Exposure Windows consist of a minimum and a maximum exposure level. Units are such that 1 means 100% exposure. Exposure windows can be specified independently for the exposure of (i) Bins, (ii) Newbins, (iii) Intervals, for each of the series which is being analysed.
Note that the Bin Exposure used by XRONOS applications, besides dead time includes also instrument-dependent constants (i.e. the collimator efficiency for the ME and GS, the normalisation for the LE) such that, when dealing with photon counting experiments, the relevant Poisson statistics can be reconstructed. For example if a 5 s bin in an input file has been effectively ``exposed" only for 2 s (e.g. as a consequence of dead time effects, collimator efficiencies, data dropouts etc.), then its exposure is 40%.
The Newbin Exposure is obtained by propagating the bin exposures to each newbin; for example, if in a 30 s newbin the total exposure (due to the sum of the individual exposure of the bins contributing to the given newbin) is 18 s then its exposure is 60%.
The Interval Exposure is the ratio of accepted to expected newbins: for example, if a 128 newbin long interval contains only 32 accepted newbins, then its exposure is 25%.
Note that exposures can be higher than 100% (e.g. if the newbin time is not a multiple of the bin time, then ``beats" are generated which might bring the exposure of a newbin to values >100%; or if two or more input files for the same time series overlap in part, some of the newbins will be more than 100% exposed).
Many XRONOS applications use default exposure windows (see Default Windows)