An optical burst from the star identified with the X-ray source 2S1254-690

Details An optical burst from the star identified with the X-ray source 2S1254-690 An optical burst from the star identified with the X-ray source 2S1254-690

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980natur.287..516m&link_type=abstract

Nature, vol. 287, Oct. 9, 1980, p. 516-518. Research supported by the Miller Institute for Basic Research and U.S. Department of

Computer Science

28

Companion Stars, Stellar Spectra, Stellar Spectrophotometry, X Ray Sources, Heao, Interstellar Extinction, Optical Properties, X Ray Spectra

Scientific paper

High time-resolution photometry of the proposed optical counterpart (Star 30) of the X-ray source 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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