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A. Ptak (Johns Hopkins University)
XAssist (http://www.xassist.org) is a tool (available for download) for automatically downloading, reducing and performing preliminary analysis on Chandra, ASCA, ROSAT and (eventually) XMM-Newton data. The system is capable of reprocessing data, running source detection algorithms (a built-in routine is used fro ASCA and ROSAT data, CIAO's wavdetect is used for Chandra data), determining median background levels, filtering flares from background light curves, determining source extent (using a method that is statistically-correct in the Poisson regime), calculating the K-S statistic for variability, and extracting and fitting spectra (for sources with sufficient numbers of counts). A pipeline is currently being run on all available Chandra and ROSAT HRI observations that contain an RC3 galaxy in the field of view (to date, ~2000 ROSAT data sets and ~150 Chandra data sets have been analyzed) to demonstrate XAssist's capabilities. These catalogs are publicly available and a sample of the results will be presented.
This work is supported by the NASA AISR program with contract NAG5-8092.
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The author(s) of this abstract have provided an email address for comments about the abstract: ptak@pha.jhu.edu