Abstract
High time-resolution photometry of the proposed optical counterpart (Star 30)1 of the X-ray source2 2S1254–690 is reported here. An event of high statistical significance was observed from the star that has all the temporal characteristics of an X-ray burst (see, for example, ref. 3). 2S1254–690 has not previously been identified as an X-ray burst source, but its optical counterpart shows properties in common with this class of objects. We also derive the X-ray spectrum of 2S1254–690 using data obtained with the HEAO 1 satellite. The spectrum can be fit in the energy range 0.18–30 keV by a power law of photon index −2.5, modified by interstellar absorption.
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Mason, K., Middleditch, J., Nelson, J. et al. An optical burst from the star identified with the X-ray source 2S1254–690. Nature 287, 516–518 (1980). https://doi.org/10.1038/287516a0
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DOI: https://doi.org/10.1038/287516a0
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