Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A

Jenni Adams,J. Aguilar,M. Ahlers,Maryon Ahrens,Imen Samarai,David Altmann,K. Andeen,Tyler Anderson,Isabelle Ansseau,G. Anton,C. Argüelles,J. Auffenberg,Spencer Axani,H. Bagherpour,X. Bai,J. Barron,S. Barwick,Volker Baum,R. Bay,J. Beatty,Karl Becker,J. Tjus,S. BenZvi,D. Berley,E. Bernardini,D. Besson,G. Binder,D. Bindig,E. Blaufuss,S. Blot,C. Böhm,Mathis Boerner,Fabian Bos,Sebastian Boeser,O. Botner,Etienne Bourbeau,J. Bourbeau,Federica Bradascio,Jim Braun,M. Brenzke,Hans-Peter Bretz,S. Bron,Jannes Brostean-Kaiser,A. Burgman,Raffaela Busse,T. Carver,E. Cheng,D. Chirkin,A. Christov,K. Clark,Lew Classen,S. Coenders,Gabriel Collin,J. Conrad,Paul Coppin,Pablo Correa,Doug Cowen,R. Cross,Pranav Dave,Melanie Day,J. André,C. Clercq,James DeLaunay,Hans Dembinski,Sam DeRidder,P. Desiati,K. Vries,G. Wasseige,Meike DeWith,T. DeYoung,J. Díaz–Vélez,V. Lorenzo,Hrvoje Dujmović,Jonathan Dumm,M. Dunkman,Emily Dvorak,B. Eberhardt,Thomas Ehrhardt,Bjorn Eichmann,P. Eller,P. Evenson,S. Fahey,A. Fazely,John Felde,Kirill Filimonov,C. Finley,S. Flis,A. Franckowiak,Elizabeth Friedman,Alexander Fritz,T. Gaisser,Jay Gallagher,L. Gerhardt,K. Ghorbani,Theo Glauch,T. Gluesenkamp,A. Goldschmidt,Javier González,Darren Grant,Zachary Griffith,C. Haack,A. Hallgren,F. Halzen,K. Hanson,D. Hebecker,David Heereman,K. Helbing,Robert Hellauer,Stephanie Hickford,Joshua Hignight,G. Hill,Kara Hoffman,R. Hoffmann,Tobias Hoinka,Benjamin Hokanson-Fasig,Kotoyo Hoshina,F. Huang,M. Huber,K. Hultqvist,Mirco Huennefeld,Raamis Hussain,Seongjin In,N. Iovine,A. Ishihara,E. Jacobi,G. Japaridze,Minjin Jeong,Kyle Jero,B. Jones,P. Kalaczyński,W. Kang,A. Kappes,David Kappesser,T. Karg,A. Karle,U. Katz,M. Kauer,A. Keivani,J. Kelley,Ali Kheirandish,Jonghyun Kim,M. Kim,T. Kintscher,J. Kiryluk,T. Kittler,S. Klein,R. Koirala,H. Kolanoski,L. Koepke,C. Kopper,Sandro Kopper,Jan Koschinsky,D. Koskinen,M. Kowalski,K. Krings,M. Kroll,Gerald Krueckl,S. Kunwar,Naoko Neilson,T. Kuwabara,Alexander Kyriacou,M. Labare,J. Lanfranchi,Michael Larson,F. Lauber,K. Leonard,M. Lesiak-Bzdak,M. Leuermann,Qinrui Liu,Cristian Mariscal,L. Lu,J. Luenemann,William Luszczak,J. Madsen,Giuliano Maggi,Kendall Mahn,S. Mancina,R. Maruyama,Keiichi Mase,Ryan Maunu,K. Meagher,Morten Medici,Maximilian Meier,Thorben Menne,O. López,Thomas Meures,S. Miarecki,Jessie Micallef,G. Momenté,T. Montaruli,M. Morello,R. Morse,Marjon Moulai,R. Nahnhauer,P. Nakarmi,Uwe Naumann,G. Neer,H. Niederhausen,Sarah Nowicki,Dave Nygren,A. Pollmann,Alex