(cba:news) cba target stars
jop at astro.columbia.edu
Tue Feb 22 14:05:46 EST 2011
Thanks for all that great coverage recently! Arto's spell of good
weather has been amazing, and of course a winter target at high
declination is very well-suited. So the coverage of SDSS1339+48 has
been superb. Shawn Dvorak (CBA-Orlando) has also provided a lot of
critical coverage (Europe has actually dominated over the USA for this
star). I attach the detrended data for one night of coverage (blend of
Arto, Enrique, Shawn). Please ask if you'd like more.
ER UMa has also, deservedly, had a lot of great coverage - almost 30
straight days. It shows a very large amplitude negative superhump,
which we want to track throughout the observing season. Some of the
usual heavyweights (Enrique and Tom) have been the main players on this one.
Both stars eminently deserve a LOT more data, and are likely to remain
decently bright for a while. The other very well-placed star, which so
far has been upstaged by these two, is BH Lyn. That eclipsing star also
deserves high priority; in 1995, it showed a prominent superhump, but
single-site coverage couldn't distinguish two periods: one slightly
longer than Porb, and one slightly shorter. Of course, the
interpretation depends critically on which is true! Let's fire away
assiduously on this one.
In the south and deep south, there's CP Pup and AH Men - both stars
presently flashing very distinct waves in the light curves gathered by
Bob Rea. But I'm very concerned to get light curves from other
longitudes - even the southern USA (maybe) for CP Pup, whose short
period (90 minutes) might make this possible.
AM CVn remains a good target, but I'm inclined to shelve YZ Cnc. My
analysis of this star is far from complete, but I suspect it won't yield
answers while competing with all these other known-to-be-worthy stars.
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