Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS 5-26555, and with the ESO Very Large Telescope + FLAMES at the Paranal Observatory, Chile, under the program 71.D-0076.

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Blecha et al. (2000). See http://girbldrs.sourceforge.net/, for GIRAFFE pipeline, software and documentation.

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... SPECTRUM

The LTE spectral synthesis program freely distributed by Richard O. Gray. Program and documentation available at www.phys.appstate.edu/spectrum/spectrum.html

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... stars

See the GIRAFFE pipeline FAQ web page, http://girbldrs.sourceforge.net/FAQ/index.cgi

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... velocity

Note that the choice of weights and the calculation of the uncertainty in the mean velocity depend both on the velocity dispersion of the cluster and on the uncertainties of the individual velocities (see Pryor & Meylan 1993). A much more careful analysis will be done in our future work on the internal dynamics.

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