Based on observations collected at the European Southern Observatory, Chile (Proposal ESO NM-0 68.A-0116).

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IRAF is distributed by the National Optical Astronomy Observatories, which are operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation.

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... center

The center of the cluster was derived by a two-dimensional adaptive kernel technique from the spectroscopically confirmed cluster members (for details see Paper I) and coincides with the cD position.

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