[vsnet-alert 8750] Fw: DV Dra extremely rare outburst

[Daisaku NOGAMI]

Dear colleagues,

P. Schmeer reported his detection of an outburst of DV Dra
as below.  Patrick's observations indicate that this outburst
is in the early phase, if DV Dra is really a WZ Sge-type dwarf
novae.  Early superhumps with a doubly-peaked shape may be
observed at present.

We would first encourage confirmation of this outburst which
occurred after a 20-years dormancy.  Then, while DV Dra is not
at a very good position for observations, please try to carry
out time-resolved photometry.

Best regards,
Daisaku Nogami

Begin forwarded message:

Date: Tue, 22 Nov 2005 08:33:39 +0100 (CET)
From: Patrick Schmeer <pasc1312-aavso at yahoo.de>
To: vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp, vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp, vsnet-campaign at ooruri.kusastro.kyoto-u.ac.jp
Subject: [vsnet-alert 8749] DV Dra extremely rare outburst


Unfiltered CCD observations by P. Schmeer, Bischmisheim, Germany:
DRADV 20051115.065 <175CR Scp
DRADV 20051117.067 <180CR Scp
DRADV 20051118.064 <172CR Scp
DRADV 20051119.064 <180CR Scp
DRADV 20051122.062  151CR Scp
Instrument: University of Iowa, Rigel Telescope (0.37-m Cassegrain)
Sequence: Henden and Sumner (R magnitudes derived from V and B-V)

On the outburst image I measured the following position:
R.A. 18h17m23.07s  Decl. +50o48'17.7"  (J2000.0)
 
The only previously recorded outburst (a supermaximum) of this
UGWZ candidate was observed on 1984 June 1.9 UT at mpg= 15.0
(IBVS 3626).
 
Time-resolved photometry is very urgently required.
 
Regards,
Patrick