Yihong Wu¹, Alexis P Rouillard², Athanasios Kouloumvakos¹, Rami O Vainio³, Alexandr N. Afanasiev⁴, Illya Plotnikov¹, Gerald H Share⁵, Ronald J Murphy⁶, Gottfried Johannes Mann⁷ and Alexander Warmuth⁸, (1)IRAP, Toulouse, France, (2)IRAP/CNRS, Toulouse, France, (3)University of Turku, Department of Physics and Astronomy, Turku, Finland, (4)University of Turku, Turku, Finland, (5)University of Maryland, Astronomy, Silver Spring, MD, United States, (6)US Naval Research Laboratory, Washington, DC, United States, (7)Astrophys Inst Potsdam, Potsdam, Germany, (8)Leibniz Institute for Astrophysics Potsdam, Potsdam, Germany