[vsnet-alert 7549] Var73 Dra superoutburst

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

Var73 Dra superoutburst

Dear Colleagues,

    The Kyoto observations (observers: M. Uemura and R. Ishioka) have
detected a bright outburst of Var73 Dra, a long-period (probably in the
period gap) SU UMa-type dwarf nova recently discovered.

    The object is located at 20 23 38.193, +64 36 26.91 (J2000.0)
reference Antipin and Pavlenko, A&A 391, 565 (2002).  (See also
vsnet-campaign-dn 2761, 2762).  The superhump period has been reported
to be P=0.0954 d.

    The object was rising on October 4, and likely attained its maximum
around October 9-10 (the data reduction was delayed because of the
occurrence of GRB 021004).  The maximum was around 15.0 or possibly brighter.
The object has been confirmed to be still bright on October 11.
Preliminary analysis of the recent data shows variations of 0.2-0.3 mag,
which are likely superhumps.  Further observations are strongly encouraged,
since the period and period derivative of this astrophysically interesting
object has not been yet well established.  More detailed analysis is
presently ongoing, and the results will be later reported by Uemura-san.

    When sending time-series observations, please also send them to
Uemura-san and Ishioka-san
(uemura@kusastro.kyoto-u.ac.jp and ishioka@kusastro.kyoto-u.ac.jp)
in order to avoid a delay of communication.

    Good observations!

Regards,
Taichi Kato
VSNET Collaboration team

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