Montes Gutiérrez, DavidRamsey, Lawrence W.Welty, Alan D.2023-06-202023-06-201999-070067-004910.1086/313230https://hdl.handle.net/20.500.14352/59975© 1999. The American Astronomical Society. This research has made use of the SIMBAD data base, operated at CDS, Strasbourg, France. This work has been supported by the Universidad Complutense de Madrid and the Spanish Dirección General de Enseñanza Superior e Investigación Científica (DGESIC) under grant PB97-0259 and by National Science Foundation (NSF) grant AST 92-18008. We also acknowledge, with gratitude, KPNO supporting the FOE presence from 1987 until 1996.We present a library of Penn State Fiber Optic Echelle (FOE) observations of a sample of field stars with spectral types F to M and luminosity classes V to I. The spectral coverage is from 3800 to 10000 Å with a nominal resolving power of 12,000. These spectra include many of the spectral lines most widely used as optical and near-infrared indicators of chromospheric activity such as the Balmer lines (Hα to H epsilon), Ca II H & K, the Mg I b triplet, Na I D_1, D_2, He I D_3, and Ca II IRT lines. There are also a large number of photospheric lines, which can also be affected by chromospheric activity, and temperature-sensitive photospheric features such as TiO bands. The spectra have been compiled with the goal of providing a set of standards observed at medium resolution. We have extensively used such data for the study of active chromosphere stars by applying a spectral subtraction technique. However, the data set presented here can also be utilized in a wide variety of ways ranging from radial velocity templates to study of variable stars and stellar population synthesis. This library can also be used for spectral classification purposes and determination of atmospheric parameters (T_eff, log g, [Fe/H]). A digital version of all the fully reduced spectra is available via ftp and the World Wide Web (WWW) in FITS format.engjournal articlehttp://dx.doi.org/10.1086/313230http://iopscience.iop.org/open access52CA-II-HChromospherically active binariesRS canum venaticorumLine-depth ratiosParameters T-EffAlpha emissionOnline determinationFE/H determinationsSolar neighborhoodArchival dataAstrofísicaAstronomía (Física)