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.
@article{arxiv.1012.2862,
title = {Three Millisecond Pulsars in FERMI LAT Unassociated Bright Sources},
author = {S. M. Ransom and P. S. Ray and F. Camilo and M. S. E. Roberts and O. Celik and M. T. Wolff and C. C. Cheung and M. Kerr and T. Pennucci and M. E. DeCesar and I. Cognard and A. G. Lyne and B. W. Stappers and P. C. C. Freire and J. E. Grove and A. A. Abdo and G. Desvignes and D. Donato and E. C. Ferrara and N. Gehrels and L. Guillemot and C. Gwon and A. K. Harding and S. Johnston and M. Keith and M. Kramer and P. F. Michelson and D. Parent and P. M. Saz Parkinson and R. W. Romani and D. A. Smith and G. Theureau and D. J. Thompson and P. Weltevrede and K. S. Wood and M. Ziegler},
journal= {arXiv preprint arXiv:1012.2862},
year = {2011}
}