Fig. 4
Solid line: X-ray ionization rate derived with a current X-ray luminosity LX = 2 × 1033erg s-1 in 2−10 keV range (Baganoff et al. 2003) as a function of intervening column density at a distance of d = 2 pc from the X-ray source. X-ray flux in lower energy range is estimated by AtomDB program (Foster et al. 2012), following a similar procedure in Goto et al. (2013) using a plasma temperature of kT = 1.9 keV.
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