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Дата индексирования: Tue Aug 18 14:54:09 2009
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XMM-Newton Science Analysis System


omdetect (omdetect-5.14.2) [???]

Meta Index / Home Page

Source classification

A source is classified as either ``point-like'' or ``extended'' by comparing its computed semi-major axis with that of the point-spread function, both having been computed using moments. A source is ``extended'' if the difference between its semi-major axis and that of the PSF is greater than 3 times the error in the semi-major axis of the source, otherwise it is classified as ``point-like''.