Abstract
IN late 1970, the X-ray satellite, Uhuru, was launched by the X-ray group at American Science and Engineering, Inc. Numerous strong sources were discovered, some of which have been published1. About 25% of the observed sources have possible optical identifications.
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RICHER, H., AUMAN, J., ISHERWOOD, B. et al. Search for High Frequency Optical Variability in X-Ray Sources. Nature Physical Science 238, 131–132 (1972). https://doi.org/10.1038/physci238131a0
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DOI: https://doi.org/10.1038/physci238131a0
