A MERLIN and VLBI Survey of Faint Compact Radio Sources

Abstract

We have selected a field from the VLA FIRST Survey which is typical in all aspects except one: it contains a bright, but extremely compact VLBI calibrator - J1159+291. 127 unresolved FIRST sources with $S_{FIRST}\ge 10$ mJy lie within $2.5^{\circ }$ of this calibrator. $\lambda 6$ cm MERLIN observations with a resolution $\sim 60$ mas detect around half the sources. These detections form the basis of a sample of faint but compact radio sources which are ideally suited to follow-up VLBI observations.

2 pages, 2 figures (PS files), includes paspconf.sty, 164page.sty, 164def.sty. To appear in IAU Colloquium Proceedings 164: Radio Emission from Galactic and Extragalactic Compact Sources