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FERMI/LARGE AREA TE...
FERMI/LARGE AREA TELESCOPE DISCOVERY OF GAMMA-RAY EMISSION FROM A RELATIVISTIC JET IN THE NARROW-LINE QUASAR PMN J0948+0022
- Article/chapterEnglish2009
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LIBRIS-ID:oai:DiVA.org:hik-2824
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https://urn.kb.se/resolve?urn=urn:nbn:se:hik:diva-2824URI
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https://doi.org/10.1088/0004-637X/699/2/976DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-28883URI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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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 = 0.5846). The optical spectrum of this object exhibits rather narrow H beta (FWHM(H beta) similar to 1500 km s(-1)), weak forbidden lines, and is therefore classified as a narrow-line type I quasar. This class of objects is thought to have relatively small black hole mass and to accrete at a high Eddington ratio. The radio loudness and variability of the compact radio core indicate the presence of a relativistic jet. Quasi-simultaneous radio/optical/X-ray and gamma-ray observations are presented. Both radio and gamma-ray emissions (observed over five months) are strongly variable. The simultaneous optical and X-ray data from Swift show a blue continuum attributed to the accretion disk and a hard X-ray spectrum attributed to the jet. The resulting broadband spectral energy distribution (SED) and, in particular, the gamma-ray spectrum measured by Fermi are similar to those of more powerful Flat-Spectrum Radio Quasars (FSRQs). A comparison of the radio and gamma-ray characteristics of PMN J0948+0022 with the other blazars detected by LAT shows that this source has a relatively low radio and gamma-ray power with respect to other FSRQs. The physical parameters obtained from modeling the SED also fall at the low power end of the FSRQ parameter region discussed in Celotti & Ghisellini. We suggest that the similarity of the SED of PMN J0948+0022 to that of more massive and more powerful quasars can be understood in a scenario in which the SED properties depend on the Eddington ratio rather than on the absolute power.
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Added entries (persons, corporate bodies, meetings, titles ...)
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Ackermann, M.
(author)
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Ajello, M.
(author)
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Axelsson, M.Stockholms universitet,Institutionen för astronomi
(author)
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Baldini, L.
(author)
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Ballet, J.
(author)
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Barbiellini, G.
(author)
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Bastieri, D.
(author)
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Battelino, M.
(author)
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Baughman, B. M.
(author)
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Bechtol, K.
(author)
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Bellazzini, R.
(author)
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Bloom, E. D.
(author)
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Bonamente, E.
(author)
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Borgland, A. W.
(author)
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Bregeon, J.
(author)
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Brez, A.
(author)
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Brigida, M.
(author)
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Bruel, P.
(author)
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Caliandro, G. A.
(author)
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Cameron, R. A.
(author)
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Caraveo, P. A.
(author)
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Casandjian, J. M.
(author)
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Cavazzuti, E.
(author)
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Cecchi, C.
(author)
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Chekhtman, A.
(author)
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Cheung, C. C.
(author)
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Chiang, J.
(author)
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Ciprini, S.
(author)
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Claus, R.
(author)
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Cohen-Tanugi, J.
(author)
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Collmar, W.
(author)
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Conrad, J.Stockholms universitet,Fysikum
(author)
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Costamante, L.
(author)
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Dermer, C. D.
(author)
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de Angelis, A.
(author)
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de Palma, F.
(author)
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Digel, S. W.
(author)
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Silva, E. D. E.
(author)
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Drell, P. S.
(author)
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Dubois, R.
(author)
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Dumora, D.
(author)
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Farnier, C.
(author)
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Favuzzi, C.
(author)
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Focke, W. B.
(author)
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Foschini, L.
(author)
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Frailis, M.
(author)
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Fuhrmann, L.
(author)
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Fukazawa, Y.
(author)
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Funk, S.
(author)
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Fusco, P.
(author)
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Gargano, F.
(author)
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Gehrels, N.
(author)
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Germani, S.
(author)
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Giebels, B.
(author)
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Giglietto, N.
(author)
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Giordano, F.
(author)
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Giroletti, M.
(author)
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Glanzman, T.
(author)
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Grenier, I. A.
(author)
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Grondin, M. H.
(author)
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Grove, J. E.
(author)
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Guillemot, L.
(author)
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Guiriec, S.
(author)
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Hanabata, Y.
(author)
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Harding, A. K.
(author)
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Hartman, R. C.
(author)
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Hayashida, M.
(author)
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Hays, E.
