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(cba:news) VX For down, and TT Ari ever so up (Joe Patterson) [2009-10-23T12:41:56Z]



Dear CBAers,

I think VX For has about finished its show. Maybe it has one more echo ahead of it, but it'll be a big-scope target from now on.

As some of you know, TT Ari has been sensational, flashing an entirely unexpected periodic or quasiperiodic signal of enormous amplitude (1.4 mag), and P~0.38 d. This is certainly something new to the world of (human knowledge of) TT Ari, and quite possibly to CVs generally. We can track it - the star's bright enough, equatorial enough (sort of), and sufficiently well-placed in the sky to permit a really close watch. I'll send the merged light curve so far to campaigners, and say more tomorrow about observing styles (although continuous V - preferably - or clear monitoring is OK).

We have an Asia-Pacific gap for northern targets, as usual, and it would
be really good if AU/NZ observers helped us fill this gap. Photometric precision and length of run is not so important when you're mainly filling a gap.

More tomorrow, or tonight.

joe