All Tables

• Table 1: Column densities and ¹⁶OH/¹⁸OH ratios for the best fit carried out to the ¹⁶OH and ¹⁸OH ground state lines. Columns 1 and 2 show the Gaussian fit parameters from the H I observations of Garwood & Dickey (1989).
• Table 2: Ratio of our derived ¹⁶OH column densities with those of CH from Polehampton et al. (2005) for each of the velocity components from Table 1.
• Table A.1: Log of the observations used.
• Table A.2: Wavelengths and Einstein coefficients (A_ij) for ¹⁶OH and ¹⁸OH averaged over hyperfine structure. The ¹⁶OH wavelengths are from Brown et al. (1982) and Varberg & Evenson (1993) and the Einstein coefficients were calculated from the line strengths of Brown et al. (1982). The ¹⁸OH wavelengths are from Morino et al. (1995) with Einstein coefficients calculated from the line strengths of Comben et al. (1986).