XMM-Newton SAS Home Page
XMM-Newton Science Analysis System

ekstest (ekstest-2.8.1) [xmmsas_20230412_1735-21.0.0]


ekstest reads the FITS file containing the EPIC source and background time series' produced by epiclccorr or elcbuild and its associated Good Timing Interval (GTI) file produced by tabgtigen, if required. It eliminates all bins that contain null or negative values as well as those that are not in the GTIs, if the GTI file is provided. It can perform any or all of the following variability tests on the light curve to determine whether the source is variable, however if insufficient good bins remain, no variability tests are carried out.

The input FITS files must contain (net) count rates, background count rates and the associated errors. The time series must follow a regular binning scheme (i.e. equispaced time bins) [1]. The bin width is given by the keyword TIMEDEL.

XMM-Newton SOC -- 2023-04-16