6 Further information

The SPEX software package can be obtained via the World Wide Web, together with files containing information about installation. The WWW address of the Space Research Organisation Netherlands is

http://www.sron.nl/

in which "High Energy Astrophysics" (HEA) should be selected and then the item "SPEX". A README file and Installation Document is available together with other details. Further information may be obtained from Dr. Jelle Kaastra (e-mail J.Kaastra@sron.nl) or Dr. Rolf Mewe (R.Mewe@sron.nl).

Acknowledgements

We thank the British Council (Amsterdam) and the Netherlands Organisation for Scientific Research (NWO) for financial help with this project. KJHP and LKHM acknowledge the hospitality of SRON during their visits. Part of this work was made possible by the support of the Space Research Organization of the Netherlands (SRON). Work performed at LLNL was supported by NASA X-Ray Astronomy Research and Analysis Program work order W-19127 and performed under the auspices of the U.S. Department of Energy under contract W-7405-ENG-48. We thank Dr. F. Bely-Dubau, the referee, and Dr. S. Drake for helpful comments.