Fig. 5.
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Upper limit of intrinsic LX corresponding to three counts (the 95% upper limit obtained from a 60 ks exposure) for a different assumed spectral slope, Γ. LX is the unabsorbed, rest-frame 2−10 keV luminosity. Examples for three values of photon index, Γ = 1.6 (dotted line), 2.0 (dashed line), or 2.4 (dash-dotted line), as a function of NH are shown.
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