HEAO 1 observations of high-energy X rays from 3C273

Abstract

THE first detection of high-energy (13–120 keV) X rays from the vicinity of the quasar 3C273 is reported here. This object is one of three quasars associated with X-ray sources1–3. Low energy (2–10 keV) X rays3–5 and γ rays (50–500 MeV)6 have been previously observed.

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PRIMINI, F., COOKE, B., DOBSON, C. et al. HEAO 1 observations of high-energy X rays from 3C273. Nature 278, 234–235 (1979). https://doi.org/10.1038/278234a0

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