Simultaneous radio spectrum of MG2 J144640+3110 after its gamma-ray activity

Mikhailov A. G., Kharinov M. A., Sotnikova Yu. V.

We report the historical high flux density level for the blazar of unknown type MG2 J144640+3110 at 5-22 GHz. This blazar showed an increasing gamma-ray activity at the beginning of February 2023 (ATel#15888). Daily observations were carried out with the radio telescope RATAN-600 during February 19 - March 01 at 1.2, 2.3, 4.7, 8.2, 11.2 and 22.3 GHz. The averaged flux densities are 0.163 (0.01) Jy at 4.7 GHz , 0.225 (0.02) Jy at 8.2 GHz, 0.236 (0.02) Jy at 11.2 GHz, 0.262 (0.03) Jy at 22.3 GHz. The upper limits are 0.200 Jy at 1.2 GHz and 0.105 Jy at 2.3 GHz.