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


omsource (omsource-1.25.1) [xmmsas_20160201_1833-15.0.0]

Outer bck Annuli controls Pos angle Home Index

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

a/b

This spin-box determines the ratio of the semi-major to minor axes (only enabled if the source is ``extended''. The semi-major and semi-minor axes of the inner and outer background annulus will also have this ratio.


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