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XMM-Newton Science Analysis System


omphotom (omphotom-0.6.6) [xmmsas_20070708_1801-7.1.0]

Meta Index / Home Page / Photometry / Point sources

Recommendations

For FAST mode data, method 3 (PSF fit including background) is recommended. If the source has one or more close neighbours, then those sources should be included in the fit. Method 6 (PSF fit including background and a fit to the positions), may/may not give a slightly better fit, but should be used with caution.

For IMAGING mode data, if the source has one or more close neighbours, then method 3 (PSF fit to the source and its neighbours and including the background) is recommended if the source has one or more close neighbours. Method 6 (PSF fit including background and a fit to the positions), may give a slightly better fit, but should be used with caution.