Three Millisecond Pulsars in FERMI LAT Unassociated Bright Sources

S. M. Ransom , P. S. Ray , F. Camilo , M. S. E. Roberts , O. Celik , M. T. Wolff , C. C. Cheung , M. Kerr , T. Pennucci , M. E. Decesar , Ismaël Cognard (1, 2) , A. G. Lyne , B. W. Stappers , P. C. C. Freire , J. E. Grove , A.A. Abdo , G. Desvignes , D. Donato , E. C. Ferrara , N. Gehrels , L. Guillemot , C. Gwon , A. K. Harding , S. Johnston , M. Keith , M. Kramer , P. F. Michelson , D. Parent , P. M. Saz Parkinson , R. W. Romani , D. A. Smith (3) , Gilles Theureau (1, 2) , D. J. Thompson , P. Weltevrede , K. S. Wood , M. Ziegler

1 USN - Unité Scientifique de la Station de Nançay
2 LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace
3 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan

We searched for radio pulsars in 25 of the non-variable, unassociated sources in the Fermi LAT Bright Source List with the Green Bank Telescope at 820 MHz. We report the discovery of three radio and gamma-ray millisecond pulsars (MSPs) from a high Galactic latitude subset of these sources. All of the pulsars are in binary systems, which would have made them virtually impossible to detect in blind gamma-ray pulsation searches. They seem to be relatively normal, nearby (<=2 kpc) millisecond pulsars. These observations, in combination with the Fermi detection of gamma-rays from other known radio MSPs, imply that most, if not all, radio MSPs are efficient gamma-ray producers. The gamma-ray spectra of the pulsars are power-law in nature with exponential cutoffs at a few GeV, as has been found with most other pulsars. The MSPs have all been detected as X-ray point sources. Their soft X-ray luminosities of ~10^{30-31} erg/s are typical of the rare radio MSPs seen in X-rays.

Mots clés: pulsars: individual (J0614−3329 J1231−1411 J2214+3000); pulsars: general

Domaines: Phénomènes cosmiques de haute energie [astro-ph.HE]; Phénomènes cosmiques de haute energie [astro-ph.HE]; Astrophysique stellaire et solaire [astro-ph.SR]; Astrophysique stellaire et solaire [astro-ph.SR]

S. M. Ransom, P. S. Ray, F. Camilo, M. S. E. Roberts, O. Celik, et al.. Three Millisecond Pulsars in FERMI LAT Unassociated Bright Sources. The Astrophysical journal letters, 2011, 727, pp.L16. ⟨10.1088/2041-8205/727/1/L16⟩. ⟨in2p3-00586142⟩