Search: onr:"swepub:oai:DiVA.org:hik-2824" > FERMI/LARGE AREA TE...
Fältnamn | Indikatorer | Metadata |
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000 | 09488naa a2202449 4500 | |
001 | oai:DiVA.org:hik-2824 | |
003 | SwePub | |
008 | 100223s2009 | |||||||||||000 ||eng| | |
009 | oai:DiVA.org:su-28883 | |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:hik:diva-28242 URI |
024 | 7 | a https://doi.org/10.1088/0004-637X/699/2/9762 DOI |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-288832 URI |
040 | a (SwePub)lnud (SwePub)su | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a ref2 swepub-contenttype |
072 | 7 | a art2 swepub-publicationtype |
100 | 1 | a Abdo, A. A.4 aut |
245 | 1 0 | a FERMI/LARGE AREA TELESCOPE DISCOVERY OF GAMMA-RAY EMISSION FROM A RELATIVISTIC JET IN THE NARROW-LINE QUASAR PMN J0948+0022 |
264 | 1 | c 2009 |
338 | a print2 rdacarrier | |
520 | a 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. | |
650 | 7 | a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng |
650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
653 | a Fysik | |
653 | a Physics | |
653 | a galaxies: active | |
653 | a High energy astrophysics | |
653 | a Extragalactical astronomy | |
653 | a Astronomy | |
700 | 1 | a Ackermann, M.4 aut |
700 | 1 | a Ajello, M.4 aut |
700 | 1 | a Axelsson, M.u Stockholms universitet,Institutionen för astronomi4 aut |
700 | 1 | a Baldini, L.4 aut |
700 | 1 | a Ballet, J.4 aut |
700 | 1 | a Barbiellini, G.4 aut |
700 | 1 | a Bastieri, D.4 aut |
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700 | 1 | a Collmar, W.4 aut |
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700 | 1 | a Costamante, L.4 aut |
700 | 1 | a Dermer, C. D.4 aut |
700 | 1 | a de Angelis, A.4 aut |
700 | 1 | a de Palma, F.4 aut |
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700 | 1 | a Favuzzi, C.4 aut |
700 | 1 | a Focke, W. B.4 aut |
700 | 1 | a Foschini, L.4 aut |
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700 | 1 | a Giebels, B.4 aut |
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700 | 1 | a Glanzman, T.4 aut |
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700 | 1 | a Madejski, G. M.4 aut |
700 | 1 | a Makeev, A.4 aut |
700 | 1 | a Max-Moerbeck, W.4 aut |
700 | 1 | a Mazziotta, M. N.4 aut |
700 | 1 | a McConville, W.4 aut |
700 | 1 | a McEnery, J. E.4 aut |
700 | 1 | a Meurer, C.u Stockholms universitet,Fysikum4 aut |
700 | 1 | a Michelson, P. F.4 aut |
700 | 1 | a Mitthumsiri, W.4 aut |
700 | 1 | a Mizuno, T.4 aut |
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700 | 1 | a Morselli, A.4 aut |
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700 | 1 | a Murgia, S.4 aut |
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700 | 1 | a Nuss, E.4 aut |
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700 | 1 | a Omodei, N.4 aut |
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700 | 1 | a Ormes, J. F.4 aut |
700 | 1 | a Paneque, D.4 aut |
700 | 1 | a Panetta, J. H.4 aut |
700 | 1 | a Parent, D.4 aut |
700 | 1 | a Pavlidou, V.4 aut |
700 | 1 | a Pearson, T. J.4 aut |
700 | 1 | a Pepe, M.4 aut |
700 | 1 | a Pesce-Rollins, M.4 aut |
700 | 1 | a Piron, F.4 aut |
700 | 1 | a Porter, T. A.4 aut |
700 | 1 | a Raino, S.4 aut |
700 | 1 | a Rando, R.4 aut |
700 | 1 | a Razzano, M.4 aut |
700 | 1 | a Readhead, A.4 aut |
700 | 1 | a Reimer, A.4 aut |
700 | 1 | a Reimer, O.4 aut |
700 | 1 | a Reposeur, T.4 aut |
700 | 1 | a Richards, J. L.4 aut |
700 | 1 | a Ritz, S.4 aut |
700 | 1 | a Rodriguez, A. Y.4 aut |
700 | 1 | a Romani, R. W.4 aut |
700 | 1 | a Ryde, F.4 aut |
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700 | 1 | a Sambruna, R.4 aut |
700 | 1 | a Sanchez, D.4 aut |
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700 | 1 | a Parkinson, P. M. S.4 aut |
700 | 1 | a Scargle, J. D.4 aut |
700 | 1 | a Schalk, T. L.4 aut |
700 | 1 | a Sgro, C.4 aut |
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700 | 1 | a Spandre, G.4 aut |
700 | 1 | a Spinelli, P.4 aut |
700 | 1 | a Starck, J. L.4 aut |
700 | 1 | a Stevenson, M.4 aut |
700 | 1 | a Strickman, M. S.4 aut |
700 | 1 | a Suson, D. J.4 aut |
700 | 1 | a Tagliaferri, G.4 aut |
700 | 1 | a Takahashi, H.4 aut |
700 | 1 | a Ylinen, T.u Högskolan i Kalmar,Naturvetenskapliga institutionen4 aut0 (Swepub:lnu)eylto |
700 | 1 | a Thayer, J. G.4 aut |
700 | 1 | a Thompson, D. J.4 aut |
700 | 1 | a Tibaldo, L.4 aut |
700 | 1 | a Tibolla, O.4 aut |
700 | 1 | a Torres, D. F.4 aut |
700 | 1 | a Tosti, G.4 aut |
700 | 1 | a Tramacere, A.4 aut |
700 | 1 | a Uchiyama, Y.4 aut |
700 | 1 | a Usher, T. L.4 aut |
700 | 1 | a Vilchez, N.4 aut |
700 | 1 | a Vitale, V.4 aut |
700 | 1 | a Waite, A. P.4 aut |
700 | 1 | a Winer, B. L.4 aut |
700 | 1 | a Wood, K. S.4 aut |
700 | 1 | a Ylinen, T.u Högskolan i Kalmar,Naturvetenskapliga institutionen4 aut0 (Swepub:lnu)eylto |
700 | 1 | a Zensus, J. A.4 aut |
700 | 1 | a Ziegler, M.4 aut |
700 | 1 | a Ghisellini, G.4 aut |
700 | 1 | a Maraschi, L.4 aut |
700 | 1 | a Tavecchio, F.4 aut |
700 | 1 | a Angelakis, E.4 aut |
710 | 2 | a Stockholms universitetb Institutionen för astronomi4 org |
773 | 0 | t Astrophysical Journalg 699:2, s. 976-984q 699:2<976-984x 0004-637Xx 1538-4357 |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:hik:diva-2824 |
856 | 4 8 | u https://doi.org/10.1088/0004-637X/699/2/976 |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-28883 |
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