Abstract
The spectral analysis of the persistent X-ray flux from the bright galactic bulge X-ray source and an X-ray burster X1813−14=GX17+2 is presented. A model with a single thermal bremsstrahlung continuum plus iron emission line at ∼6.7 keV fits the lower and higher intensity state data reasonably well. The line feature observed here is reproduced by a single emission line at ∼6.7 keV with intrinsic line width less than 0.7 keV. The equivalent width of the line ranges between 52 and 43 eV, depending on the intensity state of the source. This implies that the observed line is mostly due to helium-like iron (Fexxv). The properties of the line suggest that line-emitting matter is located far outside the neutron star.
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Ercan, E.N. The X-ray spectrum of the bright galactic bulge source X1813−14=GX17+2. Astrophys Space Sci 147, 145–156 (1988). https://doi.org/10.1007/BF00656614
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DOI: https://doi.org/10.1007/BF00656614