Astron. Astrophys. 360, 627-632 (2000)

Acknowledgements

This research has made use of the AFOEV database, operated at CDS (France), VSNET database (Japan), VSOLJ database (Japan) and NASA's Astrophysics Data System Abstract Service. I thank Dr. Hudec for reading the manuscript and for his comments. I am also indebted to Dr. Harmanec for providing me with the program HEC13. Naturally, I am also thankful to the numerous amateur observers worldwide whose observations made this analysis possible. This investigation was supported by the post-doctoral grant 205/00/P013 of the Grant Agency of the Czech Republic and by the Project KONTAKT ME 137 by the Ministry of Education and Youth of the Czech Republic.

© European Southern Observatory (ESO) 2000

Online publication: August 17, 2000
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