(cba:news) VX For down, and TT Ari ever so up
jop at astro.columbia.edu
Fri Oct 23 08:41:48 EDT 2009
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.
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