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Table 1

Photon indices of the GeV- and TeV-γ-ray spectrum for the sources used in Fig. 6.

Source ΓTeV ΓGeV1 z Reference

MAGIC 1ES 1215+303 2.96 ± 0.14 2.0 ± 0.2 0.130 Aleksić et al. (2012a)
NGC 1275 4.1 ± 0.7 2.17 ± 0.05 0.018 Aleksić et al. (2012b)
Mrk 421 2.48 ± 0.03 1.75 ± 0.03 0.031 Abdo et al. (2011b)
PKS 1222+21 3.75 ± 0.27 1.95 ± 0.21 0.43 Aleksić et al. (2011a)
3C 279 3.1 ± 1.1 2.3 ± 0.1 0.536 Abdo et al. (2009b); Aleksić et al. (2011b)
IC 310 2.00 ± 0.14 1.58 ± 0.25 0.019 Aleksić et al. (2010)
Mrk 501 2.51 ± 0.05 1.78 ± 0.032 0.034 Abdo et al. (2011a)

H.E.S.S. 1ES 0414+009 3.45 ± 0.25 1.85 ± 0.18 0.287 Abramowski et al. (2012)
PKS 2005-489 3.20 ± 0.16 1.79 ± 0.07 0.071 Abramowski et al. (2011)
PKS 0447-439 3.89 ± 0.37 1.85 ± 0.035 0.23 Abramowski et al. (2013)

VERITAS RGB J0710+591 2.69 ± 0.26 1.46 ± 0.17 0.125 Acciari et al. (2010b)
PKS 1424+240 3.8 ± 0.5 1.8 ± 0.07 unknown Acciari et al. (2010a)
RJX 0648.7+516 4.4 ± 0.8 1.89 ± 0.1 0.179 Aliu et al. (2011)
RBS 0413 3.18 ± 0.68 1.57 ± 0.12 0.19 Aliu et al. (2012)

Notes.Their redshifts and the reference papers are also listed.

(1)

All observations in the GeV energy band are made with the Fermi satellite. For the specific energy range where the photon index is calculated, see corresponding reference.

(2)

Photon index of the average GeV spectrum.

(3)

Although the redshift of this source is still disputed, we use the value 0.2 that is in agreement with most of the present estimates in the literature.

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