Five new millisecond pulsars from a radio survey of 14 unidentified Fermi-lat gamma-ray sources

Research output: Contribution to journalArticle

  • External authors:
  • M. Kerr
  • F. Camilo
  • T. J. Johnson
  • E. C. Ferrara
  • L. Guillemot
  • A. K. Harding
  • J. Hessels
  • S. Johnston
  • M. Kramer
  • S. M. Ransom
  • P. S. Ray
  • J. E. Reynolds
  • J. Sarkissian
  • K. S. Wood

Abstract

We have discovered five millisecond pulsars (MSPs) in a survey of 14 unidentified Fermi Large Area Telescope sources in the southern sky using the Parkes radio telescope. PSRs J0101-6422, J1514-4946, and J1902-5105 reside in binaries, while PSRs J1658-5324 and J1747-4036 are isolated. Using an ephemeris derived from timing observations of PSR J0101-6422 (P = 2.57ms, DM = 12pccm -3), we have detected γ-ray pulsations and measured its proper motion. Its γ-ray spectrum (a power law of Γ = 0.9 with a cutoff at 1.6GeV) and efficiency are typical of other MSPs, but its radio and γ-ray light curves challenge simple geometric models of emission. The high success rate of this survey - enabled by selecting γ-ray sources based on their detailed spectral characteristics - and other similarly successful searches indicate that a substantial fraction of the local population of MSPs may soon be known. © 2012 The American Astronomical Society. All rights reserved.

Bibliographical metadata

Original languageEnglish
Article numberL2
JournalAstrophysical Journal Letters
Volume748
Issue number1
DOIs
Publication statusPublished - 20 Mar 2012