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Title:
Discovery of a New Deeply Eclipsing SU UMa-Type Dwarf Nova, IY UMa (= TmzV 85)
Authors:
Uemura, Makoto; Kato, Taichi; Matsumoto, Katsura; Takamizawa, Kesao; Schmeer, Patrick; Jensen, Lasse Teist; Vanmunster, Tonny; Novák, Rudolf; Martin, Brian; Pietz, Jochen; Buczynski, Denis; Kinnunen, Timo; Moilanen, Marko; Oksanen, Arto; Cook, Lewis M.; Watanabe, Tsutomu; Maehara, Hiroyuki; Itoh, Hiroshi
Affiliation:
AA(Department of Astronomy, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502; (MU):), AB(Department of Astronomy, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502; (MU):), AC(Department of Astronomy, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502), AD(Oohinata 65-1, Saku-machi, Nagano, 384-0502), AE(Bischmisheim, Am Probstbaum 10, 66132 Saarbrücken, Germany), AF(Center for Backyard Astrophysics (Denmark), Sndervej 38, DK-8350 Hundslund, Denmark), AG(Center for Backyard Astrophysics (Belgium), Walhostraat 1A, B-3401 Landen, Belgium), AH(Nicholas Copernicus Observatory, Kraví{ hora 2, Brno 616 00, Czech Republic), AI(Center for Backyard Astrophysics (Alberta), The King's University College, 9125-50th Street, Edmonton, Alberta, Canada), AJ(Rostocker Str. 62, 50374 Erftstadt, Germany), AK(Conder Brow Observatory, Littlefell Lane, Lancaster LA1 IXD, England, UK), AL(Sinirinnantie 16, SF-02660 Espoo, Finland), AM(Sinirinnantie 16, SF-02660 Espoo, Finland), AN(Nyrola Observatory, Jyvaskylan Sirius ry, Kyllikinkatu 1, FIN-40100 Jyvaskyla, Finland), AO(Center for Backyard Astrophysics (California), 1730 Helix Ct. Concord, California 94518, USA), AP(VSOLJ, 117 Shirao dormitory, 1414 Oonakazato, Shizuoka 418-0044), AQ(VSOLJ, Namiki 1-13-4, Kawaguchi, Saitama 332-0034), AR(VSOLJ, Nishiteragata-cho 1001-105, Hachioji, Tokyo 192-0153)
Publication:
Publ. of the Astronomical Society of Japan, v.52, p.L9. (PASJ Homepage)
Publication Date:
04/2000
Origin:
PASJ
PASJ Keywords:
ACCRETION DISKS, BINARIES: ECLIPSING, STARS: CATACLYSMIC VARIABLES, STARS: INDIVIDUAL (IY UMA)
Bibliographic Code:
2000PASJ...52L...9U

Abstract

We discovered a new deeply eclipsing SU UMa-type dwarf nova, IY UMa, which experienced a superoutburst in 2000 January. Our monitoring revealed two distinct outbursts, which suggest a superoutburst interval of ~ 800 d, or its half, and an outburst amplitude of 5.4 mag. From time-series photometry during the superoutburst, we determined a superhump and orbital period of 0.07588 d and 0.0739132 d, respectively.

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