Epoch Folding 1 Series (Application)
Application ef1 produces a folded light curve of one series of data. It is run in the Question/Answer user interface by typing:
[n]Xronos> ef1in the Partial Question/Answer user interface by typing:
[n]Xronos> ef1 [series1]and in the Command-Driven user interface by typing:
[n]Xronos> ef1/period=X[/qualifier1/qual2/... etc] [series1]where the /period= qualifier specifies the period over which the data are folded (in seconds if X>0 or days if X<0).
There are two important input parameters for folding applications: the epoch and the period over which the data will be folded. In folding applications the newbin time corresponds to the time duration of a phase bin in the folded light curve. This is determined by the chosen number of phasebins per period. The default is such as to produce a folded light curve with 128 phasebins at maximum. The newbins per interval, together with the newbin time, determines the length of the time axis (an ``interval") over which each folded light curves is accumulated. Folded light curves from different intervals can be averaged in one or more frames. The default is to produce one frame only. The reason for averaging folded light curves from different intervals in a frame is to work out the error bars in the folded light curves from the standard deviation of the mean values of each phase bins. To calculate the error bars in this way global parameter number 9 (default =5) must be smaller than the specified number of intervals per frame. Note that two cycles and error bars are plotted by default.
The analysis normalisation flag, specified by global parameter number 11, has the following meaning for application ef1: