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Astron. Astrophys. 319, 664-668 (1997) AcknowledgementsWe thank very much Dr. I.M. Bockstein for helping us with the image processing and Dr. M.A. Livshits for extended discussion and comments. This work was supported by the grants No. 94-02-03381 and No. 96-02-18383 of the Russian Foundation of Basic Research and by the VEGA grants Nos. 02/2004/95 and 02/2007/95 of the Slovak Academy of Sciences.
© European Southern Observatory (ESO) 1997 Online publication: July 3, 1998 ![]() |