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DIBs are ubiquitous in stellar spectra. Traditionally, they have been studiedthrough their extraction from hot stars, because of their smooth continuum. Inan era where there are several going-on or planned massive Galactic surveysusing multi-object spectrographs, cool stars constitute an appealing set oftargets. From the technical point of view, the extraction of DIBs in theirspectra is more challenging due to the complexity of the continuum. In thiscontribution we will provide the community with an improved set of stellarlines in the spectral regions associated to the strong DIBs at l6196, l6269,l6284, and l6379. These lines will allow for the creation of better stellarsynthetic spectra, reproducing the background emission and a more accurateextraction of the magnitudes associated with a given DIB. The Sun and Arcturuswere used as representative examples of dwarf and giant stars, respectively. Ahigh quality spectrum for each of them was modeled using TURBOSPECTRUM and theVALD stellar line list. The oscillator strength log(gf) and/or wavelength ofspecific lines were modified to create synthetic spectra where the residuals inboth the Sun and Arcturus were minimized. The synthetic spectra based on theimproved line lists reproduce the observed spectra for the Sun and Arcturus inthe mentioned spectral ranges with greater accuracy. Residuals between thesynthetic and observed spectra are always <10%, much better than withpreviously existing options. The new line list has been tested with somecharacteristic spectra, from a variety of stars, including both giant and dwarfstars, and under different degrees of extinction. As it happened with the Sunand Arcturus residuals in the fits used to extract the DIB information aresmaller when using synthetic spectra made with the updated line lists. Tableswith the updated parameters are provided to the community.

Measuring Diffuse Interstellar Bands with cool stars. An improved line list to model the background stellar spectra