Fig. 3. a Spectral interval spanning the C II  -  (904.48 Å) multiplet with component identification. Ordinate scale as for Fig. 1a. b Branching line intensity ratios vs raster position. The upper set of values with error bars corresponds to the I(3/2-3/2)/I(1/2-3/2) ratio and the lower set of values to the I(1/2-1/2)/I(3/2-1/2) ratio. The solid lines show the corresponding A-value ratios.