Table 2: Best fit parameters relative to Eq. (15). If a normal reddening law is assumed, the X-factors derived from these fits are $\{ 4.21, 3.93, 3.77, 2.91 \} \times 10^{20}~\mbox{cm}^{-2}~\mbox{K}^{-1}~\mbox{km}^{-1}~\mbox{s}$ respectively. The formal, $1\sigma$ errors are $0.002~\mbox{mag}$ and 0.0002 for A_K⁽⁰⁾ and r, respectively (for all four fits).
Fit A_K⁽⁰⁾ r

(mag) ( $\mbox{mag K}^{-1}~\mbox{km}^{-1}~\mbox{s}$ )

Whole sample 0.176 0.0184

$I_{{}^{12}{\rm CO}} > 5~\mbox{K~km~s}^{-1}$ 0.199 0.0172

$A_K > 0.1~\mbox{mag}$ 0.211 0.0165

$A_K \in [0.1, 0.6]~\mbox{mag}$ 0.226 0.0127

**Table 2:** Best fit parameters relative to Eq. (15). If a normal reddening law is assumed, the X-factors derived from these fits are $\{ 4.21, 3.93, 3.77, 2.91 \} \times 10^{20}~\mbox{cm}^{-2}~\mbox{K}^{-1}~\mbox{km}^{-1}~\mbox{s}$ respectively. The formal, $1\sigma$ errors are $0.002~\mbox{mag}$ and 0.0002 for A_K⁽⁰⁾ and r, respectively (for all four fits).
Fit	A_K⁽⁰⁾	r
	(mag)	( $\mbox{mag K}^{-1}~\mbox{km}^{-1}~\mbox{s}$ )
Whole sample	0.176	0.0184
$I_{{}^{12}{\rm CO}} > 5~\mbox{K~km~s}^{-1}$	0.199	0.0172
$A_K > 0.1~\mbox{mag}$	0.211	0.0165
$A_K \in [0.1, 0.6]~\mbox{mag}$	0.226	0.0127

Source LaTeX | All tables | In the text