(author)
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Hughes, R. E.
(author)
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Johannesson, G.
(author)
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Johnson, A. S.
(author)
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Johnson, R. P.
(author)
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Johnson, W. N.
(author)
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Kamae, T.
(author)
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Katagiri, H.
(author)
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Kataoka, J.
(author)
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Kerr, M.
(author)
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Knodlseder, J.
(author)
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Kuehn, F.
(author)
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Kuss, M.
(author)
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Lande, J.
(author)
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Latronico, L.
(author)
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Lemoine-Goumard, M.
(author)
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Longo, F.
(author)
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Loparco, F.
(author)
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Lott, B.
(author)
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Lovellette, M. N.
(author)
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Lubrano, P.
(author)
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Madejski, G. M.
(author)
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Makeev, A.
(author)
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Max-Moerbeck, W.
(author)
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Mazziotta, M. N.
(author)
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McConville, W.
(author)
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McEnery, J. E.
(author)
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Meurer, C.Stockholms universitet,Fysikum
(author)
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Michelson, P. F.
(author)
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Mitthumsiri, W.
(author)
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Mizuno, T.
(author)
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Monte, C.
(author)
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Monzani, M. E.
(author)
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Morselli, A.
(author)
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Moskalenko, I. V.
(author)
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Murgia, S.
(author)
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Nolan, P. L.
(author)
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Norris, J. P.
(author)
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Nuss, E.
(author)
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Ohsugi, T.
(author)
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Omodei, N.
(author)
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Orlando, E.
(author)
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Ormes, J. F.
(author)
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Paneque, D.
(author)
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Panetta, J. H.
(author)
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Parent, D.
(author)
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Pavlidou, V.
(author)
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Pearson, T. J.
(author)
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Pepe, M.
(author)
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Pesce-Rollins, M.
(author)
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Piron, F.
(author)
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Porter, T. A.
(author)
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Raino, S.
(author)
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Rando, R.
(author)
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Razzano, M.
(author)
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Readhead, A.
(author)
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Reimer, A.
(author)
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Reimer, O.
(author)
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Reposeur, T.
(author)
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Richards, J. L.
(author)
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Ritz, S.
(author)
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Rodriguez, A. Y.
(author)
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Romani, R. W.
(author)
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Ryde, F.
(author)
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Sadrozinski, H. F. W.
(author)
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Sambruna, R.
(author)
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Sanchez, D.
(author)
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Sander, A.
(author)
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Parkinson, P. M. S.
(author)
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Scargle, J. D.
(author)
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Schalk, T. L.
(author)
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Sgro, C.
(author)
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Smith, D. A.
(author)
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Spandre, G.
(author)
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Spinelli, P.
(author)
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Starck, J. L.
(author)
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Stevenson, M.
(author)
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Strickman, M. S.
(author)
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Suson, D. J.
(author)
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Tagliaferri, G.
(author)
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Takahashi, H.
(author)
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Ylinen, T.Högskolan i Kalmar,Naturvetenskapliga institutionen(Swepub:lnu)eylto
(author)
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Thayer, J. G.
(author)
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Thompson, D. J.
(author)
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Tibaldo, L.
(author)
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Tibolla, O.
(author)
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Torres, D. F.
(author)
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Tosti, G.
(author)
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Tramacere, A.
(author)
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Uchiyama, Y.
(author)
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Usher, T. L.
(author)
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Vilchez, N.
(author)
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Vitale, V.
(author)
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Waite, A. P.
(author)
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Winer, B. L.
(author)
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Wood, K. S.
(author)
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Ylinen, T.Högskolan i Kalmar,Naturvetenskapliga institutionen(Swepub:lnu)eylto
(author)
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Zensus, J. A.
(author)
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Ziegler, M.
(author)
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Ghisellini, G.
(author)
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Maraschi, L.
(author)
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Tavecchio, F.
(author)
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Angelakis, E.
(author)
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Stockholms universitetInstitutionen för astronomi
(creator_code:org_t)
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In:Astrophysical Journal699:2, s. 976-9840004-637X1538-4357
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- By the author/editor
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Abdo, A. A.
-
Ackermann, M.
-
Ajello, M.
-
Axelsson, M.
-
Baldini, L.
-
Ballet, J.
-
show more...
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Barbiellini, G.
-
Bastieri, D.
-
Battelino, M.
-
Baughman, B. M.
-
Bechtol, K.
-
Bellazzini, R.
