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Elias-Rosa, P. Nugent, P. Ochner, P. R. Wo\\'zniak, S. Benetti, S. Fabrika, S. G. Djorgovski, S. Mattila, S. Schulze, S. Taubenberger, S. Valenti, T. Fatkhullin, T. Kangas, Umaa D. Rebbapragada, V. P. Goranskij","submitted_at":"2016-03-31T20:00:02Z","abstract_excerpt":"We report photometric and spectroscopic observations of the optical transient LSQ13zm. Historical data reveal the presence of an eruptive episode (that we label as `2013a') followed by a much brighter outburst (`2013b') three weeks later, that we argue to be the genuine supernova explosion. This sequence of events closely resemble those observed for SN2010mc and (in 2012) SN2009ip. 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