In this paper, the correlation between the gamma-ray and the radio ban
ds is investigated. The results show that there is a closer correlatio
n between the gamma-ray emission and the high frequency (1.3 mm, 230 G
Hz) radio emission for maximum data than between the gamma-ray and the
lower frequency (5GHz) radio emissions, which means that the gamma-ra
y is associated with the radio emission from the jet.