All Tables

Table 1: Table showing sightline data for $\lambda$ 8037 observations. For the E_B-V values, B-V photometry are from Perryman & ESA (1997) and spectral types from the modal averages of all data referenced in the SIMBAD database (URL: http://simbad.u-strasbg.fr/sim-fid.pl); intrinsic stellar photometry is from Wegner (1994) with the exception of Cyg OB2 5 and 8a for which photometry was taken from Massey & Thompson (1991) and Cyg OB2 12 which is of uncertain spectral type and photometry as discussed by Gredel & Munch (1994). Approximate stellar distances d (accurate to around $\pm$ 50%), were calculated from the spectral types and absolute magnitudes of Wegner (2006) (stellar apparent magnitudes were dereddened assuming a ratio of visual to selective extinction ( $R_{\rm V}$ ) of 3.1).
Table 2: Least-squares fit parameters of the $\lambda$ 8037 CH₂CN^- models shown in Fig. 3. The mean LSR velocity ( $v_{\rm LSR}$ / km s^-1), Doppler cloud width (b/km s^-1) and equivalent width of the model $\lambda$ 8037 DIB (W₈₀₃₇/mÅ) are given along with the normalised continuum rms of the observed spectra ( $\sigma _{\rm c}$ ), and the rms of the model fit residuals ( $\sigma _{\rm f}$ ).