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Pumo, M. Nicholl, M. Pawlak, M. Sullivan, M. Turatto, N. Elias-Rosa, O. Yaron, P. Mr\\'oz, P. Pietrukowicz, R. Poleski, S. Benetti, S. J. Smartt, S. Koz{\\l}owski, S. Valenti, T. J. Moriya, T.-W. Chen, Z. Kostrzewa-Rutkowska","submitted_at":"2017-09-29T16:13:14Z","abstract_excerpt":"We present our study of OGLE-2014-SN-073, one of the brightest Type II SN ever discovered, with an unusually broad lightcurve combined with high ejecta velocities. From our hydrodynamical modelling we infer a remarkable ejecta mass of $60^{+42}_{-16}$~M$_\\odot$, and a relatively high explosion energy of $12.4^{+13.0}_{-5.9} \\times10^{51}$~erg. We show that this object belongs, with a very small number of other hydrogen-rich SNe, to an energy regime that is not explained by standard core-collapse (CC) neutrino-driven explosions. 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Gal-Yam, A. Jerkstrand, A. Pastorello, A. Udalski, C. Inserra, C. McCully, D. A. Howell, D. R. Young, D. Skowron, E. Cappellaro, E. Kankare, F. Taddia, G. Dimitriadis, G. Terreran, I. Soszy\\'nski, J. P. Anderson, J. Skowron, J. Sollerman, K. Maguire, K. Ulaczyk, K. W. Smith, L. Dessart, {\\L}. Wyrzykowski, L. Zampieri, M. Della Valle, M. Fraser, M. K. Szyma\\'nski, M. L. Pumo, M. Nicholl, M. Pawlak, M. Sullivan, M. Turatto, N. Elias-Rosa, O. Yaron, P. Mr\\'oz, P. Pietrukowicz, R. Poleski, S. Benetti, S. J. Smartt, S. Koz{\\l}owski, S. Valenti, T. J. Moriya, T.-W. Chen, Z. Kostrzewa-Rutkowska","submitted_at":"2017-09-29T16:13:14Z","abstract_excerpt":"We present our study of OGLE-2014-SN-073, one of the brightest Type II SN ever discovered, with an unusually broad lightcurve combined with high ejecta velocities. 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