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X-Ray Spectrum of Scorpius X-1 Obtained with a Bragg Crystal Spectrometer
The Astrophysical Journal1971Vol. 164, pp. L87–L87
Citations Over TimeTop 10% of 1971 papers
Abstract
A measurement of the spectrum of Sco X-1 in the range 2.4-2.9 keV made with a high-resolution Bragg spectrometer shows no emission or absorption features. The La line of hydrogenic sulfur at 2.6 keV is found to have an equivalent width <2.2 eV, a factor 8 less than that predicted for an optically thin plasma at the observed temperature of 8 X 10' K. The result is explained by a high-density model for the source in which the line is weakened by electron scattering.
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