Spectra of the Cha I sources. The three parts of the spectrum are displayed in different colours (EFOSC2 grism #16 in green, SofI blue grism in blue, and SofI red grism in red). The spectra were offset and some of them were multiplied by a scale factor s (indicated in parentheses) for better visualisation. Wavelength intervals heavily corrupted by atmospheric absorption were removed. The position of the main emission lines present in the covered spectral range is indicated.