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Table 1:

Accuracy $\sigma _{\Delta z/(1+z)}$ of the supernova photometric redshift ${z_{\rm pho}}$.
  Simulation Data
Performance     Spec. Ia All Ia Spec. Ia All Ia All Ia
criteria ${z_{\rm pho}}$a ${z_{\rm pho}}$b ${z_{\rm pho}}$a ${z_{\rm pho}}$a ${z_{\rm pho}}$b ${z_{\rm pho}}$b $z_{\rm gal}$
  (1) (2) (3) (4) (5) (6) (7)
$\sigma _{\Delta z/(1+z)}$for z<0.45 0.006 0.006 0.018 0.019 0.014 0.016 0.031
$\sigma _{\Delta z/(1+z)}$for z>0.45 0.029 0.027 0.024 0.027 0.020 0.025 0.037
Outlier rate $\eta$ 2.5% 1.0% 2.0% 3.1% 0.4% 1.4% 5.5%

Notes. Columns 1 and 2 are for simulated events, Cols. 3 to 6 for data. For comparison, Col. 7 indicates the accuracy of the photometric redshift of the host galaxy $z_{\rm gal}$. The data sample contains 57 objects at ${z_{\rm spe}}<0.45$ of which 50 are spectroscopically confirmed, and 232 at ${z_{\rm spe}}>0.45$ including 191 spectroscopically confirmed SNe Ia. Superscript (b)  if bounds and prior on redshift used (as explained in Sect. 3), (a) otherwise.


Source LaTeX | All tables | In the text

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