The ASDC Multi Mission Interactive Archive on line analysis of the Swift/XRT data

We present the Swift/XRT Interactive Archive and the On-line Analysis tool developed at the ASI Science Data Center (ASDC) as part of the Multi Mission Interactive Archive. The On-line Analysis enables to run the Swift/XRT software task ``xrtpipeline'' on any desired XRT observation present in the Swift data archive maintained at ASDC, directly on the web. On-line imaging (with XIMAGE), spectral (with XSPEC) and timing data analysis (with LCURVE) can be performed. At the same time, spectra, light curves, effective area, exposure map and response matrix are promptly available for download to the user for any off-line analysis.