(cba:news) UX UMa, RW Sex, and V842 Cen
jop at astro.columbia.edu
Sat Mar 28 20:29:45 EDT 2015
It seems likely that UX UMa is exhibiting negative superhumps, along
with the "nodal" signal that frequently accompanies it. This is a major
discovery in a star long thought to be well-understood - and the
prototype for one type of CV. Our coverage does suffer from some gaps,
though, and it would be great if we could get excellent data over the
next week or two. Especially excellent in longitude coverage, since the
periods are kinda long: ~5 hours and ~4 days.
And as long as UX UMa is going to show superhumps, let's try for RW Sex
as well - the other very bright "UX UMa star" in the sky this month.
Both hemispheres OK for this one, and I recommend a V filter since there
are plenty of photons available.
But the BEST southern target now is V842 Cen, the remnant of Nova Cen
1986 #2. Alleged to be a DQ Her star (56 seconds) and also a negative
superhumper (~4 hr). These are things we can definitely test.
I'll leave it up to Enrique to decide when to end the campaigns on DW
UMa and VZ Sex. Still got a broken hand/wrist, and rehabbing from hip
surgery (so far, so good).
Center for Backyard Astrophysics (CBA) mailing lists
More information about the cba-public