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Table 4

56Ni mass fit results for different explosion models, as described in detail by The & Burrows (2014).

  100 keV band 20 keV band
Rank Model χ 2 M(56Ni) Model χ 2 M(56Ni) Model χ 2 M(56Ni)
1. hed8 25.07 0.46 ± 0.06 hed8 7.81 0.52 ± 0.12 W7 16.98 0.42 ± 0.07
2. w7dt 25.37 0.50 ± 0.06 w7dt 7.89 0.57 ± 0.13 det2 17.07 0.38 ± 0.06
3. W7A 25.57 0.51 ± 0.06 W7A 7.95 0.59 ± 0.13 m36 17.15 0.43 ± 0.07
4. hecd 25.61 0.52 ± 0.06 hecd 8.11 0.58 ± 0.13 dd202c 17.26 0.42 ± 0.07
5. hed6 26.22 0.50 ± 0.06 hed6 8.54 0.56 ± 0.13 W7E 17.29 0.43 ± 0.07
6. det2 27.84 0.50 ± 0.06 det2 9.35 0.55 ± 0.13 dd4 17.33 0.45 ± 0.07
7. w7dn 28.27 0.54 ± 0.07 w7dn 9.57 0.59 ± 0.14 w7dn 17.33 0.40 ± 0.06
8. W7E 29.48 0.56 ± 0.07 W7E 10.11 0.61 ± 0.15 det2e2 17.67 0.44 ± 0.07
9. m36 30.30 0.56 ± 0.07 m36 10.44 0.61 ± 0.15 hed6 17.73 0.37 ± 0.06
10. W7 30.52 0.54 ± 0.07 W7 10.50 0.59 ± 0.14 hecd 18.13 0.38 ± 0.06
11. dd202c 30.70 0.55 ± 0.07 dd202c 10.51 0.61 ± 0.15 hed8c 18.17 0.33 ± 0.05
12. dd4 32.72 0.57 ± 0.08 dd4 11.35 0.62 ± 0.15 w7dt 18.33 0.36 ± 0.06
13. det2e2 34.18 0.56 ± 0.07 det2e2 11.80 0.61 ± 0.15 W7A 18.40 0.38 ± 0.06
14. pdd54 38.84 0.56 ± 0.08 pdd54 13.52 0.61 ± 0.16 pdd14 18.74 0.46 ± 0.07
15. det2e6 50.75 0.72 ± 0.11 det2e6 17.80 0.78 ± 0.25 det2e6 22.94 0.66 ± 0.11
constant 35.20 0.30 ± 0.06 constant 8.48 0.41 ± 0.12 constant 26.86 0.24 ± 0.06
bgd only 90.92 – bgd only 27.87 – bgd only 57.33 –

Notes. We fit the light curves resulting from those models to our gamma-ray data. The fit quality can be seen from the χ2 values (for 9 degrees of freedom, except for the bgd-only case which has 10 d.o.f.). Fitted 56Ni masses are given in M⊙ with uncertainties, for the intensity variation time profile of the respective model. We compare results for three analysis approaches, fitting a single broad line (left), for taking the non-zero flux in a broad band (middle) (800–900 keV), and for taking nonzero flux in a band where the 56Co emission could be expected to appear (right) (840–860 keV).

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