Based on observations obtained at the W. M. Keck Observatory, which is operated by the Californian Association for Research in Astronomy for the California Institute of Technology and the University of California.

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Based on observations collected at the German-Spanish Astronomical Center (DSAZ), Calar Alto, operated by the Max-Planck-Institut für Astronomie Heidelberg jointly with the Spanish National Commission for Astronomy.

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...

Based on observations collected at the European Southern Observatory (ESO proposal No. 65.H-0341(A)).

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... version

For a description see http://a400.sternwarte.uni-erlangen.de/~ai26/linfit/linfor.html

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...

For the fit of the low resolution spectra the He abundance was kept fixed at the solar value and the projected rotation velocity derived from the high resolution spectra were used.

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