Astronomy & Astrophysics

Table 1: A summary of the absorbing columns toward MCG-6-30-15. Reference 1 = Elvis et al. (1989), 2 = Reynolds et al. (1997), 3 = Lee et al. (2002).
Type $N_{{\rm H}}$ (cm^-2) Derived from Origin Ref.

Cold $4.06 \times 10^{20}$ soft X-ray cutoff Galaxy 1

?? $4 \times 10^{21}$ reddening intrinsic 2

Warm $\sim$ 10²³ soft X-ray edges and lines intrinsic 3

**Table 1:** A summary of the absorbing columns toward MCG-6-30-15. Reference 1 = Elvis et al. (1989), 2 = Reynolds et al. (1997), 3 = Lee et al. (2002).
Type	$N_{{\rm H}}$ (cm^-2)	Derived from	Origin	Ref.
Cold	$4.06 \times 10^{20}$	soft X-ray cutoff	Galaxy	1
??	$4 \times 10^{21}$	reddening	intrinsic	2
Warm	$\sim$ 10²³	soft X-ray edges and lines	intrinsic	3

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