COGNARD, Ismaël; GUILLEMOT, Lucas; JOHNSON, T. J.; SMITH, D. A.; VENTER, C.; HARDING, A. K.; WOLFF, M. T.; CHEUNG, C. C.; DONATO, D.; ABDO, A.A.; BALLET, Jean; CAMILO, F.; DESVIGNES, G.; DUMORA, D.; FERRARA, E. C.; FREIRE, P. C. C.; GROVE, J. E.; JOHNSTON, S.; KEITH, M.; KRAMER, M.; LYNE, A. G.; MICHELSON, P. F.; PARENT, D.; RANSOM, S. M.; RAY, P. S.; ROMANI, R. W.; PARKINSON, P. M. Saz; STAPPERS, B. W.; THEUREAU, Gilles; THOMPSON, D. J.; WELTEVREDE, P.; WOOD, K. S.

doi:10.1088/0004-637X/732/1/47

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COGNARD, Ismaël
Unité Scientifique de la Station de Nançay [USN]
Laboratoire de physique et chimie de l'environnement [LPCE]

GUILLEMOT, Lucas
Max-Planck-Institut für Radioastronomie [MPIFR]

JOHNSON, T. J.
NASA Goddard Space Flight Center [GSFC]

COGNARD, Ismaël
Unité Scientifique de la Station de Nançay [USN]
Laboratoire de physique et chimie de l'environnement [LPCE]

GUILLEMOT, Lucas
Max-Planck-Institut für Radioastronomie [MPIFR]

JOHNSON, T. J.
NASA Goddard Space Flight Center [GSFC]

SMITH, D. A.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

VENTER, C.
North-West University [South Aftrica] [NWU]

HARDING, A. K.
NASA Goddard Space Flight Center [GSFC]

WOLFF, M. T.
Space Science Division [Washington]

CHEUNG, C. C.
National Research Council Washington

DONATO, D.
Center for Research and Exploration in Space Science and Technology [GSFC] [CRESST]

ABDO, A.A.
National Research Council Washington

BALLET, Jean
Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]

CAMILO, F.
Columbia Astrophysics Laboratory [CAL]

DESVIGNES, G.
Berkeley Radio Astronomy Laboratory [RAL]

DUMORA, D.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

FERRARA, E. C.
NASA Goddard Space Flight Center [GSFC]

FREIRE, P. C. C.
Max-Planck-Institut für Radioastronomie [MPIFR]

GROVE, J. E.
Space Science Division [Washington]

JOHNSTON, S.
Australia Telescope National Facility [ATNF]

KEITH, M.
Australia Telescope National Facility [ATNF]

KRAMER, M.
Max-Planck-Institut für Radioastronomie [MPIFR]

LYNE, A. G.
Jodrell Bank Centre for Astrophysics

MICHELSON, P. F.
W. W. Hansen Experimental Physics Laboratory [HEPL]

PARENT, D.
George Mason University [Fairfax]

RANSOM, S. M.
National Radio Astronomy Observatory [Socorro] [NRAO]

RAY, P. S.
Space Science Division [Washington]

ROMANI, R. W.
W. W. Hansen Experimental Physics Laboratory [HEPL]

PARKINSON, P. M. Saz
Santa Cruz Institute for Particle Physics

STAPPERS, B. W.
Jodrell Bank Centre for Astrophysics

THEUREAU, Gilles
Laboratoire de physique et chimie de l'environnement [LPCE]
Unité Scientifique de la Station de Nançay [USN]

THOMPSON, D. J.
NASA Goddard Space Flight Center [GSFC]

WELTEVREDE, P.
Jodrell Bank Centre for Astrophysics

WOOD, K. S.
Space Science Division [Washington]

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The Astrophysical Journal. 2011-05-01, vol. 732, p. 47 (11 pages)

American Astronomical Society

Résumé en anglais

We report the discovery of two millisecond pulsars in a search for radio pulsations at the positions of \emph{Fermi Large Area Telescope} sources with no previously known counterparts, using the Nançay radio telescope. The two millisecond pulsars, PSRs J2017+0603 and J2302+4442, have rotational periods of 2.896 and 5.192 ms and are both in binary systems with low-eccentricity orbits and orbital periods of 2.2 and 125.9 days respectively, suggesting long recycling processes. Gamma-ray pulsations were subsequently detected for both objects, indicating that they power the associated \emph{Fermi} sources in which they were found. The gamma-ray light curves and spectral properties are similar to those of previously-detected gamma-ray millisecond pulsars. Detailed modeling of the observed radio and gamma-ray light curves shows that the gamma-ray emission seems to originate at high altitudes in their magnetospheres. Additionally, X-ray observations revealed the presence of an X-ray source at the position of PSR J2302+4442, consistent with thermal emission from a neutron star. These discoveries along with the numerous detections of radio-loud millisecond pulsars in gamma rays suggest that many \emph{Fermi} sources with no known counterpart could be unknown millisecond pulsars.< Réduire

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Discovery of two millisecond pulsars in Fermi sources with the Nancay Radio Telescope

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