GAMMA-RAY FLARE ACTIVITY from PSR B1259-63 during 2014 PERIASTRON PASSAGE and COMPARISON to ITS 2010 PASSAGE

G. A. Caliandro, C. C. Cheung, J. Li, J. D. Scargle, D. F. Torres, K. S. Wood, M. Chernyakova

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    Abstract

    � 2015. The American Astronomical Society. All rights reserved.. 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.
    Original languageEnglish
    Article number68
    JournalAstrophysical Journal
    Volume811
    Issue number1
    DOIs
    Publication statusPublished - 20 Sep 2015

    Keywords

    • gamma rays: stars
    • pulsars: individual (PSR B125963)
    • X-rays: binaries

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    Caliandro, G. A., Cheung, C. C., Li, J., Scargle, J. D., Torres, D. F., Wood, K. S., & Chernyakova, M. (2015). GAMMA-RAY FLARE ACTIVITY from PSR B1259-63 during 2014 PERIASTRON PASSAGE and COMPARISON to ITS 2010 PASSAGE. Astrophysical Journal, 811(1), [68]. https://doi.org/10.1088/0004-637X/811/1/68