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Itagaki, K. L. Page, K. M. Lau, K. Nakajima, K. Nishiyama, M. F. Bode, M. Henze, M. Hernanz, M. J. Darnley, M. Kato, M. M. Shara, M. Watanabe, N. Gehrels, N. Kawai, P. Boumis, P. Godon, P. Rodriguez-Gil, R. Hounsell, R. Quimby, S. C. Williams, S. Fabrika, S. Kiyota, T. Chen, T. J. O'Brien, V. A. R. M. Ribeiro, V. P. Goranskij, X. Gao, Y. Sano, Z. Xu","submitted_at":"2016-07-27T13:21:45Z","abstract_excerpt":"The Andromeda Galaxy recurrent nova M31N 2008-12a had been observed in eruption ten times, including yearly eruptions from 2008-2014. With a measured recurrence period of $P_\\mathrm{rec}=351\\pm13$ days (we believe the true value to be half of this) and a white dwarf very close to the Chandrasekhar limit, M31N 2008-12a has become the leading pre-explosion supernova type Ia progenitor candidate. 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