Table 3

Spectral modelling of the data sets used to derive the likelihood profiles.

Data set Spectral model χ2(α0)/d.o.f.

Mrk 421 (1) ELP 21.5/31
Mrk 421 (2) ELP 46.8/30
Mrk 421 (3) ELP 34.8/28
PKS 2005-489 (1) LP 49.5/60
PKS 2005-489 (2) LP 31.8/46
PKS 2155-304 (2008) ELP 21.9/37
PKS 2155-304 (1) PWL 32.3/31
PKS 2155-304 (2) SEPWL 25.3/28
PKS 2155-304 (3) SEPWL 35.2/31
PKS 2155-304 (4) SEPWL 19.1/21
PKS 2155-304 (5) SEPWL 24.3/27
PKS 2155-304 (6) LP 29.2/21
PKS 2155-304 (7) SEPWL 13.6/13
1ES 0229+200 PWL 60.1/60
H 2356-309 LP 70.2/61
1ES 1101-232 PWL 62.6/69
1ES 0347-121 ELP 31.7/35

Notes. The spectral models (see Sect. 2.3) are given in Col. 2, where the acronyms PWL, LP, EPWL, ELP, and SEPWL are explained in Table 2. The χ2 for the best fit EBL optical depth normalization α0 and the number of degrees of freedom d.o.f. are given in Col. 3.

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