EXPLORING THE X-RAY TRANSIENT AND VARIABLE SKY EXTraS aims and objectives

A Kreikenbohm, A Deluca, S Carpano, C Delvaux, J Greiner, F Haberl, D Law-Green, M Oertel, A Read, S Rosen, A Tiengo, J Wilms
unpublished
Modern X-ray observatories can yield unique insights into time domain astrophysics. Indeed, a huge amount of information is already stored-and largely unexploited-in data archives. The EXTraS project harvests the hitherto unexplored temporal domain information buried in the serendipitous data collected by the European Photon Imaging Camera (EPIC) onboard the ESA XMM-Newton mission since its launch. This includes a search for fast transients, missed by standard image analysis, and a search and
more » ... aracterization of variability (both periodic, aperiodic and long-term) in hundreds of thousands of sources spanning more than nine orders of magnitude in time scale (from ≤ 1 s to 10 yr) and six orders of magnitude in flux (from 10 −9 to ≥ 10 −15 erg cm −2 s −1 in 0.2-12 keV). X-ray results are to be complemented by multiwavelength characterization of new discoveries. Phenomenological classification of variable sources will also be performed. Our final catalogue and results will be made available to the community, together with new analysis tools, at the end of the project (end of 2016).
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