BZQJ 1955+5131. Top left panel: TS map considering only E > 0.5 GeV photons, during the high-state period between 2014 and 2015. Top right panel: SED for 5BZQJ 1955+5131 at z = 1.21, with the newγ-ray spectrum in the 0.3–500 GeV band. As example, in the 10²² –10²⁶ Hz band (0.1–500 GeV), we show the Fermi-LAT sensitivity limit when integrating over four year of observations. Bottom panel: the γ-ray light curve for 5BZQJ 1955+5131 along 7.5 yr of observations and with time bin of 30 days.