[vsnet-alert 7590] Var73 Dra: first ER UMa-like dwarf nova in the period gap?

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

Var73 Dra: first ER UMa-like dwarf nova in the period gap?

   Donn Starkey's most recent observation almost certainly confirms that
the present outburst is a superoutburst(!).  This finding suggests that
the minimum supercycle length of Var73 Dra is around ~60 d (or possibly
slightly shorter).  This shortness of the supercycle is comparable to
those of ER UMa-type dwarf novae.  In conjunction with Antipin and Pavlenko
(2002) A&A 391, 565, the supercycle of this object may not be as stable
as in ER UMa stars.  Such a variation of the supercycles was also
recorded in the in-the-gap SU UMa-type dwarf nova, NY Ser (Nogami et al.
1998, PASJ 50, L1).

   Further observations of Var73 Dra during the present outburst is
planned.  We also strongly encourage multi-longitude observations to
compensate the short visibility in this season.

Regards,
Taichi Kato
VSNET Collaboration team

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp