[1] Univ Salerno, Dipartimento Farm, I-84084 Salerno, Italy
[2] Complesso Univ Monte S Angelo, Sez Napoli, Ist Nazl Fis Nucl, I-80126 Naples, Italy
[3] Friedrich Schiller Univ Jena, Theoret Phys Inst, D-07743 Jena, Germany
[4] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy
[5] Univ Torino, Dipartimento Fis, I-10125 Turin, Italy
[6] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy
[7] Univ Napoli Federico II, Complesso Univ Monte S Angelo, I-80126 Naples, Italy
[8] Univ Lyon, Univ Claude Bernard Lyon 1, Inst Lumiere Matiere, CNRS, F-69622 Villeurbanne, France
[9] Univ Barcelona, Inst Ciencies Cosmos ICCUB, C Marti i Franques 1, Barcelona 08028, Spain
[10] Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS, IN2P3, F-74000 Annecy, France
[11] Barcelona Inst Sci & Technol, Inst Fis Altes Energies IFAE, E-08193 Barcelona, Spain
[12] ICREA, E-08193 Barcelona, Spain
[13] Gran Sasso Sci Inst GSSI, I-67100 Laquila, Italy
[14] Univ Udine, Dipartimento Sci Matemat Informat & Fis, I-33100 Udine, Italy
[15] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy
[16] Univ Cote Azur, Observ Cote Azur, CNRS, Artemis, F-06304 Nice, France
[17] Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands
[18] Univ Amsterdam, Inst High Energy Phys, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands
[19] Natl & Kapodistrian Univ Athens, Sch Sci Bldg,2nd Floor, Panepistimiopolis 15771, Ilissia, Greece
[20] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy
[21] Univ Camerino, Dipartimento Fis, I-62032 Camerino, Italy
[22] Univ Paris, Astroparticule & Cosmol, CNRS, F-75006 Paris, France
[23] Univ Paris Saclay, IJCLab, CNRS IN2P3, F-91405 Orsay, France
[24] European Gravitat Observ EGO, I-56021 Pisa, Italy
[25] Univ Urbino Carlo Bo, I-61029 Urbino, Italy
[26] Ist Nazl Fis Nucl, Sez Firenze, I-50019 Florence, Italy
[27] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy
[28] Univ Lyon, Univ Claude Bernard Lyon 1, CNRS, IP2I Lyon,IN2P3,UMR 5822, F-69622 Villeurbanne, France
[29] Catholic Univ Louvain, B-1348 Louvain La Neuve, Belgium
[30] Nikhef, Sci Pk 105, NL-1098 XG Amsterdam, Netherlands
[31] Univ Utrecht, Inst Gravitat & Subat Phys GRASP, Princetonpl 1, NL-3584 CC Utrecht, Netherlands
[32] Univ Liege, B-4000 Liege, Belgium
[33] Univ Milano Bicocca, I-20126 Milan, Italy
[34] Ist Nazl Fis Nucl, Sez Milano Bicocca, I-20126 Milan, Italy
[35] INAF, Osservatorio Astron Brera Sede Merate, I-23807 Merate, Lecco, Italy
[36] Univ Salerno, Scuola Med Salernitana, Dipartimento Med Chirurg & Odontoiatria, I-84081 Salerno, Italy
[37] RMKI, Wigner RCP, Konkoly Thege Miklos Ut 29-33, H-1121 Budapest, Hungary
[38] Univ Pisa, I-56127 Pisa, Italy
[39] Univ Perugia, I-06123 Perugia, Italy
[40] Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy
[41] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy
[42] Univ Ghent, B-9000 Ghent, Belgium
[43] Polish Acad Sci, Nicolaus Copernicus Astron Ctr, PL-00716 Warsaw, Poland
[44] Univ Sannio, Dipartimento Ingn, I-82100 Benevento, Italy
[45] Univ Autonoma Barcelona, Fac Ciencias, Dept Matemat, Edificio C, Bellaterra 08193, Barcelona, Spain
[46] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy
[47] Vrije Univ Amsterdam, NL-1081 HV Amsterdam, Netherlands
[48] Univ Trento, Dipartimento Fis, I-38123 Trento, Italy
[49] Trento Inst Fundamental Phys & Applicat, Ist Nazl Fis Nucl, I-38123 Povo, Trento, Italy
[50] Univ Salerno, Dipartimento Fis ER Caianiello, I-84084 Salerno, Italy