From jop at astro.columbia.edu  Thu Apr  2 20:22:24 1998
From: jop at astro.columbia.edu (Joe Patterson)
Date: Thu, 2 Apr 1998 20:22:24 -0500 (EST)
Subject: (cba:news) CI Cam, surrender!
Message-ID: <199804030122.UAA15856@tristram.phys.columbia.edu>


Dear CBAers,

As you might hashave heard there's a new X-ray transient, and it
seems to be coincident with the symbiotic star CI Cam - 2000 coords
04h 19m 42.1s +55d 59m 58s.  That is amazing , wonderful news - an
X-ray transient in a bright interacting binary star!  Let's go for it.
If you happen to have a U filter, that would be best.  But all coverage would be good.  More details tomorrow I hope.

joe


From jop at astro.columbia.edu  Mon Apr 13 14:53:57 1998
From: jop at astro.columbia.edu (Joe Patterson)
Date: Mon, 13 Apr 1998 14:53:57 -0400 (EDT)
Subject: (cba:news) campaigns du jour
Message-ID: <199804131853.OAA07148@tristram.phys.columbia.edu>


Dear CBAers,

Well, we have a real bolide streaking brilliantly across the CBA sky.
Last night Jonathan found a huge (1.7 mag) photometric wave in MV Lyrae,
which is in a semi-low state at magnitude 15.5-16.  This wave seems to
be at something close to the 3.2 hr orbital period, but that remains to be
seen.  It's a great, great morning object for CBAers of all apertures.

The other stars we are doing intensive campaigns right now are HP Lib
and AM CVn.  HP Lib is the higher priority - we've never gotten (nor has
anyone else) any extended-longitude coverage of this star.  It's bright
(13.6) and equatorial (dec -14) and the period is plenty fast (1119 s)
to keep your light curves sparkling.

Finally, for the bigscopers, there's MM Hya.  This guy is flashing both
orbit and superhump simultaneously, and with large amplitude (about 0.2
mag).  Getting late in the season, but we keenly want another 2-3 weeks
on it before waving goodbye to it.  That's the same as Hya 1, or
PG0911-066, by the way.

Plenty of fine stars up there!

joe