%0 Journal Article
%T Pulsed Gamma-rays from PSR J2021+3651 with the Fermi Large Area Telescope
%T Dermer 1 , A. de Angelis 28 , A. de Luca 29 , F. de Palma 13
%+ Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112))
%+ Laboratoire Leprince-Ringuet (LLR)
%+ Laboratoire de physique et chimie de l'environnement (LPCE)
%+ Laboratoire de Physique Théorique et Astroparticules (LPTA)
%+ Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG)
%+ Centre d'étude spatiale des rayonnements (CESR)
%A Abdo, A.A.
%A Ackermann, Markus
%A Ajello, Marco
%A Atwood, W.B.
%A Baldini, Luca
%A Ballet, Jean
%A Barbiellini, Guido
%A Bastieri, D.
%A Battelino, M.
%A Baughman, B.M.
%A Bechtol, K.
%A Bellazzini, R.
%A Berenji, B.
%A Bloom, E.D.
%A Bogaert, G.
%A Borgland, A.W.
%A Bregeon, J.
%A Brez, A.
%A Brigida, M.
%A Bruel, Pascal
%A Burnett, T.H.
%A Caliandro, G.A.
%A Cameron, R.A.
%A Camilo, F.
%A Caraveo, P. A.
%A Casandjian, J.M.
%A Cecchi, C.
%A Charles, E.
%A Chekhtman, A.
%A Chen, A.W.
%A Cheung, C.C.
%A Chiang, J.
%A Ciprini, S.
%A Cognard, Ismaël
%A Cohen-Tanugi, J.
%A Cominsky, L.R.
%A Conrad, J.
%A Cutini, S.
%A Demorest, P.
%A Dermer, C.D.
%A de Angelis, A.
%A de Luca, A.
%A de Palma, F.
%A Digel, S.W.
%A Dormody, M.
%A Do Couto E Silva, E.
%A Drell, P.S.
%A Dubois, R.
%A Dumora, D.
%A Espinoza, C.
%A Farnier, C.
%A Favuzzi, C.
%A Focke, W.B.
%A Frailis, M.
%A Freire, P.C. C.
%A Fukazawa, Y.
%A Funk, S.
%A Fusco, P.
%A Gargano, F.
%A Gasparrini, D.
%A Gehrels, N.
%A Germani, S.
%A Giebels, B.
%A Giglietto, N.
%A Giordano, F.
%A Glanzman, T.
%A Godfrey, G.
%A Grenier, I.A.
%A Grondin, M.-H.
%A E. Grove, J.
%A Guillemot, L.
%A Guiriec, S.
%A Hanabata, Y.
%A K. Harding, A.
%A Hayashida, M.
%A Hays, E.
%A Hughes, R.E.
%A Johannesson, G.
%A Johnson, A.S.
%A P. Johnson, R.
%A Johnson, T.J.
%A N. Johnson, W.
%A Johnston, S.
%A Kamae, T.
%A Katagiri, H.
%A Kataoka, J.
%A Kawai, N.
%A Kerr, M.
%A Kiziltan, B.
%A Knödlseder, Jürgen
%A Komin, N.
%A Kramer, M.
%A Kuehn, F.
%A Kuss, M.
%A Lande, J.
%A Latronico, L.
%A Lee, S.-H.
%A Lemoine-Goumard, M.
%A Longo, F.
%A Loparco, F.
%A Lott, B.
%A Lovellette, M.N.
%A Lubrano, P.
%A Lyne, A.G.
%A Makeev, A.
%A Manchester, R.N.
%A Marelli, M.
%A Mazziotta, M.N.
%A Mcconville, W.
%A E. Mcenery, J.
%A A. Mclaughlin, M.
%A Meurer, C.
%A F. Michelson, P.
%A Mitthumsiri, W.
%A Mizuno, T.
%A A. Moiseev, A.
%A Monte, C.
%A E. Monzani, M.
%A Morselli, A.
%A V. Moskalenko, I.
%A Murgia, S.
%A L. Nolan, P.
%A Noutsos, A.
%A Nuss, E.
%A Ohsugi, T.
%A Omodei, N.
