X-ray Survey of Centaurus A

Science  24 Jul 1970:
Vol. 169, Issue 3943, pp. 366-368
DOI: 10.1126/science.169.3943.366


An x-ray survey of Centaurus A has given marginal evidence of its x-ray flux. If taken as an upper limit on inverse Compton x-rays generated by scattering interactions between relativistic electrons and cosmological background photons, the observation implies an upper limit of close to 3°K for the background radiation temperature.