Astron. Astrophys. 318, L59-L61 (1997)

Acknowledgements

Z.-R. Wang would like to express her gratitude to Mr. Y. Zhao in Nanjing University for his help in looking for the historical literature, and also to Dr. R. Strom for his valuable and helpful comments and suggestions. This work was carried out on the SUN workstation at the Laboratory for Astronomical Data Analysis of the Department of Astronomy, Nanjing University. This work was supported by the Ascent Project of the State Scientific Commission of China, the National Natural Science Foundation of China, and a grant from the State Education Commission of China.

© European Southern Observatory (ESO) 1997

Online publication: July 8, 1998
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