(cba:news) stars for the equinox
jop at astro.columbia.edu
Fri Mar 18 15:27:46 EST 2005
I hope many of you take a close look at the new nova Pyx (improperly so
called) over the next week or so. Here's the lowdown on other targets.
The northern targets I recommend are DW Cnc and BK Lyn. DW was a popular
larget the last two years; no coverage this year, and we need some to keep
the ephemeris tuned up. And because the light curve is *multi*periodic,
we do need LONG runs. BK Lyn is also an old friend, but we need another
season to take it to the bank!
YY Dra was bright a few days ago. If it's still bright (I dunno), it's a
GREAT target. And it's pretty good anyway - we've been trying to study
this star for 25 years, and still have very little idea what these
For both hemispheres: if you have an R or I filter, try RX1039-05 (Sex) -
even after the Moon gets annoyingly bright. It has a huge (>1.5 mag)
modulation in I light, and that'll subdue the rampaging Moon too. We very
much want to constrain a long term ephemeris for this star.
Time to end the campaign on HS0728+67 for the season. Haven't finished
the analysis yet - good project when I return.
And, as usual, pulse timings of RX0625+73 and BG CMi will be of great use!
I'm leaving for a week's vacation today - Jonathan will be holding the
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