1. Finnish Centre for Astronomy with ESO, University of Turku , Quantum, Vesilinnantie 5, FI-20014 Turun Yliopisto, Finland
2. Tuorla Observatory, Department of Physics and Astronomy, University of Turku , Quantum, Vesilinnantie 5, FI-20014 Turun Yliopisto, Finland
3. Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research , Mumbai 400005, India
4. Astronomical Observatory, Jagiellonian University , ul. Orla 171, PL-30-244 Krakow, Poland
5. Mt Suhora Observatory, Pedagogical University , ul. Podchorazych 2, PL-30-084 Krakow, Poland
6. Space Science Data Center - Agenzia Spaziale Italiana , via del Politecnico, snc, I-00133 Roma, Italy
7. Instituto Nazionale di Fisica Nucleare , Sezione di Perugia, I-06123 Perugia, Italy
8. European Space Agency European Space Astronomy Centre , E-28691 Villanueva de la Cañada, Madrid, Spain
9. Nordic Optical Telescope , Apartado 474, E-38700 Santa Cruz de La Palma, Spain
10. Astronomical Institute, Osaka Kyoiku University , 4-698 Asahigaoka, Kashiwara, Osaka 582-8582, Japan
11. Dark Sky Observatory, Department of Physics and Astronomy, Appalachian State University , Boone, NC 28608, USA
12. Max-Planck-Institut für Radioastronomie , Auf dem Hügel 69, D-53121 Bonn, Germany
13. Physics Department, University of Perugia , via A. Pascoli, I-06123 Perugia, Italy
14. Astronomical Observatory of Taras Shevshenko National University of Kyiv , Observatorna str 3, UA-04053 Kyiv, Ukraine
15. Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens , Metaxa & Vas. Pavlou St, Penteli, Athens GR-15236, Greece
16. BAA Variable Star Section, West Challow Observatory , OX12 9TX Wantage, UK
17. Instituto de Astrofísica de Andalucía (IAA-CSIC) , P.O. Box 03004, E-18080 Granada, Spain
18. Aritz Bidea No 8 4B (48100) Mungia Bizkaia , E-48100, Spain
19. Muñas de Arriba La Vara , Valdés (MPC J38), E-33780 Valdés, Asturias, Spain
20. Section of Astrophysics, Astronomy and Mechanics, Department of Physics, National and Kapodistrian University of Athens , GR-15784 Zografos, Athens, Greece
21. ICAMER Observatory of NASU , 27, Acad. Zabolotnoho str, UA-03143 Kyiv, Ukraine
22. Max Planck Institute for Astronomy , Koenigstuhl 17, D-69117 Heidelberg, Germany
23. Dept. of Physics, Earth Science, and Space System Engineering, Morehead State University , 235 Martindale Dr, Morehead, KY 40351, USA
24. Department of Physics and Astronomy, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina NC 27599, USA
25. 16 Westminster Close Basingstoke Hampshire RG22 4PP , RG22 4PP Basingstoke, UK
26. Department of Theoretical Physics and Astrophysics, Masaryk University , Kotlarska 2, CZ-61137 Brno, Czech Republic
27. Department of Astronomy, The Ohio State University , 140 West 18th Avenue, Columbus, OH 43210, USA
28. Center for Cosmology and Astroparticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USA
29. Astrophysikalisches Institut und Universitäts-Sternwarte , Schillergässchen 2-3, D-07745 Jena, Germany
30. C/Jaume Balmes No 24 , Cabrils, E-08348 Barcelona, Spain
31. BAA Variable Star Section , 67 Ellerton Road, Kingstanding, Birmingham B44 0QE, UK
32. Indian Institute of Astrophysics , II Block, Koramangala, Bengaluru 560034, India
33. Astronomy and Space Physics Department, Taras Shevshenko National University of Kyiv , Volodymyrska str 60, UA-01033 Kyiv, Ukraine
34. Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Eötvös Loránd Research Network (ELKH), Hungarian Academy of Sciences , Konkoly-Thege Miklós út 15–17, 1121 Budapest, Hungary
35. C/Petrarca 6 1a 41006 Sevilla , E-41006 Sevilla, Spain
36. Faculty of Physics, Astrophysics and Astronomy Teaching Programme, Seville University , E-41004 Seville, Spain
37. Department of Physics, University of Adiyaman , Adiyaman 02040, Turkey
38. Astrophysics Application and Research Center, Adiyaman University , Adiyaman 02040, Turkey
39. Florida International University and SARA Observatory , University Park Campus, Miami, FL 33199, USA
40. Institute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Toruń , ul. Grudziądzka 5, PL-87-100 Toruń, Poland