An OGIP standard [1] timeseries with a binary table extension called RATE. The output dataset has no other extensions (and no DSS). All header and RATE table keywords from the input source TS (except those pertaining to the DSS) are propagated to the output, with the following additions to the header of the RATE extension:
DEADAPP, VIGNAPP - Both T if the output timeseries is corrected for exposure, F otherwise.
BACKAPP - T if the background has been subtracted from the output timeseries, F otherwise.
The HDUCLAS3 keyword of the RATE extension is set to `RATE'. If a background TS was supplied, The HDUCLAS2 keyword of the RATE extension is set to `TOTAL'; otherwise it is set to `NET'. The column names of the RATE extension are as follows:
RATE - the source TS in counts s.
ERROR - uncertainties in the source TS values.
BACKV - the local background TS, normalised to the source collection area.
BACKE - uncertainties in the background TS values, similarly normalised.
FRACEXP - the fractional exposure. This is a dimensionless number which can have any value between 0 to 1.
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