  We present 63 Solar analogues and twins for which high S/N archival data are
available for the HARPS high resolution spectrograph at the ESO 3.6m telescope.
We perform a differential analysis of these stellar spectra relative to the
Solar spectrum, similar to previous work using ESO 2.2m/FEROS data, and expand
our analysis by introducing a new method to test the temperature and
metallicity calibration of Sun-like stars in the Geneva-Copenhagen-Survey
(GCS). The HARPS data are significantly better than the FEROS data, with
improvements in S/N, spectral resolution, and number of lines we can analyse.
We confirm the offsets to the photometric scale found in our FEROS study. We
confirm 3 Solar twins found in the FEROS data as Solar twins in the HARPS data,
as well as identify 6 new twins.
