Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B-9000 Gent, Belgium

[email protected]

Groupe de Recherche en Physique Atomique et Astrophysique, Institut National des Sciences Appliquées et de Technologie, Centre Urbain Nord, B. P. No 676, 1080, Tunis Cedex, Tunisia

Department of Astronomy, University of Maryland, College Park, MD 20742, USA

Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

G2E lab, Université Joseph Fourier, 25 rue des Martyrs, 38042 Grenoble, France

Radiophysics Dept. Taras Schevchenko Kyiv National University, 64, Volodymyrs’ka str. Kyiv 01033 Ukraine

Grupo de Espectroscopía de Plasmas, Dpto. de Física, Edificio Einstein (C-2), planta baja, Campus de Rabanales, Universidad de Côrdoba, 14071

Côrdoba, Spain

Penn State University, Department of Astronomy and Astrophysics, 525 Davey Lab, University Park, PA 16802, USA

Queen’s University Belfast

Department of Applied Physics, Technical University of Sofia, 8, Kl. Ohridski Blvd., BG-1000 Sofia, Bulgaria

Dipartimento di Astronomia, Università di Padova, Vicolo dell’Osservatorio 2, 35122 Padova, Italy

Dipartimento di Astronomia, Universita di Padova, Vicolo Osservatorio, 3 35122 Padova, Italy

Faculty of Transport and Traffic Engineering, University of Belgrade, Vojvode Stepe 305, Belgrade, Serbia

Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

University of Athens, Faculty of Physics, Department of Astrophysics, Astronomy and Mechanics Panepistimiopolis, Zografos 157 84, Athens, Greece

Astronomical Observatory Trieste

Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

Faculty of Physics, University of Belgrade, Studentski trg 12, Belgrade, Serbia

Groupe de Recherche en Physique Atomique et Astrophysique, Faculté des Sciences de Bizerte, 7021 Zarzouna, Bizerte, Tunisia

The Pennsylvania State, University Department of Astronomy, 525 Davey Lab, University Park, PA 16802, U.S.A.

Astronomy Department, University of Texas, Austin, TX 78712-0259, USA

Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

Central Astronomical Observatory at Pulkovo, 196140, Pulkovskoe Shosse 65/1, Saint-Petersburg, Russia

Groupe de Recherche en Physique Atomique et Astrophysique, Institut National des Sciences Appliquées et de Technologie, Centre Urbain Nord, B. P. No 676, 1080, Tunis Cedex, Tunisia

Institut für Astrophysik Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany

Department of Astronomy, Faculty of Mathematics, University of Belgrade, Studentski trg 16, Belgrade, Serbia

Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

Aristotle University of Thessaloniki, GR-54124 Thessalonniki, Greece

Moscow State University, Sternberg Astronomical Institute, 119992, Universitetski pr., 13, Moscow, Russia

St Petersburg State University, Research Institute of Physics 1, Ulianovskaya Ul., Peterhoff, St. Petersburg, 198504, Russia

Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

Department of Astronomy, Faculty of Mathematics, University of Belgrade, Studentski trg 16, Belgrade, Serbia

Faculty of Physics, University of Belgrade, Studentski trg 12, Belgrade, Serbia

Dipartimento di Astronomia, Università di Padova, Vicolo dell’Osservatorio 2, 35122 Padova, Italy

University of Athens, Faculty of Physics, Department of Astrophysics, Astronomy and Mechanics, Panepistimiopolis, Zografos 157 84, Athens, Greece

Groupe de Recherche en Physique Atomique et Astrophysique, Faculté des Sciences de Bizerte, 7021 Zarzouna, Bizerte, Tunisia

Institute of Physics, Pregrevica 118, Zemun, Belgrade, Serbia

Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

Special Astrophysical Observatory of RAS, Nizhnij Arkhyz, Zelenchukskaya, Karachaevo-Cherkesia, Russia 369167

Grupo de Espectroscopía de Plasmas, Dpto. de Física, Edificio Einstein (C-2), planta baja, Campus de Rabanales, Universidad de Cordoba, 14071 Cordoba, Spain

Sterrenkundig Observatorium, Universiteit of Gent, Krijgslaan 281 S9, WE03, B-9000 Gent, Belgium

Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

Faculty of Physics, University of Belgrade, Studentski trg 12, Belgrade, Serbia

European Southern Observatory, Alonso de Córdova 3107, Vitacuar, Santiago 19001, Chile

Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK

Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

Faculty of Physics, University of Belgrade, Studentski trg 12, Belgrade, Serbia

Dipartimento di Astronomia, Università di Padova, Vicolo dell’Osservatorio 2, 35122 Padova, Italy

Observatoire de Paris, Lerma 5 Place Jules Janssen, F-92195 Meudon Cedex, France

Institute of Physics, Pregrevica 118, Zemun, Belgrade, Serbia

Tartu Observatory, T˜oravere, Tartumaa 61602, Estonia

Tartu Observatory, T˜oravere, Tartumaa 61602, Estonia

Special Astrophysical Observatory of the Russian AS, Nizhnij Arkhyz, Karachaevo-Cherkesia 369167, Russia

Department of Physics, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac

Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

Special Astrophysical Observatory of RAS, Nizhnij Arkhyz, Zelenchukskaya, Karachaevo-Cherkesia, Russia 369167

Institute of Physics, Pregrevica 118, Zemun, Belgrade, Serbia

Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

Université de Provence PIIM, centre Saint Jérôme, case 232, 13397 Marseille cedex 20, France

University of Alabama, Instituto de Astrofisica de Andalucia, CSIC, Apdo. 3004, Granada, Spain

LESIA Observatoire de Paris, Section de Meudon, 5, place Jules Janssen, Meudon Cedex, 92195, France

Astronomical Observatory Belgrade Volgina 7, Belgrade, Serbia

Institut f¨ur Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany

State Scientific Center - Institute of Theoretical and Experimental Physics B. Cheremushkinskaya, 25, Moscow, 117259, Russia