Atreya Acharyya VERITAS Collaboration, Colin B. Adams VERITAS Collaboration, Priyadarshini Bangale VERITAS Collaboration, J. T. Bartkoske VERITAS Collaboration, Wystan Benbow VERITAS Collaboration, James H. Buckley VERITAS Collaboration, Yu Chen VERITAS Collaboration, Jodi Christiansen VERITAS Collaboration, Alisha Chromey VERITAS Collaboration, Anne Duerr VERITAS Collaboration, Manel Errando VERITAS Collaboration, Miguel E. Godoy VERITAS Collaboration, Abe Falcone VERITAS Collaboration, Qi Feng VERITAS Collaboration, Juniper Foote VERITAS Collaboration, Lucy Fortson VERITAS Collaboration, Amy Furniss VERITAS Collaboration, William Hanlon VERITAS Collaboration, David Hanna VERITAS Collaboration, Olivier Hervet VERITAS Collaboration, Claire E. Hinrichs VERITAS Collaboration, Jamie Holder VERITAS Collaboration, Thomas B. Humensky VERITAS Collaboration, Weidong Jin VERITAS Collaboration, Madalyn N. Johnson VERITAS Collaboration, Philip Kaaret VERITAS Collaboration, Mary P. 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Rabinowitz VERITAS Collaboration, Ken Ragan VERITAS Collaboration, Paul Reynolds VERITAS Collaboration, Deivid Ribeiro VERITAS Collaboration, Emmet Thomas Roache VERITAS Collaboration, Jamie L. Ryan VERITAS Collaboration, Iftach Sadeh VERITAS Collaboration, Alberto Sadun VERITAS Collaboration, Lab Saha VERITAS Collaboration, Marcos Santander VERITAS Collaboration, Glenn H. Sembroski VERITAS Collaboration, Ruo-Yu Shang VERITAS Collaboration, Megan Splettstoesser VERITAS Collaboration, Donggeun Tak VERITAS Collaboration, Anjana K. Talluri VERITAS Collaboration, James V. Tucci VERITAS Collaboration, Janeth Valverde VERITAS Collaboration, David A. Williams VERITAS Collaboration, Sam L. Wong VERITAS Collaboration, Jooyun Woo VERITAS Collaboration, R. Abbasi IceCube Collaboration, M. Ackermann IceCube Collaboration, J. Adams IceCube Collaboration, S. K. Agarwalla IceCube Collaboration, J. A. Aguilar IceCube Collaboration, M. Ahlers IceCube Collaboration, J. M. Alameddine IceCube Collaboration, N. M. Amin IceCube Collaboration, K. Andeen IceCube Collaboration, C. Argüelles IceCube Collaboration, Y. Ashida IceCube Collaboration, S. Athanasiadou IceCube Collaboration, S. N. Axani IceCube Collaboration, R. Babu IceCube Collaboration, X. Bai IceCube Collaboration, A. Balagopal V. IceCube Collaboration, M. Baricevic IceCube Collaboration, S. W. Barwick IceCube Collaboration, S. Bash IceCube Collaboration, V. Basu IceCube Collaboration, R. Bay IceCube Collaboration, J. J. Beatty IceCube Collaboration, J. Becker Tjus IceCube Collaboration, J. Beise IceCube Collaboration, C. Bellenghi IceCube Collaboration, S. BenZvi IceCube Collaboration, D. Berley IceCube Collaboration, E. Bernardini IceCube Collaboration, D. Z. Besson IceCube Collaboration, E. Blaufuss IceCube Collaboration, L. Bloom IceCube Collaboration, S. Blot IceCube Collaboration, F. Bontempo IceCube Collaboration, J. Y. Book Motzkin IceCube Collaboration, C. Boscolo Meneguolo IceCube Collaboration, S. Böser IceCube Collaboration, O. Botner IceCube Collaboration, J. Böttcher IceCube Collaboration, J. Braun IceCube Collaboration, B. Brinson IceCube Collaboration, Z. Brisson-Tsavoussis IceCube Collaboration, J. Brostean-Kaiser IceCube Collaboration, L. Brusa IceCube Collaboration, R. T. Burley IceCube Collaboration, D. Butterfield IceCube Collaboration, M. A. Campana IceCube Collaboration, I. Caracas IceCube Collaboration, K. Carloni IceCube Collaboration, J. Carpio IceCube Collaboration, S. Chattopadhyay IceCube Collaboration, N. Chau IceCube Collaboration, Z. Chen IceCube Collaboration, D. Chirkin IceCube Collaboration, S. Choi IceCube Collaboration, B. A. Clark IceCube Collaboration, A. Coleman IceCube Collaboration, P. Coleman IceCube Collaboration, G. H. Collin IceCube Collaboration, A. Connolly IceCube Collaboration, J. M. Conrad IceCube Collaboration, R. Corley IceCube Collaboration, D. F. Cowen IceCube Collaboration, C. De Clercq IceCube Collaboration, J. J. DeLaunay IceCube Collaboration, D. Delgado IceCube Collaboration, S. Deng