XMM-Newton Science Analysis System
omsource (omsource-1.27) [xmmsas_20190531_1155-18.0.0]
if this check-box is enabled the photometry is performed as for
an extended source. The user can change the axial-ratio by clicking on
the a/b spin-box and position-angle by clicking on
the Pos angle spin-box) and the inner and outer background radii for the
background determintaion (by clicking on the Inner bck and Outer bck
spin-boxes, respectively). Note that the background annulus will have
the same ellipticity and position-angle as for the photometry aperture.
XMM-Newton SOC/SSC -- 2019-06-02
