Infrared polarimetry and photometry have been obtained for a sample of 18 BL Lac objects. Large and variable degrees of polarization are a common property of the sample. Two BL Lac objects show wavelength dependent polarization and two objects show evidence for position angle rotations over a five-day period. The BL Lac objects cover an enormous range of infrared luminosity; the three most luminous having LIR > 1046ergs s-1 and the other end of the range having infrared luminosities similar to normal elliptical galaxies.
Second Asian-Pacific Regional Meeting on Astronomy
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