IceCube Collaboration, A. Desai IceCube Collaboration, P. Desiati IceCube Collaboration, K. D. de Vries IceCube Collaboration, G. de Wasseige IceCube Collaboration, T. DeYoung IceCube Collaboration, A. Diaz IceCube Collaboration, J. C. Díaz-Vélez IceCube Collaboration, P. Dierichs IceCube Collaboration, M. Dittmer IceCube Collaboration, A. Domi IceCube Collaboration, L. Draper IceCube Collaboration, H. Dujmovic IceCube Collaboration, D. Durnford IceCube Collaboration, K. Dutta IceCube Collaboration, M. A. DuVernois IceCube Collaboration, T. Ehrhardt IceCube Collaboration, L. Eidenschink IceCube Collaboration, A. Eimer IceCube Collaboration, P. Eller IceCube Collaboration, E. Ellinger IceCube Collaboration, S. El Mentawi IceCube Collaboration, D. Elsässer IceCube Collaboration, R. Engel IceCube Collaboration, H. Erpenbeck IceCube Collaboration, W. Esmail IceCube Collaboration, J. Evans IceCube Collaboration, P. A. Evenson IceCube Collaboration, K. L. Fan IceCube Collaboration, K. Fang IceCube Collaboration, K. Farrag IceCube Collaboration, A. R. Fazely IceCube Collaboration, A. Fedynitch IceCube Collaboration, N. Feigl IceCube Collaboration, S. Fiedlschuster IceCube Collaboration, C. Finley IceCube Collaboration, L. Fischer IceCube Collaboration, D. Fox IceCube Collaboration, A. Franckowiak IceCube Collaboration, S. Fukami IceCube Collaboration, P. Fürst IceCube Collaboration, J. Gallagher IceCube Collaboration, E. Ganster IceCube Collaboration, A. Garcia IceCube Collaboration, M. Garcia IceCube Collaboration, G. Garg IceCube Collaboration, E. Genton IceCube Collaboration, L. Gerhardt IceCube Collaboration, A. Ghadimi IceCube Collaboration, C. Girard-Carillo IceCube Collaboration, C. Glaser IceCube Collaboration, T. Glüsenkamp IceCube Collaboration, J. G. Gonzalez IceCube Collaboration, S. Goswami IceCube Collaboration, A. Granados IceCube Collaboration, D. Grant IceCube Collaboration, S. J. Gray IceCube Collaboration, S. Griffin IceCube Collaboration, S. Griswold IceCube Collaboration, K. M. Groth IceCube Collaboration, D. Guevel IceCube Collaboration, C. Günther IceCube Collaboration, P. Gutjahr IceCube Collaboration, C. Ha IceCube Collaboration, C. Haack IceCube Collaboration, A. Hallgren IceCube Collaboration, L. Halve IceCube Collaboration, F. Halzen IceCube Collaboration, L. Hamacher IceCube Collaboration, H. Hamdaoui IceCube Collaboration, M. Ha Minh IceCube Collaboration, M. Handt IceCube Collaboration, K. Hanson IceCube Collaboration, J. Hardin IceCube Collaboration, A. A. Harnisch IceCube Collaboration, P. Hatch IceCube Collaboration, A. Haungs IceCube Collaboration, J. Häußler IceCube Collaboration, K. Helbing IceCube Collaboration, J. Hellrung IceCube Collaboration, J. Hermannsgabner IceCube Collaboration, L. Heuermann IceCube Collaboration, N. Heyer IceCube Collaboration, S. Hickford IceCube Collaboration, A. Hidvegi IceCube Collaboration, C. Hill IceCube Collaboration, G. C. Hill IceCube Collaboration, R. Hmaid IceCube Collaboration, K. D. Hoffman IceCube Collaboration, S. Hori IceCube Collaboration, K. Hoshina IceCube Collaboration, M. Hostert IceCube Collaboration, W. Hou IceCube Collaboration, T. Huber IceCube Collaboration, K. Hultqvist IceCube Collaboration, M. Hünnefeld IceCube Collaboration, R. Hussain IceCube Collaboration, K. Hymon IceCube Collaboration, A. Ishihara IceCube Collaboration, W. Iwakiri IceCube Collaboration, M. Jacquart IceCube Collaboration, S. Jain IceCube Collaboration, O. Janik IceCube Collaboration, M. Jansson IceCube Collaboration, M. Jeong IceCube Collaboration, M. Jin IceCube Collaboration, B. J. P. Jones IceCube Collaboration, N. Kamp IceCube Collaboration, D. Kang IceCube Collaboration, W. Kang IceCube Collaboration, X. Kang IceCube Collaboration, A. Kappes IceCube Collaboration, D. Kappesser IceCube Collaboration, L. Kardum IceCube Collaboration, T. Karg IceCube Collaboration, M. Karl IceCube Collaboration, A. Karle IceCube Collaboration, A. Katil IceCube Collaboration, U. Katz IceCube Collaboration, M. Kauer IceCube Collaboration, J. L. Kelley