Early 56Ni decay gamma rays from SN2014J suggest an unusual explosion. - Diehl, Roland; Siegert, Thomas; Hillebrandt, Wolfgang; Grebenev, Sergei A.; Greiner, Jochen; Krause, Martin; Kromer, Markus; Maeda, Keiichi; Röpke, Friedrich; Taubenberger, Stefan (Science (pre-March 2025), 2014)