Library of high and mid-resolution spectra in the CaII H & K, H{alpha},   H{beta}, NaI D{1}, D{2}, and HeI D{3} line regions of F, G, K and M field   stars
  In this work we present spectroscopic observations centered in the spectral lines most widely used as optical indicators of chromospheric activity (H{alpha}, H{beta}, Ca II H & K, and He I D{3}) in a sample of F, G, K and M chromospherically inactive stars. The spectra have been obtained with the aim of providing a library of high and mid-resolution spectra to be used in the application of the spectral subtraction technique to obtain the active-chromosphere contribution to these lines in chromospherically active single and binary stars. This library can also be used for spectral classification purposes. A digital version with all the spectra is available via ftp and the World Wide Web (WWW) in both ASCII and FITS formats 
D. Montes (1), E.L. Martin (2), M.J. Fernandez-Figueroa (1), M.   Cornide (1), E. De Castro (2) ((1) Dept. Astrofisica UCM, ...