V402 And: New member of SU UMa-type dwarf nova
G. Poyner reported in
[vsnet-alert 5268] that
M. Mobberley detected
an outburst of this poorly known dwarf nova on September 20 (15.7mag).
T. Vanmunster had <17.0 on a CCD image taken on September 18.
T. Kato confirmed the reported outburst at Ouda Station, Kyoto University
on September 21 (V=15.3)
He also reported the
clear presence of superhumps in the light curve obtained on September 21.
This revealed V402 And is a new SU UMa-type dwarf nova
The quiescent magnitude of the coincident USNO star indicates
the outburst amplitude of this star is around mag 4, which is rather small
as a typical SU UMa stars
T. Kato reported
the amplitude of the superhumps are almost constant around 0.25mag
and calculated the best candidate of the
superhump period to be 0.0634 d using the data observed at Ouda and by
The VSNET collaboration team revealed the superhump
period is calculated to be 0.06343 d