Discovery of high-energy gamma-ray emission from the binary system PSR B1259-63/LS 2883 around periastron with Fermi

Research output: Contribution to journalArticle

  • External authors:
  • A. A. Abdo
  • M. Ackermann
  • M. Ajello
  • A. Allafort
  • J. Ballet
  • G. Barbiellini
  • D. Bastieri
  • K. Bechtol
  • R. Bellazzini
  • B. Berenji
  • R. D. Blandford
  • E. Bonamente
  • A. W. Borgland
  • J. Bregeon
  • M. Brigida
  • P. Bruel
  • R. Buehler
  • S. Buson
  • G. A. Caliandro
  • R. A. Cameron
  • F. Camilo
  • P. A. Caraveo
  • C. Cecchi
  • E. Charles
  • S. Chaty
  • A. Chekhtman
  • M. Chernyakova
  • C. C. Cheung
  • J. Chiang
  • S. Ciprini
  • R. Claus
  • J. Cohen-Tanugi
  • L. R. Cominsky
  • S. Corbel
  • S. Cutini
  • F. D'Ammando
  • A. De Angelis
  • P. R. Den Hartog
  • F. De Palma
  • C. D. Dermer
  • S. W. Digel
  • E. Do Couto E Silva
  • M. Dormody
  • P. S. Drell
  • A. Drlica-Wagner
  • R. Dubois
  • G. Dubus
  • D. Dumora
  • T. Enoto
  • C. M. Espinoza
  • C. Favuzzi
  • S. J. Fegan
  • E. C. Ferrara
  • W. B. Focke
  • P. Fortin
  • Y. Fukazawa
  • S. Funk
  • P. Fusco
  • F. Gargano
  • D. Gasparrini
  • N. Gehrels
  • S. Germani
  • N. Giglietto
  • P. Giommi
  • F. Giordano
  • M. Giroletti
  • T. Glanzman
  • G. Godfrey
  • I. A. Grenier
  • M. H. Grondin
  • J. E. Grove
  • E. Grundstrom
  • S. Guiriec
  • C. Gwon
  • D. Hadasch
  • A. K. Harding
  • M. Hayashida
  • E. Hays
  • G. Jóhannesson
  • A. S. Johnson
  • T. J. Johnson
  • S. Johnston
  • T. Kamae
  • H. Katagiri
  • J. Kataoka
  • M. Kerr
  • J. Knödlseder
  • M. Kramer
  • M. Kuss
  • J. Lande
  • S. H. Lee
  • M. Lemoine-Goumard
  • F. Longo
  • F. Loparco
  • M. N. Lovellette
  • P. Lubrano
  • R. N. Manchester
  • M. Marelli
  • M. N. Mazziotta
  • P. F. Michelson
  • W. Mitthumsiri
  • T. Mizuno
  • A. A. Moiseev
  • C. Monte
  • M. E. Monzani
  • A. Morselli
  • I. V. Moskalenko
  • S. Murgia
  • T. Nakamori
  • M. Naumann-Godo
  • A. Neronov
  • P. L. Nolan
  • J. P. Norris
  • A. Noutsos
  • E. Nuss
  • T. Ohsugi
  • A. Okumura
  • N. Omodei
  • E. Orlando
  • D. Paneque
  • D. Parent
  • M. Pesce-Rollins
  • M. Pierbattista
  • F. Piron
  • T. A. Porter
  • A. Possenti
  • S. Rainò
  • R. Rando
  • P. S. Ray
  • M. Razzano
  • S. Razzaque
  • A. Reimer
  • O. Reimer
  • T. Reposeur
  • S. Ritz
  • H. F W Sadrozinski
  • J. D. Scargle
  • C. Sgrò
  • R. Shannon
  • E. J. Siskind
  • P. D. Smith
  • G. Spandre
  • P. Spinelli
  • M. S. Strickman
  • D. J. Suson
  • H. Takahashi
  • T. Tanaka
  • J. G. Thayer
  • J. B. Thayer
  • D. J. Thompson
  • S. E. Thorsett
  • L. Tibaldo
  • O. Tibolla
  • D. F. Torres
  • G. Tosti
  • E. Troja
  • Y. Uchiyama
  • T. L. Usher
  • J. Vandenbroucke
  • V. Vasileiou
  • G. Vianello
  • V. Vitale
  • A. P. Waite
  • P. Wang
  • B. L. Winer
  • M. T. Wolff
  • D. L. Wood
  • K. S. Wood
  • Z. Yang
  • M. Ziegler
  • S. Zimmer

Abstract

We report on the discovery of ≥100MeV γ-rays from the binary system PSR B1259-63/LS 2883 using the Large Area Telescope (LAT) on board Fermi. The system comprises a radio pulsar in orbit around a Be star. We report on LAT observations from near apastron to ∼128 days after the time of periastron, ∼tp , on 2010 December 15. No γ-ray emission was detected from this source when it was far from periastron. Faint γ-ray emission appeared as the pulsar approached periastron. At ∼tp + 30 days, the ≥100MeV γ-ray flux increased over a period of a few days to a peak flux 20-30 times that seen during the pre-periastron period, but with a softer spectrum. For the following month, it was seen to be variable on daily timescales, but remained at ∼(1-4) × 10-6 cm-2 s-1 before starting to fade at ∼tp + 57 days. The total γ-ray luminosity observed during this period is comparable to the spin-down power of the pulsar. Simultaneous radio and X-ray observations of the source showed no corresponding dramatic changes in radio and X-ray flux between the pre-periastron and post-periastron flares. We discuss possible explanations for the observed γ-ray-only flaring of the source. © 2011. The American Astronomical Society. All rights reserved.

Bibliographical metadata

Original languageEnglish
Article numberL11
JournalAstrophysical Journal Letters
Volume736
Issue number1
DOIs
Publication statusPublished - 20 Jul 2011