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Gamma-ray flare activity from PSR B1259-63 during 2014 periastron passage and comparison to its 2010 passage

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arxiv 1509.02856 v1 pith:XMO4VS2X submitted 2015-09-09 astro-ph.HE

G. A. Caliandro , C. C. Cheung , J. Li , J. D. Scargle , D. F. Torres , K. S. Wood , M. Chernyakova This is my paper · ORCID
classification astro-ph.HE
keywords periastronb1259-63passageflaregamma-rayduringradioactivity
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PSR B1259-63/LS 2883 is a gamma-ray binary system containing a radio pulsar in a highly elliptical ~3.4-year orbit around a Be star. In its 2010 periastron passage, multiwavelength emission from radio to TeV was observed, as well as an unexpected GeV flare measured by the Fermi Large Area Telescope (LAT). Here, we report the results of LAT monitoring of PSR B1259-63 during its most recent 2014 periastron passage. We compare the gamma-ray behavior in this periastron with the former in 2010 and find that PSR B1259-63 shows a recurrent GeV flare. The similarities and differences in the phenomenology of both periastron passages are discussed.

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