Discovery of pulsed γ-rays from the young radio pulsar PSR J1028-5819 with the FERMI large area telescope

Research output: Contribution to journalArticle

  • External authors:
  • A. A. Abdo
  • M. Ackermann
  • W. B. Atwood
  • L. Baldini
  • J. Ballet
  • G. Barbiellini
  • M. G. Baring
  • D. Bastieri
  • B. M. Baughman
  • K. Bechtol
  • R. Bellazzini
  • B. Berenji
  • E. D. Bloom
  • E. Bonamente
  • A. W. Borgland
  • J. Bregeon
  • A. Brez
  • M. Brigida
  • P. Bruel
  • T. H. Burnett
  • G. A. Caliandro
  • R. A. Cameron
  • P. A. Caraveo
  • J. M. Casandjian
  • C. Cecchi
  • E. Charles
  • A. Chekhtman
  • C. C. Cheung
  • J. Chiang
  • S. Ciprini
  • R. Claus
  • J. Cohen-Tanugi
  • L. R. Cominsky
  • J. Conrad
  • C. D. Dermer
  • A. De Angelis
  • F. De Palma
  • S. W. Digel
  • D. Donato
  • M. Dormody
  • E. Do Couto E Silva
  • P. S. Drell
  • R. Dubois
  • D. Dumora
  • Y. Edmonds
  • C. Farnier
  • C. Favuzzi
  • P. Fleury
  • W. B. Focke
  • M. Frailis
  • Y. Fukazawa
  • S. Funk
  • P. Fusco
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  • S. Germani
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  • F. Giordano
  • T. Glanzman
  • G. Godfrey
  • I. A. Grenier
  • M. H. Grondin
  • J. E. Grove
  • L. Guillemot
  • S. Guiriec
  • A. K. Harding
  • M. Hayashida
  • E. Hays
  • R. E. Hughes
  • G. Jóhannesson
  • A. S. Johnson
  • R. P. Johnson
  • T. J. Johnson
  • W. N. Johnson
  • S. Johnston
  • T. Kamae
  • H. Katagiri
  • J. Kataoka
  • N. Kawai
  • M. Kerr
  • J. Knödlseder
  • N. Komin
  • M. Kramer
  • F. Kuehn
  • M. Kuss
  • L. Latronico
  • S. H. Lee
  • M. Lemoine-Goumard
  • F. Longo
  • F. Loparco
  • B. Lott
  • M. N. Lovellette
  • P. Lubrano
  • 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
  • T. Ohsugi
  • N. Omodei
  • E. Orlando
  • J. F. Ormes
  • D. Paneque
  • J. H. Panetta
  • D. Parent
  • M. Pepe
  • M. Pesce-Rollins
  • F. Piron
  • T. A. Porter
  • S. Rainò
  • R. Rando
  • M. Razzano
  • A. Reimer
  • O. Reimer
  • T. Reposeur
  • S. Ritz
  • L. S. Rochester
  • A. Y. Rodriguez
  • R. W. Romani
  • M. Roth
  • F. Ryde
  • H. F W Sadrozinski
  • D. Sanchez
  • A. Sander
  • P. M Saz Parkinson
  • C. Sgrò
  • E. J. Siskind
  • D. A. Smith
  • P. D. Smith
  • G. Spandre
  • P. Spinelli
  • J. L. Starck
  • M. S. Strickman
  • D. J. Suson
  • H. Tajima
  • H. Takahashi
  • T. Tanaka
  • J. B. Thayer
  • J. G. Thayer
  • D. J. Thompson
  • S. E. Thorsett
  • L. Tibaldo
  • D. F. Torres
  • G. Tosti
  • A. Tramacere
  • Y. Uchiyama
  • T. L. Usher
  • A. Van Etten
  • N. Vilchez
  • V. Vitale
  • A. P. Waite
  • K. Watters
  • K. S. Wood
  • T. Ylinen
  • M. Ziegler
  • G. Hobbs
  • R. N. Manchester
  • P. Weltevrede

Abstract

Radio pulsar PSR J1028-5819 was recently discovered in a high-frequency search (at 3.1 GHz) in the error circle of the Energetic Gamma-Ray Experiment Telescope (EGRET) source 3EG J1027-5817. The spin-down power of this young pulsar is great enough to make it very likely the counterpart for the EGRET source. We report here the discovery of γ-ray pulsations from PSR J1028-5819 in early observations by the Large Area Telescope (LAT) on the Fermi Gamma-Ray Space Telescope. The γ-ray light curve shows two sharp peaks having phase separation of 0.460 ± 0.004, trailing the very narrow radio pulse by 0.200 ± 0.003 in phase, very similar to that of other known γ-ray pulsars. The measured γ-ray flux gives an efficiency for the pulsar of ∼ 10-20% (for outer magnetosphere beam models). No evidence of a surrounding pulsar wind nebula is seen in the current Fermi data but limits on associated emission are weak because the source lies in a crowded region with high background emission. However, the improved angular resolution afforded by the LAT enables the disentanglement of the previous COS-B and EGRET source detections into at least two distinct sources, one of which is now identified as PSR J1028-5819. © 2009 The American Astronomical Society. All rights reserved.

Bibliographical metadata

Original languageEnglish
Pages (from-to)L72-L77
JournalAstrophysical Journal
Volume695
Issue number1
DOIs
Publication statusPublished - 2009