[1] Space Res Inst, Ul Profsoyuznaya 84-32, Moscow 117997, Russia
[2] Kazan Fed Univ, Ul Kremlevskaya 18, Kazan 420000, Russia
[3] Acad Sci Tatarstan, Ul Baumana 20, Kazan, Russia
[4] TUBITAK Natl Observ, Antalya, Turkey
[5] Russian Acad Sci, Inst Solar Terr Phys, Siberian Branch, POB 291, Irkutsk 664033, Russia
[6] Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, Karachai Cherke, Russia
[7] Max Planck Inst Astrophys, Karl Schwarzschild Str 1,Postfach 1317, D-85741 Garching, Germany