XMM-Newton Science Analysis System
omdetect (omdetect-5.41) [xmmsas_20190531_1155-18.0.0]
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
XMM-Newton SOC/SSC -- 2019-06-02