Affiliation: | 1. FISBAT Institute, CNR, Via Gobetti 101, 40129, Bologna, Italy;2. Astronomical Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 842 28, Bratislava, Slovak Republic;3. Astronomy and Astrophysics Department, Comenius University, Mlynská dolina, 842 15, Bratislava, Slovak Republic;1. Space Research Institute, Moscow, Russia;2. Saint-Petersburg State University, Russia;3. Sodankylä Geophysical Observatory, Sodankylä, Finland;4. Department of Physics and Astronomy, University of Leicester, Leicester, UK |