SN2014J signal intensity variations for the 847 keV line in two different time resolutions. The 4-epoch results are consistent with 11-epoch analysis, both showing an initial rise and late decline of ⁵⁶Co decay line intensity, with a maximum at 60–100 days after explosion. Shown are also several candidate source models from The & Burrows (2014), fitted in intensity and thus determining ⁵⁶Ni masses for each such model. The best-fitting model is shown as a continuous thick line.