@article{01JXWB1SMNJBD672ZDVK7D9AA0,
  abstract     = {{While the sources of the diffuse astrophysical neutrino flux detected by the IceCube Neutrino Observatory are still largely unknown, one of the promising methods to improve our understanding of them is investigating the potential temporal and spatial correlations between neutrino alerts and the electromagnetic radiation from blazars. We report on the multiwavelength target-of-opportunity observations of the blazar B3 2247+381, taken in response to an IceCube multiplet alert for a cluster of muon neutrino events compatible with the source location between 2022 May 20 and 2022 November 10. B3 2247+381 was not detected with VERITAS during this time period. The source was found to be in a low-flux state in the optical, ultraviolet, and gamma-ray bands for the time interval corresponding to the neutrino event, but was detected in the hard X-ray band with NuSTAR during this period. We find the multiwavelength spectral energy distribution is described well using a simple one-zone leptonic synchrotron self-Compton radiation model. Moreover, assuming the neutrinos originate from hadronic processes within the jet, the neutrino flux would be accompanied by a photon flux from the cascade emission, and the integrated photon flux required in such a case would significantly exceed the total multiwavelength fluxes and the VERITAS upper limits presented here. The lack of flaring activity observed with VERITAS, combined with the low multiwavelength flux levels, as well as the significance of the neutrino excess being at a 3 sigma level (uncorrected for trials), makes B3 2247+381 an unlikely source of the IceCube multiplet. We conclude that the neutrino excess is likely a background fluctuation.}},
  articleno    = {{80}},
  author       = {{Acharyya, A. and Adams, C. B. and Bangale, P. and Bartkoske, J. T. and Benbow, W. and Buckley, J. H. and Christiansen, J. L. and Duerr, A. and Errando, M. and Godoy, M. Escobar and Falcone, A. and Feng, Q. and Foote, J. and Fortson, L. and Furniss, A. and Gallagher, G. and Hanlon, W. and Hanna, D. and Hervet, O. and Hinrichs, C. E. and Hoang, J. and Holder, J. and Humensky, T. B. and Jin, W. and Johnson, M. N. and Kaaret, P. and Kertzman, M. and Kherlakian, M. and Kieda, D. and Kleiner, T. K. and Korzoun, N. and Krennrich, F. and Kumar, S. and Lang, M. J. and Lundy, M. and McGrath, C. E. and Meyer, E. and Millard, M. J. and Millis, J. and Mooney, C. L. and Moriarty, P. and Mukherjee, R. and Ning, W. and O'Brien, S. and Ong, R. A. and Pohl, M. and Pueschel, E. and Quinn, J. and Rabinowitz, P. L. and Ragan, K. and Reynolds, P. T. and Ribeiro, D. and Roache, E. and Ryan, J. L. and Sadeh, I. and Sadun, A. C. and Saha, L. and Santander, M. and Sembroski, G. H. and Shang, R. and Splettstoesser, M. and Tak, D. and Talluri, A. K. and Tucci, J. V. and Valverde, J. and Williams, D. A. and Wong, S. L. and Woo, J. and Abbasi, R. and Ackermann, M. and Adams, J. and Agarwalla, S. K. and Aguilar, J. A. and Ahlers, M. and Alameddine, J. M. and Amin, N. M. and Andeen, K. and Arguelles, C. and Ashida, Y. and Athanasiadou, S. and Axani, S. N. and Babu, R. and Bai, X. and Balagopal, A. and Baricevic, M. and Barwick, S. W. and Bash, S. and Basu, V. and Bay, R. and Beatty, J. J. and Tjus, J. Becker and Beise, J. and Bellenghi, C. and BenZvi, S. and Berley, D. and Bernardini, E. and Besson, D. Z. and Blaufuss, E. and Bloom, L. and Blot, S. and Bontempo, F. and Motzkin, J. Y. Book and Meneguolo, C. Boscolo and Boeser, S. and Botner, O. and