X-rays from Sources 3C 273 and M 87
- 13 October 1967
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 158 (3798) , 257-259
- https://doi.org/10.1126/science.158.3798.257
Abstract
An x-ray survey of the Virgo region revealed signals from the directions of 3C 273 and M 87. Three other x-ray sources appear in the region scanned, but do not fit any known radio sources. The x-ray flux (1 to 10 angstroms) from the direction of 3C 273 is about 1000 times weaker than from the strongest x-ray source, Sco XR-1. If the source is located at the cosmological distance of 500 megaparsecs, the x-ray luminosity is 7.3 x 1045 ergs per second. The x-ray luminosity of M87 is 1.5 x 1043 ergs per second.Keywords
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