1. Instituto de Astronomía Teórica y Experimental, (IATE-UNC), X5000BGR Córdoba, Argentina
2. Instituto de Radioastronomía y Astrofísica (IRyA-UNAM), 58089 Morelia, Mexico
3. Institut de Ciències de l’Espai (ICE, CSIC), Can Magrans s/n, E-08193 Cerdanyola del Vallès, Spain
4. Institut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, Spain
5. Department of Earth and Space Sciences, Chalmers University of Technology, SE-43992 Onsala, Sweden
6. INAF–Osservatorio Astronomico di Cagliari, Via della Scienza 5, I-09047 Selargius (CA), Italy
7. Instituto de Astrofísica de Andalucía, CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, Spain
8. Instituto de Astronomía, Universidad Nacional Autónoma de México (UNAM), Apartado Postal 70-264, 04510 México, DF, Mexico
9. ALLEGRO/Leiden Observatory, Leiden University, P.O. Box 9513, NL-2300 RA Leiden, the Netherlands
10. Department of Astrophysics/IMAPP, Radboud University Nijmegen, P.O. Box 9010, NL-6500 GL Nijmegen, the Netherlands
11. Korea Astronomy and Space Science Institute, 776 Daedeokdaero, Yuseong, Daejeon 305-348, Republic of Korea
12. Joint Institute for VLBI ERIC (JIVE), Oude Hoogeveensedijk 4, NL-7991 PD Dwingeloo, the Netherlands
13. Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, the Netherlands