(cba:news) stars of the solstice...
jop at astro.columbia.edu
Tue Dec 12 20:05:23 EST 2006
Sorry to have been awfully quiet about targets. Things have been busy
with end-of-semester, KPNO observing tun, microlens, etc.
We've been getting pretty good coverage of SDSS0407-06 = Eri, and have
again found the negative superhump which popped up last year. It may
well be a PERMANENT permanent superhumper. The trouble is that it's
sometimes a touch faint for our little scopes, and it ramps up and down
pretty fast by 2 magnitudes or so (16-18). This complicates the
analysis a lot. So I'm inclined to steer away from this difficult star.
A much brighter star which seems to exemplifies the same trends (longish
period and permanent negative superhump, and also crossing the meridian
near local midnight) is V1193 Ori. Let's do that one for the next month!
North, south, east, west... it's a star for everyone.
In the north, I recommend now FS Aur, V405 Aur, and BG CMi... and
RX0636+35=Gem. The latter is kinda tough, the others should be easy enough.
In the south, I recommend BW Scl (still) and V1193 Ori... and BG CMi if
you don't mind venturing a little out-of-hemisphere.
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