A relativistic iron line in the X-ray spectrum of the atoll source 4U 1705-44questionMark
收藏ESA Earth Online2026-06-22 收录
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We propose to observe with XMMNewton in AO5 the atoll source 4U 170544. The Chandra observation of this source clearly indicates the presence of a broad(sigma about 0.7 keV) iron line. Both a relativistic disk line and a thermalComptonization broadening fit well the line profile. The superior sensitivity atthe iron line energy of XMMNewton is needed to give a definite answer to theproblem of the origin of the broad iron line.
