1. Jodrell Bank Centre for Astrophysics, The University of Manchester , Alan Turing Building, Manchester M13 9PL , UK
2. Max Planck Institute for Gravitational Physics (Albert Einstein Institute) , D-30167 Hannover , Germany
3. Leibniz Universität Hannover , D-30167 Hannover , Germany
4. INAF - Osservatorio Astronomico di Cagliari , via della Scienza 5, I-09047 Selargius (CA) , Italy
5. Center for Data Intensive and Time Domain Astronomy, Department of Physics and Astronomy, Michigan State University , East Lansing, MI 48824 , USA
6. Department of Physics, National Cheng Kung University , No. 1 University Road, Tainan City 70101 , Taiwan
7. Max-Planck-Institut für Radioastronomie , D-53121 Bonn , Germany
8. South African Radio Astronomy Observatory , 2 Fir Street, Cape Town 7925 , South Africa
9. Department of Physics and Astronomy, University of Sheffield , Sheffield S3 7RH , UK
10. Instituto de Astrofísica de Canarias , E-38205 La Laguna, Tenerife , Spain
11. Department of Astronomy, University of Maryland , College Park, MD 20742 , USA
12. Center for Research and Exploration in Space Science & Technology II (CRESST II) , NASA/GSFC, Greenbelt, MD 20771 , USA
13. NASA Goddard Space Flight Center , Greenbelt, MD 20771 , USA
14. LPC2E - Université d’Orléans / CNRS , F-45071 Orléans cedex 2 , France
15. Observatoire Radioastronomique de Nançay (ORN), Observatoire de Paris, Université PSL , Univ Orléans, CNRS, F-18330 Nançay , France
16. School of Physics, Kane Building, University College Cork , Cork T12 K8AF , Ireland
17. Institute for Defense Analyses , 730 E Glebe Rd, Alexandria, VA 22305 , USA
18. National Astronomical Research Institute of Thailand , Don Kaeo, Mae Rim, Chiang Mai 50180 , Thailand