XMM-Newton Science Analysis System
eradial (especget-1.54) [xmmsas_20211130_0941-20.0.0]
The PSF is fit to the radial profile with a linear fit where the
constant is the background and teh linear term is the
normalisation of the PSF to the strength of the source.
The code performs a fit weighted by the inverse of the error
on each data point. The RMS fit statistic is displayed.
XMM-Newton SOC -- 2021-11-30