[vsnet-campaign 889] Re: [vsnet-newvar 842] WR104 = HadV82 period analysis

[Chris Lloyd <cl@ast.star.rl.ac.uk>]

I beg to disagree. The best period I find in the Had data is 381 days but
the scatter is large and the light curve is not particularly believable. A
slightly longer period produces an eclipse-like feature but I quickly
ignored that. The Tmz data produces a completely different periodogram
with the best period at 2180+/-130 days, corresponding to the clear
variation in the data, and two other possible (in the broadest sense)
periods at 298 and 245 days. These last two do not produce anything that
you'd call a light curve. However, when the data are prewhitened with a
polynomial both of these periods remain and begin to look more realistic.

It is clear that there are variations on a variety of time scales, both
very long and 200-300 days, and shorter duration as well, but these are
not well sampled.

Cheers

Chris Lloyd

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