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Three Millisecond Pulsars in FERMI LAT Unassociated Bright Sources

Abstract : 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.
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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. Astrophysical Journal Letters, IOP Science, 2011, 727, pp.L16. ⟨10.1088/2041-8205/727/1/L16⟩. ⟨in2p3-00586142⟩

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