XMM-Newton Science Analysis System
eposcorr (eposcorr-3.13) [xmmsas_20211130_0941-20.0.0]
At the moment we have no rigorous mathematical method to handle the statistical
errors of the offsets found.
For the moment we use the square root of the second order moment in as a
function of off-set divided by the number of optical counter parts.
XMM-Newton SOC -- 2021-11-30