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Table 1.
Main properties of the Sy galaxies used in this work.
| Name | Spectral | DL | log L14 − 195 keV | log  |
|---|---|---|---|---|
| type | (Mpc) | (erg s−1) | (cm−2) | |
| NGC 6552 | Sy2 | 118.0 | 43.65 | 24.02 |
| NGC 7319 | Sy2 | 96.1 | 43.76 | 23.82 |
| NGC 7469 | Sy1.5 | 67.2 | 43.59 | 20.53 |
Notes. The spectral types were taken from Véron-Cetty & Véron (2006). The luminosity distance and spatial scale were calculated using a cosmology with H0 = 70 km s−1 Mpc−1, Ωm = 0.3, and ΩΛ = 0.7. The intrinsic L14 − 195 keV and 
were taken from Ricci et al. (2017).
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