Telluric correction and profile fitting of the Coudé spectrum of HD 2151. Left panel:corrected and non-corrected spectra are represented by the black and blue lines, respectively. The windows of fits are represented by the shades, and the arrows point to those windows where the relative flux was perfectly recovered. The red line represents the fitted synthetic profile. Right panel: histogram of temperatures related to the wavelength bins inside the windows of fits. The most probable is shown in the top part of the plots, also log g and [Fe/H] values used for the fittings along with their source in the literature are shown.