(cba:news) sdss1502+33 and others
jop at astro.columbia.edu
Tue Jul 14 13:37:59 EDT 2009
Thanks for all the great data on SDSS1502 = Boo! Very well-defined
eruption, lots of eclipses and superhumps and features well suited for
timing studies. It's down to around 16 now, so I imagine will soon
disappear from most of your radar screens. But if you're up to a
deep-sky challenge, stay with it.
Just to reiterate, V442 Oph is in a very rare low state (around 17) and
we'd like to hammer away on it for a while longer. Still pretty sparse
CBA coverage (nearly all from Bob Rea)... though enough to define the
orbital period. A good star to gang up on.
Time to quit on RX1643+34 = V1084 Her. We've got enough.
Many DQ Her stars (intermediate polars) in the sky now. We track the
pulse timings of these stars, and now's the time for the early-season
timings that are vital. DQ Her, V2306 Cyg, and V455 And are all good
northern targets now. V1223 Sgr, RX1730-05 (Oph), AO Psc, and FO Aqr
are all good southern or equatorial targets.
We'd like to go another 1-2 weeks on V4743 Sgr. What a strange star -
full of periods, but still quite mysterious as to what they mean!
More information about the cba-public