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Persistent X-ray emission from a γ-ray burst source

Abstract

A quiescent X-ray source detected with the Einstein X-ray Observatory in a location consistent with that of an intense γ-ray burst1–3 is shown here to be also consistent with the location of the 1928 optical transient4, the likely optical counterpart of the γ-ray burst source GBS0117 – 29. The probable maximum X-ray luminosity is only 1031 erg s−1 and supports the hypothesis that either γ bursts are produced by accretion instabilities5,6 or, if due to published models for a thermonuclear flash7, they recur with intervals 50 yr. Such long recurrence times may be inconsistent with limits inferred from both the γ burst observations8 and optical data4.

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Grindlay, J., Cline, T., Desai, U. et al. Persistent X-ray emission from a γ-ray burst source. Nature 300, 730–731 (1982). https://doi.org/10.1038/300730a0

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