[Fwd: [vsnet-outburst 10371] IL Vul superoutburst]

From: Joe Patterson <*jop_at_astro.columbia.edu*> Date: Thu, 09 Jul 2009 22:01:54 -0400 · jop_at_astro.columbia.edu

And there's this one too!  Not eclipsing, but of substantial interest 
due to the (like) rarity of outburst.  A good post-midnight object after 
1502+33 sets.

joe

-------- Original Message --------
Subject: [vsnet-outburst 10371]  IL Vul superoutburst
Date: Fri, 10 Jul 2009 02:52:45 +0100
From: David Boyd <drsboyd@dsl.pipex.com>
To: BAAVSS alert <baavss-alert@yahoogroups.com>,	CVnet outburst 
<cvnet-outburst@yahoogroups.com>,	vsnet-outburst 
<vsnet-outburst@ooruri.kusastro.kyoto-u.ac.jp>

3.4hrs of unfiltered photometry of IL Vul tonight shows what appear to 
be 0.1
mag superhumps with period ~0.075d on top of a slowly fading trend. The 
mean
magnitude of IL Vul during the run was 16.1.

It therefore looks likely that IL Vul is a UGSU-type dwarf nova.

Regards,
David Boyd