Output Files

1. An OGIP-standard [1] timeseries. All the keywords of the header of the source time series are copied over. This output dataset contains the following binary-table extensions:
   • RATE. All the keywords in the RATE extension of the input source time series are copied over. The extension contains additional or altered keywords as follows:
     • 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.

     • BKGRATIO - a real-valued keyword which records the ratio between the background collection area and the source collection area.

     The HDUCLAS3 keyword of the RATE extension is set to `RATE'. If a background TS was supplied and has been subtracted, The HDUCLAS2 keyword of the RATE extension is set to `NET'; otherwise it is set to `TOTAL'.

     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. (Values 1 can occur if the events have not been randomized in time: see section 3.5.)

     All these columns have real32 data type.

   • SRC_GTIS. This extension contains GTIs which cover all the non-null RATE values.

   • BKG_GTIS. This extension (only present if withbkgtsset=`yes') contains GTIs which cover all the non-null BACKV values.

   Note that the output dataset contains no DSS