XMM-Newton Science Analysis System
epreject (epreject-5.7) [xmmsas_20050815_1803-6.5.0]
Meta Index / Home Page / Description / Soft flare rejection for
Screening the data on the Flare column requires the user to keep several
things in mind when interpreting the data down to 200 eV.
- Spectra:
They are problematic as all photons in the given PHA range during
soft flares are removed from the eventfile (both source and softflare events).
Spectral fits to the screened data can be performed for PHA values greater
than the upper PHA limit given by the user.
Below that the total exposure time is reduced as a consequence of the flare
removal. A correct handling for this would require energy dependant GTIs.
In the future a method for statiscally separating source and softflare
events could correct this but could be problematic for stronly variable
sources.
- Timing:
There is no problem above the upper PHA limit. But below the
upper PHA limit the same applies here as for the spectra.
Here the also as a consequence of the flare removal total exposure
time is reduced.
XMM-Newton SOC/SSC -- 2005-08-15