Abstract
THE high energy (2–18 keV) detector system of the Ariel V X-ray sky survey experiment (SSE) has observed the faint, high galactic latitude X-ray sources 3U2131+11 and MXO513−40 on a number of separate occasions over a period of a year (January–December 1975) and the results are reported here. These sources have previously been observed by OSO-7 (and 3U2131+11 also by Uhuru), and the globular clusters NGC 7078 and NGC 1851 respectively, were proposed as identifications1,2. Variability of the timescales of days to months was also observed2.
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PYE, J., COOKE, B. Ariel V sky survey observations of X rays from the globular cluster candidates 3U2131+11 and MXO513—40. Nature 260, 410–412 (1976). https://doi.org/10.1038/260410a0
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DOI: https://doi.org/10.1038/260410a0
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