On-the-Fly Automated X-ray Data Analysis for Grid Computing and the Virtual Observatory

Details On-the-Fly Automated X-ray Data Analysis for Grid Computing and the Virtual Observatory On-the-Fly Automated X-ray Data Analysis for Grid Computing and the Virtual Observatory

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.0903p&link_type=abstract

American Astronomical Society, HEAD meeting #11, #9.03; Bulletin of the American Astronomical Society, Vol. 41, p.668

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We are developing a system to combine the Web Enabled Source Identification with X-Matching (WESIX) web service, which emphasizes source detection on optical images,with the XAssist program that automates the analysis of X-ray data. XAssist is continuously processing archival X-ray data in several pipelines. We have established a workflow in which FITS images and/or (in the case of X-ray data) an X-ray field can be inputted to WESIX. If an X-ray field is requested, WESIX queries XAssist web services to see if the field is publicly available and if so if it has been fully processed in a pipeline. If it has been processed then image(s) and source lists are returned. If the X-ray data is public but has not been processed, XAssist returns the X-ray image for WESIX to perform quick-look analysis (using SExtractor) and the field is added to the XAssist queue for full processing. These services will be available via web services (for non-interactive use by Virtual Observatory portals and applications) and through web applications (written in the Django web application framework). We are also adding web services for specific XAssist functionality such as determining the exposure and limiting flux for a given position on the sky and extracting spectra and images for a given region. We are also improving the queuing system in XAssist to allow for "watch lists" to be specified by users, and when X-ray fields in a user's watch list become publicly available they will be automatically added to the queue. This work was funded by AISRP grant NNG06GE59G.

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