Pulsed Gamma-rays from the millisecond pulsar J0030+0451 with the Fermi Large Area Telescope

A.A. Abdo Markus Ackermann W. B. Atwood Magnus Axelsson Luca Baldini Jean Ballet 1 Guido Barbiellini D. Bastieri M. Battelino B. M. Baughman K. Bechtol R. Bellazzini B. Berenji E. D. Bloom E. Bonamente A. W. Borgland J. Bregeon A. Brez M. Brigida Pascal Bruel 2 T. H. Burnett G. A. Caliandro R. A. Cameron P. A. Caraveo J. M. Casandjian 1 C. Cecchi E. Charles A. Chekhtman C. C. Cheung J. Chiang S. Ciprini R. Claus Ismaël Cognard 3 J. Cohen-Tanugi 4 L. R. Cominsky J. Conrad S. Cutini C. D. Dermer A. de Angelis F. de Palma S. W. Digel M. Dormody E. Do Couto E Silva P. S. Drell R. Dubois D. Dumora 5 C. Farnier 4 C. Favuzzi W. B. Focke M. Frailis Y. Fukazawa S. Funk P. Fusco F. Gargano D. Gasparrini N. Gehrels S. Germani B. Giebels 2 N. Giglietto F. Giordano T. Glanzman G. Godfrey I. A. Grenier 1 M.-H. Grondin 5 J. E. Grove L. Guillemot 5 S. Guiriec 4 Y. Hanabata A. K. Harding M. Hayashida E. Hays R. E. Hughes G. J'Ohannesson A. S. Johnson R. P. Johnson T. J. Johnson W. N. Johnson T. Kamae H. Katagiri J. Kataoka N. Kawai M. Kerr J. Knodlseder 6 M. L. Kocian N. Komin 1, 4 F. Kuehn M. Kuss J. Lande L. Latronico S.-H. Lee M. Lemoine-Goumard 5 F. Longo F. Loparco B. Lott 5 M. N. Lovellette P. Lubrano G. M. Madejski A. Makeev M. Marelli M. N. Mazziotta W. Mcconville J. E. Mcenery C. Meurer P. F. Michelson W. Mitthumsiri T. Mizuno A. A. Moiseev C. Monte M. E. Monzani A. Morselli I. V. Moskalenko S. Murgia P. L. Nolan E. Nuss 4 T. Ohsugi N. Omodei E. Orlando J. F. Ormes B. Pancrazi 6 D. Paneque J. H. Panetta D. Parent 5 M. Pepe M. Pesce-Rollins F. Piron 4 T.A. Porter S. Raino R. Rando M. Razzano A. Reimer O. Reimer T. Reposeur 5 S. Ritz L. S. Rochester A. Y. Rodriguez R. W. Romani F. Ryde H. F.-W. Sadrozinski D. Sanchez 2 A. Sander P. M. Saz Parkinson C. Sgro E. J. Siskind David Stanley Smith 5 P. D. Smith G. Spandre P. Spinelli Jean-Luc Starck 1 M. S. Strickman D. J. Suson H. Tajima H. Takahashi T. Tanaka J. B. Thayer J. G. Thayer G. Theureau 3 D. J. Thompson L. Tibaldo D. F. Torres G. Tosti A. Tramacere Y. Uchiyama T. L. Usher A. van Etten N. Vilchez 6 V. Vitale A. P. Waite K. Watters N. Webb K. S. Wood T. Ylinen M. Ziegler
Abstract : We report the discovery of gamma-ray pulsations from the nearby isolated millisecond pulsar PSR J0030+0451 with the Large Area Telescope (LAT) on the \emph{Fermi} Gamma-ray Space Telescope (formerly GLAST). This discovery makes PSR J0030+0451 the second millisecond pulsar to be detected in gamma-rays after PSR J0218+4232, observed by the EGRET instrument on the Compton Gamma Ray Observatory. The spin-down power $\dot E = $ 3.5 $\times$ 10$^{33}$ ergs s$^{-1}$ is an order of magnitude lower than the empirical lower bound of previously known gamma-ray pulsars. The emission profile is characterized by two narrow peaks, respectively 0.07 $\pm$ 0.01 and 0.08 $\pm$ 0.02 wide, separated by 0.44 $\pm$ 0.02 in phase. The first gamma-ray peak falls 0.15 $\pm$ 0.01 after the main radio peak. The pulse shape is similar to that of the "normal" gamma-ray pulsars. An exponentially cut-off power-law fit of the emission spectrum leads to an integral photon flux above 100 MeV of (6.76 $\pm$ 1.05 $\pm$ 1.35) $\times 10^{-8}$ cm$^{-2}$ s$^{-1}$ with cut-off energy (1.7 $\pm$ 0.4 $\pm$ 0.5) GeV. Based on its parallax distance of $(300 \pm 90)$ pc, we obtain a gamma-ray efficiency $L_\gamma / \dot{E} \simeq 15%$ for the conversion of spin-down energy rate into gamma-ray radiation, assuming isotropic emission.
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Submitted on : Thursday, April 30, 2009 - 10:26:24 AM
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A.A. Abdo, Markus Ackermann, W. B. Atwood, Magnus Axelsson, Luca Baldini, et al.. Pulsed Gamma-rays from the millisecond pulsar J0030+0451 with the Fermi Large Area Telescope. The Astrophysical Journal, American Astronomical Society, 2009, 699, pp.1171-1177. ⟨10.1088/0004-637X/699/2/1171⟩. ⟨in2p3-00380184⟩

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