Olivas,Aongus Murchadha,Erin O’Sullivan,Tomasz Palczewski,H. Pandya,D. Pankova,Peter Peiffer,James Pepper,C. Heros,D. Pieloth,E. Pinat,M. Plum,Buford Price,G. Przybylski,Christoph Raab,Leif Raedel,M. Rameez,L. Rauch,Katherine Rawlins,I. Rea,R. Reimann,B. Relethford,Matt Relich,W. Rhode,Wolfgang Rhode,Mike Richman,Sally Robertson,M. Rongen,C. Rott,Tim Ruhe,D. Ryckbosch,D. Rysewyk,Ibrahim Safa,Tobias Saelzer,Sebastian Sánchez,Alexander Sandrock,J. Sandroos,Marcos Santander,Sourav Sarkar,S. Sarkar,Konstancja Satalecka,P. Schlunder,Torsten Schmidt,A. Schneider,S. Schoenen,S. Schöneberg,L. Schumacher,Stephen Sclanfani,D. Seckel,S. Seunarine,Jan Soedingrekso,Dennis Soldin,Ming Song,G. Spiczak,Christian Spiering,J. Stachurska,M. Stamatikos,T. Stanev,A. Stasik,Robert Stein,J. Stettner,A. Steuer,T. Stezelberger,R. Stokstad,A. Stoeßl,N. Strotjohann,Thomas Stuttard,G. Sullivan,M. Sutherland,I. Taboada,J. Tatar,F. Tenholt,Samvel Ter-Antonyan,Andrii Terliuk,Serap Tilav,Pat Toale,M. Tobin,Christoph Toennis,S. Toscano,Delia Tosi,Maria Tselengidou,C. Tung,A. Turcati,Colin Turley,Bunheng Ty,L. Unger,Marcel Usner,Ward Driessche,D. Eijk,S. Vallecorsa,J. Vandenbroucke,Sander Vanheule,Jakob Santen,E. Vogel,M. Vraeghe,C. Walck,A. Wallace,M. Wallraff,F. Wandler,N. Wandkowsky,Aatif Waza,Chris Weaver,Matthew Weiss,Chris Wendt,Johannes Werthebach,S. Westerhoff,B. Whelan,N. Whitehorn,Klaus Wiebe,C. Wiebusch,Logan Wille,Dawn Williams,L. Wills,Martin Wolf,Joshua Wood,T. Wood,K. Woschnagg,D. Xu,Xianwu Xu,Yiqian Xu,Juan Yáñez,G. Yodh,S. Yoshida,Tianlu Yuan,S. Abdollahi,Marco Ajello,R. Angioni,L. Baldini,J. Ballet,G. Barbiellini,Denis Bastieri,K. Bechtol,R. Bellazzini,B. Berenji,E. Bissaldi,R. Blandford,R. Bonino,E. Bottacini,J. Bregeon,P. Bruel,R. Buehler,T. Burnett,Eric Burns,S. Buson,R. Cameron,R. Caputo,P. Caraveo,E. Cavazzuti,E. Charles,Sina Chen,C. Cheung,J. Chiang,Graziano Chiaro,S. Ciprini,J. Cohen-Tanugi,D. Costantin,S. Cutini,F. D’Ammando,F. Palma,S. Digel,Niccolò Lalla,Mattia Mauro,L. Venere,A. Domínguez,C. Favuzzi,Y. Fukazawa,S. Funk,P. Fusco,F. Gargano,D. Gasparrini,N. Giglietto,M. Giomi,P. Giommi,F. Giordano,M. Giroletti,T. Glanzman,David Green,I. Grenier,Marie-Hélène Grondin,S. Guiriec,A. Harding,M. Hayashida,Liz Hays,John Hewitt,D. Horan,G. Jóhannesson,M. Kadler,S. Kensei,D. Kocevski,F. Krauß,M. Kreter,M. Kuss,G. Mura,S. Larsson,L. Latronico,Marianne Lemoine-Goumard,Jian Li,Francesco Longo,F. Loparco,Michael Lovellette,P. Lubrano,Jeffrey Magill,S. Maldera,D. 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