CAOSP abstracts, Volume: 40, No.: 1, year: 2010

Author(s): Chochol, D.; Katysheva, N.A.; Shugarov, S.Yu.; Volkov, I.M.; Andreev, M.V.
Journal: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 40, no. 1, p. 19-71.
Date: 04/2010
Title: Photometric investigation of V466 And - a new WZ Sge-type dwarf nova
Keyword(s): dwarf novae, photometry, superoutburst, superhumps
Pages: 19 -- 71

Abstract: We present the UBV(RI)_C photometry of a new dwarf nova V466 And, discovered during its superoutburst on Sept. 1.6, 2008 and classified as a WZ Sge-type object. In the first 11 days of the superoutburst, the early superhumps with the period of 0.056383^d were found. In days 13 — 23 of the superoutburst, the ordinary superhumps with the period of 0.05713^d were exposed. They were replaced by late superhumps with the period of 0.056^d in days 24 — 33 of the superoutburst. After one month, the dwarf nova returned to its pre-outburst state. A list of known WZ Sge-type dwarf novae, including suspected ones, is presented. We determined a mean value of superhump period excess for WZ Sge-type objects as ε=0.019±0.003. The multicolour photometry of the field stars enables us to conclude that there is no appreciable interstellar extinction in the direction of V466 And.