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(cba:news) CR Boo! (Joe Patterson) [2012-03-28T12:04:59Z]
Josch Hambsch's observation revealed CR Boo at 17.5 last night. We've
been waiting for this! Since it's equatorial and transiting near
midnight, the star is pretty well placed for everyone - and it would be
awfully nice to jump on this bashful star and obtain time series before
it leaves this rare low state. The relevant period is ~25 minutes, but
there's not much known about what will show up... so probably you can
afford longish integrations - but not too long. Most people should
observe unfiltered, but if you have a (relatively) big telescope and
very good night, some filtered photometry.
And if you have any opportunity to obtain spectroscopy (on a 1+ m
telescope), do it! The only time we ever caught CR Boo faint, we
obtained a super-strange spectrum - it looked like a G star with
helium-2 emission. That's strange enough to be a good candidate for a
mistake; but we thought hard about it, and couldn't figure out any
mistake we made.
We haven't been watching *extremely* closely... but for me, it's been a
20-year wait.
joe