XMM-Newton Science Analysis System
omsource (omsource-1.27) [xmmsas_20190531_1155-18.0.0]
If the source is “extended” then this spin-box sets the position-angle
of the semi-major axis (measures anti-clockwise from the +ve x-axis).
XMM-Newton SOC/SSC -- 2019-06-02
