NEW SUPERLUMINAL QUASAR-1633+382 AND THE BLAZAR-GAMMA-RAY CONNECTION

We report detection of superluminal motion in the core of 4C 38.41, associated with the z = 1.814 quasar 1633+382. The dominant nucleus in the similar to 30 kpc triple morphology of the radio source displays a core-jet structure on the milliarcsecond scale, and a jet component is found moving outward at 6.1 h(-1)c(H-0 = 100 h km s(-1) Mpc(-1), q(0) = 0.5). Quasar 1633+382 is a highly variable object, in both the radio and the optical wavebands, and in addition an extremely luminous gamma-ray emitter. It is the ninth gamma-ray blazar displaying superluminal motion. We point out that all gamma-ray active galactic nuclei (AGNs) which have been observed with VLBI sufficiently well have been found to show superluminal expansion. This provides strong support for the commonly accepted hypothesis that AGN gamma-ray emission is produced in a beamed relativistic jet.