XCOV28

Hello everyone,

Just a quick update on the progress of XCOV28.  I just updated the
website (www.physics.udel.edu/darc) with the latest information that I
have.  If there are any changes, please let me know.

It looks like XCOV28 will start on Nov 1 with the UH 2.2m.  The most
intense coverage will be between Nov 20 - Dec 16.  We still have a few
telescopes with upcoming deadlines, and a few that
will definitely be participating, but we do not have exact dates yet.
Right now, we have 19 telescopes.

We have spent some time considering secondary targets, and I think we
have arrived at a good mix.  The primary target is HS0507+0434B
proposed by Gerard Vauclair.  This is a multiperiodic star with a high
amplitude and a nonlinear light curve.  Its temperature of about 11500
K puts it in a currently unsampled region of space on our convection
plot.  So this is a very interesting target from both an
asteroseismology and convective light curve fitting view.

We have two additional southern targets.  EC04027 is a very large
amplitude DB pulsator that is dominated by a single mode.  Our goals
are to obtain a convective light curve fit of this star, as well as
study its stability for possibly measuring its rate of period change.
BPM31594 is a DA pulsator that looks a lot like PG1351, with a single
mode and subharmonics.  We are planning on folding this star's light
curve to obtain a convective light curve fit.

Finally, we have two additional northern targets.  HL Tau 76 is a well
known multiperiodic DA star with a nonlinear light curve.  G191-16 has
a similar light curve.  We are including these stars to examine
their potential for convective light curve fitting.  If the weather is
great everywhere, we may be able to obtain these goals with this run:)

We are also putting together our Headquarters crew.  If you are
interested in coming to HQ for part of the run, let me know.

Cheers,
Judi