Chromospheric Ca II emission in nearby F, G, K, and M stars

We present chromospheric Ca II H and K activity measurements, rotation periods, and ages for similar to1200 F, G, K, and M type main-sequence stars from similar to18,000 archival spectra taken at Keck and Lick Observatories as a part of the California and Carnegie Planet Search Project. We have calibrated our chromospheric S-values against the Mount Wilson chromospheric activity data. From these measurements we have calculated median activity levels and derived R'(HK), stellar ages, and rotation periods from general parameterizations for 1228 stars, similar to1000 of which have no previously published S-values. We also present precise time series of activity measurements for these stars.