This distribution includes preprints posted between Friday, February 18, 2005 and Friday, February 25, 2005 (7 days). ANNOUNCEMENTS NEW INTEREST CATEGORIES: To accurately reflect the expanding focus of science at SLAC, we've revisited our list of interest categories for SLAC preprints. Authors can now choose from a new list of 24 categories covering not only high energy physics, but also synchrotron radiation and its disciplines, X-ray free electron lasers, and astrophysics. We've updated the categories on idoc, our online document registration system (http://idoc.slac.stanford.edu/), on the list of Recent SLAC Publications (http://idoc.slac.stanford.edu/preprints/), and on the Preprint Weekly list below. IMPROVED PREPRINT SEARCH: Our new Find a SLAC Document page includes three searches to help you quickly find the document you're looking for. This page includes a full-text search of over 10,000 SLAC preprints as well as easy access to bibliographic and citation information. Check out the new search at http://www.slac.stanford.edu/pubs/fastfind.html. ************************************* Astrophysics-related preprints SLAC-PUB-11031 Afterglow Observations Shed New Light on the Nature of X-ray Flashes Granot, J Released: 2/25/2005 http://www.slac.stanford.edu/cgi-wrap/pubpage?slac-pub-11031 SLAC-PUB-11032 Intrinsic Curvature in the X-Ray Spectra of BL Lacertae Objects Perlman, E. Released: 2/25/2005 http://www.slac.stanford.edu/cgi-wrap/pubpage?slac-pub-11032 SLAC-PUB-11033 A High-Power Test of An X-Band Molybdenum Iris Structure Grudiev, A. Released: 2/25/2005 http://www.slac.stanford.edu/cgi-wrap/pubpage?slac-pub-11033 ************************************* For the most current listing of newly released SLAC publications and reports, see Recent SLAC Publications at http://idoc.slac.stanford.edu/preprints/. ************************************* Please report any problems to: Technical Publications Department [log in to unmask]