[vsnet-campaign-dn 4443] V660 Her

Taichi Kato tkato at kusastro.kyoto-u.ac.jp
Thu Jun 23 10:43:13 JST 2005


V660 Her

   CV folks would be interested.  There was also a VSNET campaign (covering
multiple superoutbursts), which is probably being analyzed by Imada-san(?)
V660 Her seems to be a fairly normal SU UMa-type dwarf nova with a typical
Pdot.

Paper: astro-ph/0506487
Date: Tue, 21 Jun 2005 12:00:59 GMT   (258kb)

Title: Curious Variables Experiment (CURVE). CCD Photometry of Dwarf Nova V660
  Herculis
Authors: A. Olech, K. Zloczewski, L.M. Cook, K. Mularczyk, P. Kedzierski and M.
  Wisniewski
Comments: 11 pages, 7 figures, Acta Astronomica, in print
\\
  We report extensive photometry of the dwarf nova V660 Herculis. During our
campaign, lasting from August 2003 to November 2004, we recorded one bright
eruption which turned out to be a superoutburst lasting about 15 days and
having amplitude of ~4.5 mag. Clear superhumps with a mean period of Psh =
0.080924(18) days were present during all nights of the superoutburst. The
period of the superhumps was not stable and in the interval covered by our
observations it decreased with a rate of -4.0(1.4) * 10^{-5}.
  Basing on our data and the known orbital period of the binary (Thorstensen
and Fenton 2003) we calculate the period excess of 3.4 +/- 0.1%, which is
typical for an SU UMa star at this orbital period. This value indicates that
the mass ratio of the system is q=0.154.
\\ ( http://arXiv.org/abs/astro-ph/0506487 ,  258kb)



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