Time Series Analysis

• There is a new command, TONOFF, which writes a file of on-off times in MJD, which can be used as input to XSORT. It can be used as part of the interactive Time Series Editing system or standalone. In the former case it takes on-off times from the currently selected time segments, and in the latter it uses the QUALITY array and gives on-off times for periods of good QUALITY. This can be used if you want to produce a spectrum, say, of the quiet and busy periods of a variable object. You would use the Time Series stuff to pick out the periods of interest, use TONOFF to write the file of on-off times, then sort a spectrum using the on-off times as input.