Spectral index γ(v_LSR) (green) compared with the WNM fraction T_WNM(v_LSR) /T_{WNM + CNM}(v_LSR) derived from LAB (pink) and EBHIS Gaussians (red) for the MBM 16 field. An upper limit for the Doppler temperature of the CNM of T_D< 1100 K, corresponding to a turbulent CNM Mach number of M_T = 3.7 was applied. We display also with a blue dotted line the WNM fraction T_WNM(v_LSR) /T_{WNM + CNM}(v_LSR) derived from EBHIS, using T_D< 1100 K, for a central position l = 171°,b = −37° within a radius of 1.̊5. This corresponds to the region with CO emission observed by LaRosa et al. (1999, Fig. 1).