Boettcher, J. and Braun, J. and Brinson, B. and Brisson-Tsavoussis, Z. and Brostean-Kaiser, J. and Brusa, L. and Burley, R. T. and Butterfield, D. and Campana, M. A. and Caracas, I. and Carloni, K. and Carpio, J. and Chattopadhyay, S. and Chau, N. and Chen, Z. and Chirkin, D. and Choi, S. and Clark, B. A. and Coleman, A. and Coleman, P. and Collin, G. H. and Connolly, A. and Conrad, J. M. and Corley, R. and Cowen, D. F. and De Clercq, C. and DeLaunay, J. J. and Delgado, D. and Deng, S. and Desai, A. and Desiati, P. and de Vries, K. D. and de Wasseige, G. and DeYoung, T. and Diaz, A. and Diaz-Velez, J. C. and Dierichs, P. and Dittmer, M. and Domi, A. and Draper, L. and Dujmovic, H. and Durnford, D. and Dutta, K. and DuVernois, M. A. and Ehrhardt, T. and Eidenschink, L. and Eimer, A. and Eller, P. and Ellinger, E. and El Mentawi, S. and Elsaesser, D. and Engel, R. and Erpenbeck, H. and Evans, J. and Evenson, P. A. and Fan, K. L. and Fang, K. and Farrag, K. and Fazely, A. R. and Fedynitch, A. and Feigl, N. and Fiedlschuster, S. and Finley, C. and Fischer, L. and Fox, D. and Franckowiak, A. and Fukami, S. and Fuerst, P. and Gallagher, J. and Ganster, E. and Garcia, A. and Garcia, M. and Garg, G. and Genton, E. and Gerhardt, L. and Ghadimi, A. and Girard-Carillo, C. and Glaser, C. and Gluesenkamp, T. and Gonzalez, J. G. and Goswami, S. and Granados, A. and Grant, D. and Gray, S. J. and Griffin, S. and Griswold, S. and Groth, K. M. and Guevel, D. and Guenther, C. and Gutjahr, P. and Ha, C. and Haack, C. and Hallgren, A. and Halve, L. and Halzen, F. and Hamacher, L. and Hamdaoui, H. and Minh, M. Ha and Handt, M. and Hanson, K. and Hardin, J. and Harnisch, A. A. and Hatch, P. and Haungs, A. and Haeussler, J. and Helbing, K. and Hellrung, J. and Hermannsgabner, J. and Heuermann, L. and Heyer, N. and Hickford, S. and Hidvegi, A. and Hill, C. and Hill, G. C. and Hmaid, R. and Hoffman, K. D. and Hori, S. and Hoshina, K. and Hostert, M. and Hou, W. and Huber, T. and Hultqvist, K. and Huennefeld, M. and Hussain, R. and Hymon, K. and Ishihara, A. and Iwakiri, W. and Jacquart, M. and Jain, S. and Janik, O. and Jansson, M. and Jeong, M. and Jin, M. and Jones, B. J. P. and Kamp, N. and Kang, D. and Kang, W. and Kang, X. and Kappes, A. and Kappesser, D. and Kardum, L. and Karg, T. and Karl, M. and Karle, A. and Katil, A. and Katz, U. and Kauer, M. and Kelley, J. L. and Khanal, M. and Zathul, A. Khatee and Kheirandish, A. and Kiryluk, J. and Klein, S. R. and Kobayashi, Y. and Kochocki, A. and Koirala, R. and Kolanoski, H. and Kontrimas, T. and Koepke, L. and Kopper, C. and Koskinen, D. J. and Koundal, P. and Kowalski, M. and Kozynets, T. and Krishnamoorthi, J. and Kruiswijk, K. and Krupczak, E. and Kumar, A. and Kun, E. and Kurahashi, N. and Lad, N. and Gualda, C. Lagunas and Lamoureux, M. and Larson, M. J. and Lauber, F. and Lazar, J. P. and Lee, J. W. and DeHolton, K. Leonard and Leszczynska, A. and Liao, J. and Lincetto, M. and Liu, Y. T. and Liubarska, M. and Love, C. and Lu, L. and Lucarelli, F. and Luszczak, W. and Lyu, Y. and Madsen, J. and Magnus, E. and Mahn, K. B. M. and Makino, Y. and Manao, E. and Mancina, S. and Mand, A. and Sainte, W. Marie and Maris, I. C. and Marka, S. and Marka, Z. and Marsee, M. and Martinez-Soler, I. and Maruyama, R. and Mayhew, F. and McNally, F. and Mead, J. V. and Meagher, K. and Mechbal, S. and Medina, A. and Meier, M. and Merckx, Y. and Merten, L. and Mitchell, J. and Montaruli, T. and Moore, R. W. and Morii, Y. and Morse, R. and Moulai, M. and Mukherjee, T. and Naab, R. and