Limits on the scaling parameter α of the optical depths in various EBL models.
|Model||α (PWL)||α (all)|
|Franceschini et al. (2008)||1.19 ± 0.42stat ± 0.25syst||<2.8|
|Finke et al. (2010)||0.91 ± 0.32stat ± 0.19syst||< 2.1|
|Domínguez et al. (2011)||1.19 ± 0.42stat ± 0.25syst||< 2.7|
|Gilmore et al. (2012)||< 2.1|
|Inoue et al. (2013)||< 2.2|
Notes. The second column specifies the limit for the intrinsic spectral model with the highest peak probability from the assumed phenomenological spectral shapes (Eqs. (3)–(6)). For all the EBL models it is the power law shape. The last column specifies the 95% C.L. limit allowing all considered spectral shapes and 15% energy scale systematic uncertainty.
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