IceCube Collaboration, M. Khanal IceCube Collaboration, A. Khatee Zathul IceCube Collaboration, A. Kheirandish IceCube Collaboration, J. Kiryluk IceCube Collaboration, S. R. Klein IceCube Collaboration, Y. Kobayashi IceCube Collaboration, A. Kochocki IceCube Collaboration, R. Koirala IceCube Collaboration, H. Kolanoski IceCube Collaboration, T. Kontrimas IceCube Collaboration, L. Köpke IceCube Collaboration, C. Kopper IceCube Collaboration, D. J. Koskinen IceCube Collaboration, P. Koundal IceCube Collaboration, M. Kowalski IceCube Collaboration, T. Kozynets IceCube Collaboration, N. Krieger IceCube Collaboration, J. Krishnamoorthi IceCube Collaboration, T. Krishnan IceCube Collaboration, K. Kruiswijk IceCube Collaboration, E. 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Smithers IceCube Collaboration, R. Snihur IceCube Collaboration, J. Soedingrekso IceCube Collaboration, A. Søgaard IceCube Collaboration, D. Soldin IceCube Collaboration, P. Soldin IceCube Collaboration, G. Sommani IceCube Collaboration, C. Spannfellner IceCube Collaboration, G. M. Spiczak IceCube Collaboration, C. Spiering IceCube Collaboration, J. Stachurska IceCube Collaboration, M. Stamatikos IceCube Collaboration, T. Stanev IceCube Collaboration, T. Stezelberger IceCube Collaboration, T. Stürwald IceCube Collaboration, T. Stuttard IceCube Collaboration, G. W. Sullivan IceCube Collaboration, I. Taboada IceCube Collaboration, S. Ter-Antonyan IceCube Collaboration, A. Terliuk IceCube Collaboration, M. Thiesmeyer IceCube Collaboration, W. G. Thompson IceCube Collaboration, J. Thwaites IceCube Collaboration, S. Tilav IceCube Collaboration, K. Tollefson IceCube Collaboration, C. Tönnis IceCube Collaboration, S. Toscano IceCube Collaboration, D. Tosi IceCube Collaboration, A. Trettin IceCube Collaboration, M. A. Unland Elorrieta IceCube Collaboration, A. K. Upadhyay IceCube Collaboration, K. Upshaw IceCube Collaboration, A. Vaidyanathan IceCube Collaboration, N. Valtonen-Mattila IceCube Collaboration, J. Vandenbroucke IceCube Collaboration, N. van Eijndhoven IceCube Collaboration, D. Vannerom IceCube Collaboration, J. van Santen IceCube Collaboration, J. Vara IceCube Collaboration, F. Varsi IceCube Collaboration, J. Veitch-Michaelis IceCube Collaboration, M. Venugopal IceCube Collaboration, M. Vereecken IceCube Collaboration, S. Vergara Carrasco IceCube Collaboration, S. Verpoest IceCube Collaboration, D. Veske IceCube Collaboration, A. Vijai IceCube Collaboration, C. Walck IceCube Collaboration, A. Wang IceCube Collaboration, C. Weaver IceCube Collaboration, P. Weigel IceCube Collaboration, A. Weindl IceCube Collaboration, J. Weldert IceCube Collaboration, A. Y. Wen IceCube Collaboration, C. Wendt IceCube Collaboration, J. Werthebach IceCube Collaboration, M. Weyrauch IceCube Collaboration, N. Whitehorn IceCube Collaboration, C. H. Wiebusch IceCube Collaboration, D. R. Williams IceCube Collaboration, L. Witthaus IceCube Collaboration, M. Wolf IceCube Collaboration, G. Wrede IceCube Collaboration, X. W. Xu IceCube Collaboration, J. P. Yanez IceCube Collaboration, E. Yildizci IceCube Collaboration, S. Yoshida IceCube Collaboration, R. Young IceCube Collaboration, F. Yu IceCube Collaboration, S. Yu IceCube Collaboration, T. Yuan IceCube Collaboration, A. Zegarelli IceCube Collaboration, S. Zhang IceCube Collaboration, Z. Zhang IceCube Collaboration, P. Zhelnin IceCube Collaboration, P. Zilberman IceCube Collaboration, M. Zimmerman IceCube Collaboration, Pablo Drake, Elizabeth Spira-Savett, Piatra Lusen, Kaya Mori

While the sources of the diffuse astrophysical neutrino flux detected by the IceCube Neutrino Observatory are still largely unknown, one of the promising methods used towards understanding this 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 May 20, 2022 and November 10, 2022. 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 well described 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, and given the significance of the neutrino excess is at 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.