%0 Journal Article %1 Foschini2009 %A Foschini, L. %A for the Fermi/LAT Collaboration, %A Ghisellini, G. %A Maraschi, L. %A Tavecchio, F. %A Angelakis, E. %D 2009 %K FERMI Seyfert-1 gamma-ray jets relativistic %T Fermi/LAT discovery of gamma-ray emission from a relativistic jet in the narrow-line Seyfert 1 quasar PMN J0948+0022 %U http://arxiv.org/abs/0908.3313 %X We report the discovery by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope of high-energy gamma-ray emission from the peculiar quasar PMN J0948+0022 (z=0.585+/-0.001). Contrary to the expectations, the optical spectrum of this quasar shows only narrow lines FWHM(Hbeta) ~ 1500 km/s and the typical characteristics of narrow-line Seyfert 1 type galaxies. However, the strong radio emission and the flat spectrum suggest the presence of a relativistic jet, which can now be confirmed by the detection of MeV-GeV photons. PMN J0948+0022 is therefore the first radio-loud narrow-line Seyfert 1 quasar to be detected at gamma-rays and the third type of gamma-ray emitting AGN, after blazars and radiogalaxies.

@article{Foschini2009, abstract = { We report the discovery by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope of high-energy gamma-ray emission from the peculiar quasar PMN J0948+0022 (z=0.585+/-0.001). Contrary to the expectations, the optical spectrum of this quasar shows only narrow lines [FWHM(Hbeta) ~ 1500 km/s] and the typical characteristics of narrow-line Seyfert 1 type galaxies. However, the strong radio emission and the flat spectrum suggest the presence of a relativistic jet, which can now be confirmed by the detection of MeV-GeV photons. PMN J0948+0022 is therefore the first radio-loud narrow-line Seyfert 1 quasar to be detected at gamma-rays and the third type of gamma-ray emitting AGN, after blazars and radiogalaxies. }, added-at = {2009-08-26T01:06:44.000+0200}, author = {Foschini, L. and for the Fermi/LAT Collaboration and Ghisellini, G. and Maraschi, L. and Tavecchio, F. and Angelakis, E.}, biburl = {https://www.bibsonomy.org/bibtex/2a23fb37d02d92518e48763fd85d1025b/astravinsky}, description = {Fermi/LAT discovery of gamma-ray emission from a relativistic jet in the narrow-line Seyfert 1 quasar PMN J0948+0022}, interhash = {1f64bbccc8e57c55fee4ec2094c33c16}, intrahash = {a23fb37d02d92518e48763fd85d1025b}, keywords = {FERMI Seyfert-1 gamma-ray jets relativistic}, note = {cite arxiv:0908.3313 Comment: 6 pages, 2 figures. Proceedings of the conference "Accretion and ejection in AGN: a global view" (Como, 22-26 June 2009)}, timestamp = {2009-08-26T01:06:44.000+0200}, title = {Fermi/LAT discovery of gamma-ray emission from a relativistic jet in the narrow-line Seyfert 1 quasar PMN J0948+0022}, url = {http://arxiv.org/abs/0908.3313}, year = 2009 }