XMM-Newton Science Analysis System
omsource (omsource-1.27) [xmmsas_20190531_1155-18.0.0]
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 -- 2019-06-02