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Fig. 3


SN2014J signal intensity variations for the 847 keV line (center) and the 1238 keV line (right) as seen in the four epochs of our observations, and analyzed with 10 keV energy bins. The 1238 keV fluxes have been scaled by the 56Co decay branching ratio of 0.68 for equal-intensity appearance. Clear and significant emission is seen in the lower energy band (left and center) through a dominating broad line attributed to 847 keV emission, the emission in the high-energy band in the 1238 keV line appears consistent and weaker, as expected from the branching ratio of 0.68 (right). Fitted line details are discussed in the text. For the 847 keV line, in addition a high-spectral resolution analysis is shown at 2 keV energy bin width (left), confirming the irregular, non-broad-Gaussian features in more detail.

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