i. introduction


The X-ray astronomy Analysis System (XAS) is a software package developed in the framework of the SAX mission (but aiming to mission independence) by a few persons in the Italian CNR institutes since before the '90s.

An overview of the design of XAS is presented elsewhere and is available on line at http://sax.iasf-milano.inaf.it/Sax/xasblurb.html.

A presentation of XAS has been made at the 5th International Workshop on "Data Analysis in Astronomy" (Erice, Oct 27-Nov 3 1996) and a compressed PostScript version of the paper is available (also PDF). XAS has been distributed internally to the SAX consortium since 1992 care of ITESRE . With the establishment of SAX SDC the task of distribution to the public has been assigned to the latter institution.


A preliminary version of this HTML XAS user manual has been setup since late 1995. It has now (3 Jan 1997) been upgraded and a "PostScript snapshot" produced. For correction and updates make reference to the online version at http://sax.iasf-milano.inaf.it/Xashelp/.

It is planned to add in a more or less near future also a HTML XAS Programmers manual : watch this space.


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