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Accession Number
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N20120011806
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Title
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Five New Millisecond Pulsars from a Radio Survey of 14 Unidentified Fermi-LAT Gamma-Ray Sources.
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Publication Date
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2012
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Media Count
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6p
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Personal Author
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A. K. Harding E. C. Ferrara F. Camilo J. Hessels J. Sarkissian J. E. Reynolds K. S. Wood L. Guillemot M. Keith M. Kerr M. Kramer P. S. Ray S. Johnson S. M. Ransom T. J. Johnson
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Abstract
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We have discovered five millisecond pulsars (MSPs) in a survey of 14 unidentified Ferm; 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 JOl01-6422 (P=2.57ms, DH=12pc/cubic cm), 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.
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Keywords
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Gamma ray astronomy
Gamma ray sources(Astronomy)
Gamma ray spectra
Pulsars
Radio astronomy
Radio telescopes
Sky surveys(Astronomy)
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Source Agency
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National Aeronautics and Space Administration
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NTIS Subject Category
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54B - Astronomy & Celestial Mechanics
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Corporate Author
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Goddard Space Flight Center, Greenbelt, MD.
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Document Type
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Journal article
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Title Note
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N/A
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NTIS Issue Number
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1301
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Contract Number
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NAS8-03060
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