Optical Observations Reveal Strong Evidence for High-energy Neutrino Progenitor
V. M. Lipunov, В. Г. Корнилов, K. Zhirkov, E. Gorbovskoy, Н. Буднев, D. A. H. Buckley, R. Rébolo, M. Serra‐Ricart, R. Podestá, N. Tyurina, О. Гресс, Y. Sergienko, V. Yurkov, A. Gabovich, P. Balanutsa, I. Gorbunov, D. Vlasenko, F. Balakin, V. Topolev, A. Pozdnyakov, A. Kuznetsov, V. Vladimirov, A. Chasovnikov, D. Kuvshinov, V. Grinshpun, E. Minkina, V. B. Petkov, С. И. Свертилов, C. López, F. Podestá, H. Levato⋆, A. Tlatov, B. van Soelen, S. Razzaque, M. Böttcher
Abstract
Abstract We present the earliest astronomical observation of a high-energy neutrino error box of which the variability was discovered after high-energy-neutrino detection. The one robotic telescope of the MASTER global international networks automatically imaged the error box of the very high-energy-neutrino event IceCube-170922A. Observations were carried out in minutes after the IceCube-170922A neutrino event was detected by the IceCube observatory at the South Pole. MASTER found the blazar TXS 0506+056 to be in the off-state after one minute and then switched to the on-state no later than two hours after the event. The effect is observed at a 50 σ significance level. We also present own a unique 16 yr light curve of blazar TXS 0506+056 (518 data set).