Thursday, January 26, 2012

1201.5160 (M. Kerr et al.)

Five New Millisecond Pulsars From a Radio Survey of 14 Unidentified Fermi-LAT Gamma-ray Sources    [PDF]

M. Kerr, F. Camilo, T. J. Johnson, E. C. Ferrara, L. Guillemot, A. K. Harding, J. Hessels, S. Johnston, M. Keith, M. Kramer, S. M. Ransom, P. S. Ray, J. E. Reynolds, J. Sarkissian, K. S. Wood
We have discovered five millisecond pulsars (MSPs) in a survey of 14 unidentified Fermi-LAT 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 =2.57 ms, DM=12 pc cm-3), we have detected {\gamma}-ray pulsations and measured its proper motion. Its {\gamma}-ray spectrum (a power law of {\Gamma} = 0.9 with a cutoff at 1.6 GeV) and efficiency are typical of other MSPs, but its radio and {\gamma}-ray light curves challenge simple geometric models of emission. The high success rate of this survey-enabled by selecting {\gamma}-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.
View original: http://arxiv.org/abs/1201.5160

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