XMM-Newton SAS Home Page
XMM-Newton Science Analysis System


omsource (omsource-1.25.1) [xmmsas_20160201_1833-15.0.0]

Annuli controls Annuli controls Inner bck Home Index

Meta Index / Home Page / Fast Mode Photometry Window / Annuli controls

Aperture

This spin-box box determines the semi-major axis of the photometry aperture. For a ``point'' source the semi-minor and major axes are equal, but for an ``extended'' source the semi-minor axis is determined by the spin-box control a/b.


XMM-Newton SOC/SSC -- 2016-02-01