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Investigation of the obscuring circumnuclear torus in the active galaxy Mrk231
Hans-Rainer Kl"ockner, Willem A. Baan, Michael A. Garrett
Here we report on observations of powerful hydroxyl (OH) line emissions that trace the obscuring material within the circumnuclear environment of the galaxy Markarian 231. The hydr…
The Deepest and Widest VLBI Survey yet: VLBA+GBT 1.4 GHz observations in Bootes
M. A. Garrett, J. M. Wrobel, R. Morganti
We present preliminary results from the deepest VLBI observations yet conducted. VLBA+GBT 1.4 GHz observations of a region within NOAO-N, reach an r.m.s. noise level of 9 microJy p…
Changes in the measured image separation of the gravitational lens system, PKS 1830-211
C. Jin, M. A. Garrett, S. Nair +3
We present eight epochs of 43 GHz, dual-polarisation VLBA observations of the gravitational lens system PKS 1830-211, made over fourteen weeks. A bright, compact ``core'' and a fai…