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(cba:news) TT Ari take 2, or even 3 (Joe Patterson) [2009-11-03T19:33:41Z]


Dear CBAers,

Today's messages from Tom, and Ivan Andronov, establish that TT Ari has dived low again - maybe even (very transiently) to its full low of V~16. This makes the situation kind of murky. I was just about to suspend the campaign, since the light curves around V=13, where the star has been dallying, look very complex - hard to decipher. But after just looking at Tom's light curve... that crazy huge-amplitude signal around 0.35-0.40 d is back! This is emphatically a GREAT target in the days to come. That mysterious signal maintained pretty good coherence for about a week; and if it does so again, then we can bridge the gap to see if the underlying signal is truly phase-stable.

So please rev up your engines again for TT Ari! Most of you will probably want to do V or clear photometry, in an attempt to get good time-resolution (in addition to the 0.4 d signal, there are very fast and very large variations).

Back to the light curves.  Another message soon...

joe