A remarkable recurrent nova in M 31: The predicted 2014 outburst in X-rays with Swift M. Henze, J.-U. Ness, M. J. Darnley, M. F. Bode, S. C. Williams, A. W. Shafter, G. Sala, M. Kato, I. Hachisu and M. Hernanz A&A, 580 (2015) A46 Published online: 28 July 2015 DOI: 10.1051/0004-6361/201526028