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- W3100462512 abstract "We present results of the first RXTE investigation of hard X-ray emission from normal elliptical galaxies. Joint spectral analysis of RXTE Proportional Counter Array and ASCA Gas Imaging Spectrometer data for NGC 4472 and NGC 4649 reveals the presence of ~5 × 10-12 ergs cm-2 s-1 of 2-10 keV emission emanating from a region outside of the optical galaxy and of a spectral hardness intermediate between the galactic hot interstellar gas and X-ray binary components. A large fraction of this emission originates in the Virgo intracluster medium (ICM), and we present constraints on the ICM temperature and metallicity in the vicinity of these two galaxies. However, the diffuse flux is significantly greater than expected based on the soft X-ray intensity measured with ROSAT, allowing for the possible presence of an additional diffuse nonthermal component. We also derive new constraints on the integrated X-ray binary emission from these two galaxies and on the presence of a nuclear flat-spectrum point source." @default.
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- W3100462512 date "2001-02-01" @default.
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- W3100462512 title "RXTEInvestigation into Extended Hard X‐Ray Emission from Elliptical Galaxies" @default.
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- W3100462512 doi "https://doi.org/10.1086/318419" @default.
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