3C 66A (z = 0.44)
Fermi LAT Gamma-ray flux (in units of 1.E-7 phot/cm^2/s; magenta symbols - upper limits), X-ray flux (Swift XRT) in units of 1.E-12 erg/cm^2/s, and optical light curve and degree and position angle of optical polarization obtained at the Perkins telescope (PTO, Flagstaff, AZ) vs. time.