A Slower Superluminal Velocity for the Quasar 1156+295

Authors

B. Glenn Piner, Whittier CollegeFollow
Kerry A. Kingham

Publication Title

The Astrophysical Journal

Volume

485

Publication Date

1997

Document Type

Article

First and Last Page

L61

Abstract

As part of an ongoing effort to observe high-energy γ-ray blazars with VLBI, we have produced 8 and 2 GHz VLBI images, at 10 epochs spanning the years 1988 to 1996, of the quasar 1156+295. The VLBI data have been taken from the Washington VLBI correlator's geodetic database. We have detected four components and have measured their apparent speeds to be 8.8 +/- 2.3, 5.3 +/- 1.1, 5.5 +/- 0.9, and 3.5 +/- 1.2 h-1c from the outermost component inward. (H₀ = 100 h km s^-1 Mpc^-1, q₀ = 0.5 throughout this Letter). These velocities contradict a previously published very high superluminal velocity of 26 h^-1c for this source.

Recommended Citation

Piner, B., & Kingham, K. A. (1997). A Slower Superluminal Velocity for the Quasar 1156+295. The Astrophysical Journal, 485, L61. Retrieved from https://poetcommons.whittier.edu/phys/63