)
Adobe Acrobat (link to free download for reader)

Manual in HTML format

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.

Please send comments, questions, and bug reports to xspec12@athena.gsfc.nasa.gov