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XMM-Newton Science Analysis System


omsource (omsource-1.15.5) [xmmsas_20080701_1801-8.0.0]

Meta Index / Home Page / Imaging Mode Photometry Window

Source type Controls

A source can be of two types, point-like or extended. The former refers to an unresolved source with a 2-dimensional pixel distribution similar to that of the point-spread function, whereas the latter refers to any source that has an extent significantly greater than that of the point-spread function.