[1] Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland
[2] Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany
[3] Yerevan State Univ, 1 Alek Manukyan St, Yerevan 0025, Armenia
[4] Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany
[5] Univ Groningen, Kapteyn Astron Inst, Landleven 12, NL-9747 AD Groningen, Netherlands
[6] Inst Polytech Paris, CNRS, Lab Leprince Ringuet, Ecole Polytech, F-91128 Palaiseau, France
[7] Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 10005, Namibia
[8] North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa
[9] Deutsch Elektronen Synchrotron DESY, Platanenallee 6, D-15738 Zeuthen, Germany
[10] Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany
[11] Univ Paris, CNRS, Astroparticule & Cosmol, F-75013 Paris, France
[12] Linnaeus Univ, Dept Phys & Elect Engn, S-35195 Vaxjo, Sweden
[13] Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany
[14] Sorbonne Univ, Lab Phys Nucl & Hautes Energies, CNRS IN2P3, LPNHE, 4 Pl Jussieu, F-75005 Paris, France
[15] Univ Paris Saclay, IRFU, CEA, F-91191 Gif Sur Yvette, France
[16] Univ Oxford, Dept Phys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England
[17] Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Nikolaus Fiebiger Str 2, D-91058 Erlangen, Germany
[18] Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland
[19] Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa
[20] Univ Paris Cite, Univ PSL, CNRS, Lab Univers & Theories,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France
[21] Univ Montpellier, Lab Univers & Particules Montpellier, CNRS IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France
[22] Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia
[23] Western Sydney Univ, Sch Sci, Locked Bag 1797, Penrith, NSW 2751, Australia
[24] Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany
[25] Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany
[26] Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland
[27] Nicolaus Copernicus Univ, Inst Astron, Fac Phys Astron & Informat, Grudziadzka 5, PL-87100 Torun, Poland
[28] Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland
[29] Aix Marseille Univ, CPPM, CNRS IN2P3, Marseille, France
[30] Univ Bordeaux, CNRS, LP2I Bordeaux, UMR 5797, F-33170 Gradignan, France
[31] Univ Innsbruck, Inst Astro & Teilchenphys, Technikerstr 25, A-6020 Innsbruck, Austria
[32] Yerevan Phys Inst, 2 Alikhanian Bros St, Yerevan 0036, Armenia
[33] RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
[34] Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands