Author affiliations
1 Obserwatorium Astronomiczne Uniwersytetu Warszawskiego, Aleje Ujazdowskie 4, 00-478 Warszawa, Poland
2 Princeton University Observatory, Peyton Hall, Princeton, NJ 08544
3 Departamento de Fisica, Universidad de Concepción, Casilla 160-C, Concepción, Chile
4 Jodrell Bank Observatory, University of Manchester, Macclesfield, Cheshire SK11 9DL, UK
5 Auckland Observatory, P.O. Box 24-180, Auckland 1030, New Zealand
6 Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210
7 Department of Astronomy, Mail Code 105-24, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125
8 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138
9 Department of Physics, Institute for Basic Science Research, Chungbuk National University, Cheongju 361-763, Korea
10 Department of Astrophysics, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024
11 Farm Cove Observatory, Center for Backyard Astrophysics, 2/24 Rapallo Place, Pakuranga, Auckland 1706, New Zealand
12 Bohyunsan Optical Astronomy Observatory, Korea Astronomy and Space Science Institute, Jaecheon P.O. Box 1, Yeongcheon 770-820, Korea
13 Department of Physics, 225 Nieuwland Science Hall, Notre Dame University, Notre Dame, IN 46556
14 Institute for Information and Mathematical Sciences, Massey University, Private Bag 102-904, Auckland 1330, New Zealand
15 Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
16 Department of Physics, University of Auckland, Private Bag 92-019, Auckland 1001, New Zealand
17 Institut d'Astrophysique de Paris, 98 bis Boulevard Arago, F-75014 Paris, France
18 Scottish Universities Physics Alliance, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, UK
19 Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD, UK
20 School of Mathematics and Physics, University of Tasmania, Private Bag 37, Hobart, Tasmania 7001, Australia
21 Institut für Physik, Universität Potsdam, Am Neuen Palais 10, D-14469 Potsdam, Germany
