1. Department of Physics & Astronomy, Jodrell Bank Centre for Astrophysics, University of Manchester , Oxford Road, Manchester M13 9PL , UK
2. Oxford Astrophysics, Department of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH , UK
3. European Space Agency (ESA), European Space Astronomy Centre (ESAC) , Camino Bajo del Castillo s/n E-28692 Villanueva de la Cañada, Madrid , Spain
4. The Alan Turing Institute , 96 Euston Road, London NW1 2DB , UK
5. Department of Physics and Astronomy, Haverford College , 370 Lancaster Avenue, Haverford, Pennsylvania 19041 , USA
6. South African Radio Astronomy Observatory (SARAO) , Black River Park North, 2 Fir St, Cape Town 7925 , South Africa
7. School of Physical Sciences, The Open University , Milton Keynes, MK7 6AA , UK
8. School of Physics and Astronomy, University of Minnesota , Minneapolis, Minnesota 55455 , USA
9. Minnesota Institute for Astrophysics, University of Minnesota , Minneapolis, Minnesota 55455 , USA
10. Department of Physics, Lancaster University , Lancaster LA1 4YB , UK
11. Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH , UK