1. Institute of Space Sciences (ICE , CSIC), Campus UAB, Carrer de Can Magrans s/n, E-08193 Barcelona, Spain
2. Institut d’Estudis Espacials de Catalunya (IEEC) , Carrer Gran Capità 2–4, E-08034 Barcelona, Spain
3. Università degli Studi di Palermo, Dipartimento di Fisica e Chimica , via Archirafi 36, I-90123 Palermo, Italy
4. INAF/IASF Palermo , via Ugo La Malfa 153, I-90146 Palermo, Italy
5. Università degli Studi di Cagliari, Dipartimento di Fisica , SP Monserrato-Sestu km 0.7, I-09042 Monserrato, Italy
6. Department of Astronomy, University of Maryland , College Park, MD 20742, USA
7. Astrophysics Science Division , NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
8. CNRS , IRAP, 9 avenue du Colonel Roche, BP 44346, F-31028 Toulouse Cedex 4, France
9. Université de Toulouse , CNES, UPS-OMP, F-31028 Toulouse, France
10. Instituto Argentino de Radioastronomía (CCT-La Plata , CONICET; CICPBA), C.C. No. 5, 1894 Villa Elisa, Argentina
11. Facultad de Ciencias Astronómicas y Geofísicas , Universidad Nacional de La Plata, Paseo del Bosque s/n, 1900 La Plata, Argentina
12. MIT Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA
13. School of Physics and Astronomy, University of Southampton , Southampton SO17 1BJ, UK
14. Joint Space-Science Institute , NASA’s Goddard Space Flight Center, Greenbelt, MD 20771, USA