(cba:news) mid-june stars
jop at astro.columbia.edu
Sun Jun 11 22:34:21 EDT 2006
Olde Whiteface has rolled around again, and our menu gets a little
restricted this time of month. Here goes...
It's time to retire RX1643+48 (Her) for the year. The coverage has been
very, very good - good enough to specify any periods present in the light
curve. As with the previous year's coverage, the dominant signal is the
1000 second quasi-periodic oscillation - and other signals are pretty
subtle by comparison. Likewise, it's time to retire HP Lib; it looks like
the coverage is sufficient to track Porb - as well as the more obvious
P(superhump) - so that's enough reward for the year!
Likewise EX Hya. Great coverage - but the season's over.
A good northern target now is V1316 Cyg. As Tom says, it's now in
superoutburst, and we've never found the superhumps before. Time to
spring into action.
A good equatorial target is RX1730-05 (Oph). But make sure you use a
short integration time; the key period is 128 s, presumably the spin
period of the white dwarf. The other good equatorial target is V603
Aql; at V=11.6, this is definitely the easy target for all-longitude,
all-latitude, all-scope coverage.
For short morning observations (both hemispheres, but especially
southern), try AO Psc and FO Aqr - to measure the long-term ephemerides
of the rapid pulsations.
And keep V617 Sgr and V1223 Sgr on the menu. These are still prime
Last month's meeting went beautifully. I was really thrilled with the
outcome - the photometry talks were excellent, and the prospects for CBA
growth seem awfully promising since many new people expressed interest.
It'll take me a month to write 'em all... but I'm very excited about
the CBA in the year ahead!
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