Nakos, M. and Naumann, U. and Necker, J. and Negi, A. and Neste, L. and Neumann, M. and Niederhausen, H. and Nisa, M. U. and Noda, K. and Noell, A. and Novikov, A. and Pollmann, A. Obertacke and O'Dell, V. and Olivas, A. and Orsoe, R. and Osborn, J. and O'Sullivan, E. and Palusova, V. and Pandya, H. and Park, N. and Parker, G. K. and Parrish, V. and Paudel, E. N. and Paul, L. and de los Heros, C. Perez and Pernice, T. and Peterson, J. and Pizzuto, A. and Plum, M. and Ponten, A. and Popovych, Y. and Rodriguez, M. Prado and Pries, B. and Procter-Murphy, R. and Przybylski, G. T. and Pyras, L. and Raab, C. and Rack-Helleis, J. and Rad, N. and Ravn, M. and Rawlins, K. and Rechav, Z. and Rehman, A. and Reichherzer, P. and Resconi, E. and Reusch, S. and Rhode, W. and Riedel, B. and Rifaie, A. and Roberts, E. J. and Robertson, S. and Rodan, S. and Roellinghoff, G. and Rongen, M. and Rosted, A. and Rott, C. and Ruhe, T. and Ruohan, L. and Ryckbosch, Dirk and Safa, I. and Saffer, J. and Salazar-Gallegos, D. and Sampathkumar, P. and Sandrock, A. and Sarkar, S. and Savelberg, J. and Savina, P. and Schaile, P. and Schaufel, M. and Schieler, H. and Schindler, S. and Schlickmann, L. and Schlueter, B. and Schluter, F. and Schmeisser, N. and Schmidt, T. and Schneider, J. and Schroeder, F. G. and Schumacher, L. and Schwirn, S. and Sclafani, S. and Seckel, D. and Seen, L. and Seikh, M. and Seo, M. and Seunarine, S. and Myhr, P. Sevle and Shah, R. and Shefali, S. and Shimizu, N. and Silva, M. and Skrzypek, B. and Smithers, B. and Snihur, R. and Soedingrekso, J. and Sogaard, A. and Soldin, D. and Soldin, P. and Sommani, G. and Spannfellner, C. and Spiczak, G. M. and Spiering, C. and Stachurska, Juliana and Stamatikos, M. and Stanev, T. and Stezelberger, T. and Stuerwald, T. and Stuttard, T. and Sullivan, G. W. and Taboada, I. and Ter-Antonyan, S. and Terliuk, A. and Thiesmeyer, M. and Thompson, W. G. and Thwaites, J. and Tilav, S. and Tollefson, K. and Tonnis, C. and Toscano, S. and Tosi, D. and Trettin, A. and Turcotte, R. and Elorrieta, M. A. Unland and Upadhyay, A. K. and Upshaw, K. and Vaidyanathan, A. and Valtonen-Mattila, N. and Vandenbroucke, J. and van Eijndhoven, N. and Vannerom, D. and van Santen, J. and Vara, J. and Varsi, F. and Veitch-Michaelis, J. and Venugopal, M. and Vereecken, M. and Carrasco, S. Vergara and Verpoest, S. and Veske, D. and Vijai, A. and Walck, C. and Wang, A. and Weaver, C. and Weigel, P. and Weindl, A. and Weldert, J. and Wen, A. Y. and Wendt, C. and Werthebach, J. and Weyrauch, M. and Whitehorn, N. and Wiebusch, C. H. and Williams, D. R. and Witthaus, L. and Wolf, M. and Wrede, G. and Xu, X. W. and Yanez, J. P. and Yildizci, E. and Yoshida, S. and Young, R. and Yu, S. and Yuan, T. and Zegarelli, A. and Zhang, S. and Zhang, Z. and Zhelnin, P. and Zilberman, P. and Zimmerman, M. and Drake, P. and Spira-Savett, E. and Lusen, P. and Mori, K. and on behalf of the IceCube Collaboration, [ missing ]}},
  issn         = {{0004-637X}},
  journal      = {{ASTROPHYSICAL JOURNAL}},
  keywords     = {{LARGE-AREA TELESCOPE,HIGH-ENERGY NEUTRINO,GAMMA-RAY EMISSION,PKS 0735+178,TXS 0506+056,COINCIDENT,RADIATION,RADIO,MULTIMESSENGER,VARIABILITY}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{18}},
  title        = {{VERITAS and multiwavelength observations of the blazar B3 2247+381 in response to an IceCube neutrino alert}},
  url          = {{http://doi.org/10.3847/1538-4357/adb30c}},
  volume       = {{982}},
  year         = {{2025}},
}

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