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Observation of X-ray spectrum of GX301-2
Authors:F Makino  D A Leahy  N Kawai
Institution:(1) Institute of Space and Astronautical Science, 6-1, 4-chome, Komaba Meguro-ku, 153 Tokyo, Japan
Abstract:X-ray source GX301-2 was observed with scintillation proportional counters in binary phase 0.90 to 0.05. Intense iron fluorescent emission and sharp iron K absorption edge appeared in all spectrum including flare, which occured on JD 2445814.6. The equivalent width are linearly correlated with column density and this can be interpreted by a simple model that cold isotropic gas surround compact source. Pulse fraction also changed inversely correlated way with column density which suggest smearing by scattering of x-rays in the reprocessing medium. Averaged iron K absorption edge energy was 7.36±0.02 keV.
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