Radio measurements of PKS 1614+051

The radio data are represented by the almost instantaneous 1-22GHz measurements from the SAO RAS RATAN-600 radio telescope, the 5 and 8GHz data from the IAA RAS RT-32 telescopes, and the 37GHz data from the RT-22 telescope of CrAO RAS. The optical measurements in the R band were collected with the SAO RAS 1-m Zeiss-1000 and 0.5-m AS-500/2 telescopes, and the ZTF archive data.

We have found low overall variability indices (0.1-0.2) and a median spectral peak at 4.6GHz, which is stable during the long-term period of monitoring. An analysis of the radio light curves reveals significant time delays (0.6 to 6.4 yrs) between the radio frequencies along with variability timescales ranging from 0.2 to 1.8 yrs in the source's rest frame, which is similar to the blazars at lower redshifts. Spectral modeling suggests the presence of both synchrotron self-absorption (SSA) and free-free absorption (FFA) processes.