Physical Sciences: 80 MHz Observations of the Scorpius X-1 Source

Abstract

Andrew and Purton¹ discovered a weak high frequency radio source, which they identified with the strong X-ray source Sco X-1. The identification was confirmed by Ables², who also discovered significant changes in the source's flux density. A subsequent high resolution study of the region by Hjellming and Wade³ at 2,695 and 8,085 MHz showed clearly the presence of three closely spaced sources; the central source was found to be highly variable over a period of hours and was identified with the optical object associated with the X-ray source. It was noted that its flare emission tended to be considerably stronger at 2,695 MHz than at 8,085 MHz, with spectral indices of upto 1.5.