-
Bloom, E. D.
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Bonamente, E.
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Borgland, A. W.
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Bregeon, J.
-
Brez, A.
-
Brigida, M.
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Bruel, P.
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Caliandro, G. A.
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Cameron, R. A.
-
Caraveo, P. A.
-
Casandjian, J. M ...
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Cavazzuti, E.
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Cecchi, C.
-
Chekhtman, A.
-
Cheung, C. C.
-
Chiang, J.
-
Ciprini, S.
-
Claus, R.
-
Cohen-Tanugi, J.
-
Collmar, W.
-
Conrad, J.
-
Costamante, L.
-
Dermer, C. D.
-
de Angelis, A.
-
de Palma, F.
-
Digel, S. W.
-
Silva, E. D. E.
-
Drell, P. S.
-
Dubois, R.
-
Dumora, D.
-
Farnier, C.
-
Favuzzi, C.
-
Focke, W. B.
-
Foschini, L.
-
Frailis, M.
-
Fuhrmann, L.
-
Fukazawa, Y.
-
Funk, S.
-
Fusco, P.
-
Gargano, F.
-
Gehrels, N.
-
Germani, S.
-
Giebels, B.
-
Giglietto, N.
-
Giordano, F.
-
Giroletti, M.
-
Glanzman, T.
-
Grenier, I. A.
-
Grondin, M. H.
-
Grove, J. E.
-
Guillemot, L.
-
Guiriec, S.
-
Hanabata, Y.
-
Harding, A. K.
-
Hartman, R. C.
-
Hayashida, M.
-
Hays, E.
-
Hughes, R. E.
-
Johannesson, G.
-
Johnson, A. S.
-
Johnson, R. P.
-
Johnson, W. N.
-
Kamae, T.
-
Katagiri, H.
-
Kataoka, J.
-
Kerr, M.
-
Knodlseder, J.
-
Kuehn, F.
-
Kuss, M.
-
Lande, J.
-
Latronico, L.
-
Lemoine-Goumard, ...
-
Longo, F.
-
Loparco, F.
-
Lott, B.
-
Lovellette, M. N ...
-
Lubrano, P.
-
Madejski, G. M.
-
Makeev, A.
-
Max-Moerbeck, W.
-
Mazziotta, M. N.
-
McConville, W.
-
McEnery, J. E.
-
Meurer, C.
-
Michelson, P. F.
-
Mitthumsiri, W.
-
Mizuno, T.
-
Monte, C.
-
Monzani, M. E.
-
Morselli, A.
-
Moskalenko, I. V ...
-
Murgia, S.
-
Nolan, P. L.
-
Norris, J. P.
-
Nuss, E.
-
Ohsugi, T.
-
Omodei, N.
-
Orlando, E.
-
Ormes, J. F.
-
Paneque, D.
-
Panetta, J. H.
-
Parent, D.
-
Pavlidou, V.
-
Pearson, T. J.
-
Pepe, M.
-
Pesce-Rollins, M ...
-
Piron, F.
-
Porter, T. A.
-
Raino, S.
-
Rando, R.
-
Razzano, M.
-
Readhead, A.
-
Reimer, A.
-
Reimer, O.
-
Reposeur, T.
-
Richards, J. L.
-
Ritz, S.
-
Rodriguez, A. Y.
-
Romani, R. W.
-
Ryde, F.
-
Sadrozinski, H. ...
-
Sambruna, R.
-
Sanchez, D.
-
Sander, A.
-
Parkinson, P. M. ...
-
Scargle, J. D.
-
Schalk, T. L.
-
Sgro, C.
-
Smith, D. A.
-
Spandre, G.
-
Spinelli, P.
-
Starck, J. L.
-
Stevenson, M.
-
Strickman, M. S.
-
Suson, D. J.
-
Tagliaferri, G.
-
Takahashi, H.
-
Ylinen, T.
-
Thayer, J. G.
-
Thompson, D. J.
-
Tibaldo, L.
-
Tibolla, O.
-
Torres, D. F.
-
Tosti, G.
-
Tramacere, A.
-
Uchiyama, Y.
-
Usher, T. L.
-
Vilchez, N.
-
Vitale, V.
-
Waite, A. P.
-
Winer, B. L.
-
Wood, K. S.
-
Zensus, J. A.
-
Ziegler, M.
-
Ghisellini, G.
-
Maraschi, L.
-
Tavecchio, F.
-
Angelakis, E.
-
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