(cba:news) TT Ari take 2, or even 3
jop at astro.columbia.edu
Tue Nov 3 14:33:34 EST 2009
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...
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