%A Orlando, E.
%A F. Ormes, J.
%A Ozaki, M.
%A Paneque, D.
%A H. Panetta, J.
%A Parent, D.
%A Pepe, M.
%A Pesce-Rollins, M.
%A Piron, F.
%A Porter, T.A.
%A Raino, S.
%A Rando, R.
%A M. Ransom, S.
%A Razzano, M.
%A Reimer, A.
%A Reimer, O.
%A Reposeur, T.
%A Ritz, S.
%A S. Rochester, L.
%A Y. Rodriguez, A.
%A W. Romani, R.
%A Ryde, F.
%A F.-W. Sadrozinski, H.
%A Sanchez, D.
%A M. Saz Parkinson, P.
%A Sgro, C.
%A Sierpowska-Bartosik, A.
%A J. Siskind, E.
%A Smith, David Stanley
%A D. Smith, P.
%A Spandre, G.
%A Spinelli, P.
%A W. Stappers, B.
%A Starck, Jean-Luc
%A S. Strickman, M.
%A J. Suson, D.
%A Tajima, H.
%A Takahashi, H.
%A Takahashi, T.
%A Tanaka, T.
%A B. Thayer, J.
%A G. Thayer, J.
%A Theureau, Gilles
%A J. Thompson, D.
%A E. Thorsett, S.
%A Tibaldo, L.
%A F. Torres, D.
%A Tosti, G.
%A Tramacere, A.
%A Uchiyama, Y.
%A L. Usher, T.
%A van Etten, A.
%A Vilchez, N.
%A Vitale, V.
%A P. Waite, A.
%A Wallace, E.
%A Watters, K.
%A Weltevrede, P.
%A S. Wood, K.
%A Ylinen, T.
%A Ziegler, M.
%Z Accepted by the Astrophysical Journal, 25 May 2009
%< avec comité de lecture
%@ 0004-637X
%J The Astrophysical Journal
%I American Astronomical Society
%V 700
%P 1059-1066
%8 2009-08-01
%D 2009
%Z 0905.4400
%R 10.1088/0004-637X/700/2/1059
%Z Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]
%Z Physics [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA]
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA]Journal articles
%X We report the detection of pulsed gamma-rays from the young, spin-powered radio pulsar PSR J2021+3651 using data acquired with the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope (formerly GLAST). The light curve consists of two narrow peaks of similar amplitude separated by 0.468 +/- 0.002 in phase. The first peak lags the maximum of the 2 GHz radio pulse by 0.162 +/- 0.004 +/- 0.01 in phase. The integral gamma-ray photon flux above 100 MeV is (56 +/- 3 +/- 11) x 10^{-8} /cm2/s. The photon spectrum is well-described by an exponentially cut-off power law of the form dF/dE = kE^{-\Gamma} e^(-E/E_c) where the energy E is expressed in GeV. The photon index is \Gamma = 1.5 +/- 0.1 +/- 0.1 and the exponential cut-off is E_c = 2.4 +/- 0.3 +/- 0.5 GeV. The first uncertainty is statistical and the second is systematic. The integral photon flux of the bridge is approximately 10% of the pulsed emission, and the upper limit on off-pulse gamma-ray emission from a putative pulsar wind nebula is <10% of the pulsed emission at the 95% confidence level. Radio polarization measurements yield a rotation measure of RM = 524 +/- 4 rad/m^2 but a poorly constrained magnetic geometry. Re-analysis of Chandra data enhanced the significance of the weak X-ray pulsations, and the first peak is roughly phase-aligned with the first gamma-ray peak. We discuss the emission region and beaming geometry based on the shape and spectrum of the gamma-ray light curve combined with radio and X-ray measurements, and the implications for the pulsar distance. Gamma-ray emission from the polar cap region seems unlikely for this pulsar.
%G English
%Z Fermi-LAT
%2 https://hal.in2p3.fr/in2p3-00394148/document
%2 https://hal.in2p3.fr/in2p3-00394148/file/Abdo_2009_ApJ_700_1059.pdf
%L in2p3-00394148
%U https://hal.in2p3.fr/in2p3-00394148
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