Maps (top) and histograms (bottom) of the raw FWHM (in km s^-1) of three CN hf lines obtained from Gaussian fits to each spectrum. Only spectra with an area S/N larger than seven were kept. The contours (top panels) show the locus of constant kinetic temperature (15, 20, 25 K) adopting FWHM/2.35 = (2kT_k/μ)^{1 / 2}. The distance to the source is 59.5 pc and the effective velocity resolution is 107 m/s.