[Aavso-photometry] reduction factor and false alarm probability

[Patrick Wils]

>   I am calculating period of delta scuti star 27 virginis using software
> period04. please can someone explain me what is reduction factor and
> false probability alarm while calculating period of variable stars. also
> how to calculate them??

The false alarm probability is the probability that the period you find is
not a genuine period, but a spurious one.  For calculation methods see
e.g. <http://adsabs.harvard.edu/abs/1982ApJ...263..835S>.  Period04
provides other methods to verify whether a period is real, e.g. it can
compute the signal to noise ratio of a frequency.
I don't know what is meant by the reduction factor in this context.

Patrick




 
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