SED for BZQJ 1224+2122, with blue bump template assuming z = 0.434. This source has the largest γ-ray variability index, and we fit the IC component during various flaring states. In the high-energy band, the blue line refers to the 1FGL detection (integrating 2008–2009 data), the red line refers to the 3FGL detection (2008–2012 data), and the dark-green line represents a short and relatively bright flare reported by the MAGIC team Aleksić et al. (2011) with reported variability within few hours.