SIMBAD references

Active galactic nuclei and gamma-ray bursts (GRBs) are powerful astrophysical events with relativistic jets. In this Letter, the broadband spectral properties of GRBs and well-observed blazars are compared. The distribution of GRBs is consistent with the well-known blazar sequence including the νL_ν(5 GHz) - α_RX and νL_ν(5 GHz) - ν_peakcorrelations, where α_RXis defined as the broadband spectral slope in radio-to-X-ray bands, and ν_peakis defined as the spectral peak frequency. Moreover, GRBs occupy the low radio luminosity end of these sequences. These two correlations suggest that GRBs could have a radiation process, i.e., synchrotron radiation, similar to blazars both in the prompt emission and afterglow phases.