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- W1598081119 abstract "We present hard X-ray observations of the nearby radio galaxy M87 and the core of the Virgo Cluster using the Rossi X-Ray Timing Explorer. These are the first hard X-ray observations of M87 not affected by contamination from the nearby Seyfert 2 galaxy NGC 4388. Thermal emission from Virgo's intracluster medium is clearly detected and has a spectrum indicative of kT ≈ 2.5 keV plasma with approximately 25% cosmic abundances. No nonthermal (power-law) emission from M87 is detected in the hard X-ray band, with fluctuations in the cosmic X-ray background being the limiting factor. Combining with ROSAT data, we infer that the X-ray spectrum of the M87 core and jet must be steep (Γcore > 1.90 and Γjet > 1.75), and we discuss the implications of this result. In particular, these results are consistent with M87 being a misaligned BL Lac object." @default.
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- W1598081119 date "1999-08-10" @default.
- W1598081119 modified "2023-10-16" @default.
- W1598081119 title "ARossi X‐Ray Timing ExplorerStudy of M87 and the Core of the Virgo Cluster" @default.
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- W1598081119 doi "https://doi.org/10.1086/307538" @default.
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