Table 12
Drift in the parameters with respect to the C11 analysis.
| Ωm | α | β |
|
ΔM | χ2/ d.o.f. | |
|
|
||||||
| C11 Combined (stat+sys) | 0.228 ± 0.038 | 1.434 ± 0.093 | 3.272 ± 0.100 | −19.16 ± 0.03 | −0.047 ± 0.023 | 428.8/467 |
| C11 SALT2 (stat+sys) | 0.249 ± 0.043 | 1.708 ± 0.156 | 3.306 ± 0.109 | −19.15 ± 0.03 | −0.044 ± 0.024 | 395.1/468 |
| C11 SiFTO (stat+sys) | 0.225 ± 0.038 | 1.360 ± 0.072 | 3.401 ± 0.111 | −19.15 ± 0.03 | −0.047 ± 0.022 | 439.1/463 |
| C11 SALT2 (stat) | 0.246 ± 0.018 | 1.367 ± 0.071 | 3.133 ± 0.087 | −19.15 ± 0.02 | −0.065 ± 0.015 | 484.9/468 |
| C11 SiFTO (stat) | 0.272 ± 0.016 | 1.366 ± 0.059 | 3.049 ± 0.078 | −19.12 ± 0.01 | −0.064 ± 0.013 | 509.8/463 |
|
|
||||||
| C11-reanalized (stat only) | 0.230 ± 0.018 | 0.140 ± 0.008 | 2.771 ± 0.085 | −19.06 ± 0.02 | −0.053 ± 0.016 | 427.3/453 |
| C11-recalibrated (stat only) | 0.291 ± 0.022 | 0.136 ± 0.009 | 2.907 ± 0.095 | −19.02 ± 0.02 | −0.061 ± 0.017 | 407.8/453 |
|
|
||||||
| JLA (stat) | 0.289 ± 0.018 | 0.140 ± 0.006 | 3.139 ± 0.072 | −19.04 ± 0.01 | −0.060 ± 0.012 | 717.3/735 |
Notes. The difference in α between the C11 and JLA samples is due to a different parameterization of light-curve shapes: while for the C11 sample, a stretch parameter s is reported, we use the SALT2 X1 parameter which is roughly 10 × (s − 1). The high value of α in the “SALT2 (stat)” case was due to a convergence problem in the computation of a covariance matrix. We confirmed that fixing this problem did not change the recovered values of Ωm.
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