The PoGO+ view on Crab off-pulse hard X-ray polarization

M. Chauvin, H. G. Florén, M. Friis, M. Jackson, T. Kamae, J. Kataoka, T. Kawano, M. Kiss, V. Mikhalev, T. Mizuno, H. Tajima, H. Takahashi, N. Uchida, M. Pearce*


    研究成果: Article査読

    9 被引用数 (Scopus)


    The linear polarization fraction (PF) and angle of the hard X-ray emission from the Crab provide unique insight into high-energy radiation mechanisms, complementing the usual imaging, timing, and spectroscopic approaches. Results have recently been presented by two missions operating in partially overlapping energy bands, PoGO+ (18-160 keV) and AstroSat CZTI (100-380 keV). We previously reported PoGO+ results on the polarization parameters integrated across the light curve and for the entire nebula-dominated off-pulse region. We now introduce finer phase binning, in light of the AstroSat CZTI claim that the PF varies across the off-pulse region. Since both missions are operating in a regime where errors on the reconstructed polarization parameters are non-Gaussian, we adopt a Bayesian approach to compare results from each mission. We find no statistically significant variation in off-pulse polarization parameters, neither when considering the mission data separately nor when they are combined. This supports expectations from standard high-energy emission models.

    ジャーナルMonthly Notices of the Royal Astronomical Society: Letters
    出版ステータスPublished - 2018 6月 1

    ASJC Scopus subject areas

    • 天文学と天体物理学
    • 宇宙惑星科学


    「The PoGO+ view on Crab off-pulse hard X-ray polarization」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。