(cba:news) Outburst of VW Hyi
jop at astro.columbia.edu
Sat Nov 26 05:57:36 EST 2011
Despite the rash of fascinating targets in this month's night skies -
and in particular the first-in-history eruption of BW Scl - I'm inclined
to give VW Hyi an emphatic welcome to the CBA menu. Although it has
been studied a lot, it has never been thoroughly studied with today's
"all-telescopes-all-the-time" techniques... and as one of the
nearest/brightest dwarf novae, it promises to yield a lot of information
from such close scrutiny. In particular:
(1) the fascinating but still little-known fine structure of superhumps
(nw-mW, where n and m are unequal integers);
(2) the details of how power gets shuffled between orbit and superhump
(3) the possible transient appearance of negative superhumps; and
(4) the precise shape of the long-term O-C.
With very nearly global coverage of the outburst, I bet VW Hyi would
have something useful to contribute to each of these questions. And
that doesn't even count the harvest of unanticipated results... which is
the usual outcome of *any* scientific experiment!
I imagine that VW Hyi will be an all-night target for you australites...
which might threaten BW Scl somewhat. I hope there's enough telescopes
and overlap of coverage to permit both targets!
Why? Because it's one of the very brightest of dwarf novae
-------- Original Message --------
Subject: [vsnet-alert 13894] Outburst of VW Hyi
Date: Sat, 26 Nov 2011 11:19:53 +0100
From: Josch Hambsch <hambsch at telenet.be>
To: <vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp>
I have been observing VW Hyi for the past two nights on request and
observed a rise in magnitude from about 13.5 on Nov. 24/25 to 10.1 on
I have taken time series during both nights (the last night is still
busy to be analysed) and those will be submitted to VSNET and AAVSO.
Please advice whether I should continue time series or only snapshots
during the coming nights.
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