The MHz-peaked radio spectrum of the unusual<i>γ</i>-ray source PMN J1603–4904
The MHz-peaked radio spectrum of the unusual<i>γ</i>-ray source PMN J1603–4904
Context. The majority of bright extragalactic gamma-ray sources are blazars. Only a few radio galaxies have been detected by Fermi/LAT. Recently, the GHz-peaked spectrum source PKS 1718-649 was confirmed to be gamma-ray bright, providing further evidence for the existence of a population of gamma-ray loud, compact radio galaxies. A spectral …