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- W2066080424 abstract "Results are reported for four X-ray scans of the region containing Cen A. It is found that the X-ray source had a hard number spectrum (spectral index of -1.2) during these observations and that the intensity in the range from 10 to 100 keV apparently increased by 230% with no detectable change in spectral shape between two observations 210 days apart. Either a Compton-synchrotron mechanism or thermal bremsstrahlung at any temperature greater than 200 keV is suggested as the source of the X-rays. It is noted that the present observations, together with a similar detection of another galaxy, may establish a distinct class of extragalactic X-ray objects with flat and highly absorbed spectra." @default.
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- W2066080424 date "1976-05-01" @default.
- W2066080424 modified "2023-09-27" @default.
- W2066080424 title "UCSD OSO-7 observations of the hard X-ray spectrum and variability of Centaurus A" @default.
- W2066080424 doi "https://doi.org/10.1086/182129" @default.
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