ASI SponsorOrienti, M.M.OrientiDAmmando, F.F.DAmmandoLarsson, J.J.Larsson2020-09-172020-09-172015-09-01https://hdl.handle.net/20.500.13025/4608We report results on multiband observations from radio to γ-rays of the two radio-loud narrow-line Seyfert 1 (NLSy1) galaxies PKS 2004−447 and J1548+3511. Both sources show a core–jet structure on parsec scale, while they are unresolved at the arcsecond scale. The high core dominance and the high variability brightness temperature make these NLSy1 galaxies good γ-ray source candidates. Fermi-Large Area Telescope detected γ-ray emission only from PKS 2004−447, with a γ-ray luminosity comparable to that observed in blazars. No γ-ray emission is observed for J1548+3511. Both sources are variable in X-rays. J1548+3511 shows a hardening of the spectrum during high activity states, while PKS 2004−447 has no spectral variability. A spectral steepening likely related to the soft excess is hinted below 2 keV for J1548+3511, while the X-ray spectra of PKS 2004−447 collected by XMM–Newton in 2012 are described by a single power law without significant soft excess. No additional absorption above the Galactic column density or the presence of an Fe line is detected in the X-ray spectra of both sources.Key wordsgalaxies: active galaxies: Seyfert gamma-rays: general radio continuum: generalArticle Journal10.1093/mnras/stv1845http://mnras.oxfordjournals.org/content/453/4/4037.abstract570661836c5e1b0ece3cd9ad