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• W2894099150 abstract "Located at the center of the Perseus cluster, 3C 84 is an extremely bright and nearby radio galaxy. Because of the strong diffuse thermal emission from the cluster in X-rays, the detailed properties and the origin of a power-law component from the central active galactic nucleus (AGN) remains unclear in the source. We report here the first NuSTAR observations of 3C 84. The source was observed for 24.2 and 32 ks on 2018 February 1 and 4, respectively. NuSTAR observations spectrally decompose the power-law AGN component above 10 keV. The power-law component dominates the spectrum above 20 keV with a photon index ∼1.9 and an energy flux F20–30 keV = 1.0 × 10−11 erg cm−2 s−1, corresponding to an isotropic luminosity, L20–30 keV = 7.4 × 1042 erg s−1. We discuss possible emitting sites for the power-law component. The expected thermal emission from the accretion disk is not hot enough to account for the hard X-rays detected from the source. Similar X-ray and γ-ray photon indices and long-term flux variations, the absence of cutoff energy in the hard X-ray spectrum of the source, correlated hard X-ray flux and hardness ratio variations, and the similarity of optical-X-ray slope to blazar rather than Seyfert galaxies supports the hard X-ray power-law component originating from the jet." @default.
• W2894099150 created "2018-10-05" @default.
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• W2894099150 date "2018-10-11" @default.
• W2894099150 modified "2023-09-26" @default.
• W2894099150 title "<i>NuStar</i> View of the Central Region of the Perseus Cluster" @default.
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• W2894099150 doi "https://doi.org/10.3847/2041-8213/aae48f" @default.
• W2894099150 hasPublicationYear "2018" @default.
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