(cba:news) [Fwd: HS 2219+1824 possible superoutburst]
jop at astro.columbia.edu
Sun Oct 19 07:30:09 EDT 2008
Patrick's note on HS 2219+1824 is well worth your attention. This is a
very interesting, fairly nearby CV with the white dwarf and secondary
star both visible in the spectrum (quite a rarity). Past observations
in superoutburst have been kind of sketchy, and an October eruption is
happily timed for long time series for northern observers. At 12th
magnitude, what's not to like?
Good for not-too-far-south australites, too. Even fairly short runs at
the off-longitudes (e.g. AU/NZ) sharpen up the power spectrum A LOT...
and this gives access to information around the harmonics (which can be
revealing of disk structure).
A nice paper to read, with a chart and many details, is Rodriguez-Gil et
al. 2005, A&A, 431, 269.
As usual, good eruptive targets should supplant the nonerupters as
campaign stars. Plenty of time for the latter once the erupters have
faded. On the other hand, there's always a chance this is a *normal*
outburst - which are basically featureless photometrically and
spectroscopically. In a day or two, we'll know. And maybe you'll know
- the detection of superhumps is the gold standard for superoutbursts.
-------- Original Message --------
Subject: (cba:news) HS 2219+1824 possible superoutburst
Date: Sun, 19 Oct 2008 04:40:57 +0000 (GMT)
From: Patrick Schmeer <extpasc at yahoo.de>
Reply-To: cba-chat at cbastro.org
To: CBA News <cba-news at cbastro.org>
Visual magnitude estimates by P. Schmeer, Bischmisheim, Germany:
HS2219+1824 20081017.79 <135 SPK
HS2219+1824 20081018.787 120 SPK bright (superoutburst?)
This is an excellent opportunity to study a bright outburst
of this relatively 'new' SU UMa-type dwarf nova from the
very beginning. Time-resolved photometry is strongly
Precise coordinates (J2000.0):
R.A. 22h21m44.79s, Decl. +18o40'08.3"
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