Drake, PabloAdams, ColinHahn, C.Meyer, Eileen T.VERITAS Collaborationet al2023-10-172023-10-172023-08-08Drake, Pablo, and Colin Adams. “VERITAS Follow-up Observation of the BL Lac Blazar B2 1811+31 2020 Flare.” In Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023), 444:701. SISSA Medialab, 2023. https://doi.org/10.22323/1.444.0701.https://doi.org/10.22323/1.444.0701http://hdl.handle.net/11603/30213Full Author List VERITAS Collaboration :- A. Acharyya, C. B. Adams, A. Archer, P. Bangale, J. T. Bartkoske, P. Batista, W. Benbow, J. L. Christiansen, A. J. Chromey, A. Duerr, M. Errando, Q. Feng, G. M. Foote, L. Fortson, A. Furniss, C. Hahn, W. Hanlon, O. Hervet, C. E. Hinrichs, J. Hoang, J. Holder, Z. Hughes, T. B. Humensky, W. Jin, M. N. Johnson, M. Kertzman, M. Kherlakian, D. Kieda, T. K. Kleiner, N. Korzoun, S. Kumar, M. J. Lang, M. Lundy, G. Maier, C. E McGrath, E. T. Meyer, M. J. Millard, C. L. Mooney, P. Moriarty, R. Mukherjee, S. O’Brien, R. A. Ong, N. Park, C. Poggemann, M. Pohl, E. Pueschel, J. Quinn, P. L. Rabinowitz, K. Ragan, P. T. Reynolds, D. Ribeiro, E. Roache, J. L. Ryan, I. Sadeh, A. C. Sadun, L. Saha, M. Santander, G. H. Sembroski, R. Shang, M. Splettstoesser, A. K. Talluri, J. V. Tucci, V. V. Vassiliev, A. Weinstein, D. A. Williams, S. L. Wong, and J. Woo38th International Cosmic Ray Conference (ICRC2023), 26 July - 3 August, 2023, Nagoya, JapanVERITAS is an imaging atmospheric Cherenkov telescope (IACT) array most sensitive to gamma rays in the very-high-energy (VHE) energy band (85 GeV - 50 TeV). As a part of its active galactic nuclei (AGN) program, VERITAS focuses on the identification and follow-up of AGN flares reported by other multiwavelength observatories. Between October 15th and October 19th, 2020, VERITAS followed up on the Fermi-LAT and MAGIC detections of a flare of the intermediate-frequency-peaked BL Lacertae (IBL) object, B2 1811+31, located at a redshift of z=0.117. In this work, we present preliminary scientific results from the analysis of B2 1811+31’s 2020 flare, including the corresponding Fermi-LAT light curve and VERITAS detection analysis.8 pagesen-USThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.CC BY-NC-ND 4.0 DEED Attribution-NonCommercial-NoDerivs 4.0 Internationalhttps://creativecommons.org/licenses/by-nc-nd/4.0/Text