Table 3
Mean power-law spectral indices in HE, VHE and VHE corrected for EBL domains.
| Type | HE Mean | VHE Mean | VHE EBL-corrected Mean | z | Number of source |
|---|---|---|---|---|---|
| BL Lac | 1.83 ± 0.16 | 3.25 ± 0.53 | 2.16 ± 0.47 | [0.08–0.433] | 18 |
| Starburst | 2.14 ± 0.05 | 2.43 ± 0.16 | 2.34 ± 0.17 | 0.000864 | 1 |
| FSRQ | 2.37 ± 0.01 | 4.11 ± 0.44 | 2.16 ± 0.50 | 0.361 | 1 |
| RG | 2.20 ± 0.35 | 2.62 ± 0.59 | 2.43 ± 0.13 | [0.00183–0.05486] | 3 (†) |
Notes. First column is the mean power-law spectral indices in HE (taken from the 4FGL), second and third columns are VHE and VHE corrected for EBL. Value are given for each class of blazars present in the HEGS catalogue. The standard deviation of the distributions are reported. For the starburst and FSRQ, we report the statistical error. The range of redshifts, z, is also given and the number of sources in the sample are given in the last two columns. (†)PKS 0625-35 is included in this list.
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