This command allows to export WWZ period data to two text files, named WWZOutput.txt and WWZMaxOutput.txt. The first file contains all WWZ data used in the WWZ Period Window. The second file contains the points at which the WWZ statistic was maximal. The following dialog box appears:

As mentioned in the dialog box, the two text files each have 7 columns:

    • Time: the time being examined (mostly in JD)
    • Period: the period being tested
    • Freq:  the frequency being tested
    • WWZ: value of the WWZ statistic. This is approximately an F-statistic1 with "effective number" of data and 2 degrees of freedom, and expected value 1. In short, it indicates whether or not there is a periodic fluctuation of the given frequency at the given time
    • SemiAmpl:  weighted wavelet amplitude. If the signal is periodic at the frequency being tested, this gives the (real semi-) amplitude of the corresponding best-fit sinusoid.
    • MeanMag: mean apparent brightness of the variable star at the corresponding time.
    • EffNbr: the effective number of data for the given time and frequency being tested.

A user first has to select the Output folder where the two text files need to be stored, by clicking on the button with the three dots "...". Next click the Export button to start the export. Click the Cancel button to close the dialog box without further action.

(1) For an introduction to F-statistics, we refer to