162 citations · 804 across the 24 of their papers we have counts for
24 papers
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…
Interferometric Phase Calibration Sources in the Declination Range 0deg to -30deg
Joshua N. Winn, Alok R. Patnaik, J. M. Wrobel
We present a catalog of 321 compact radio sources in the declination range 0deg > delta > -30deg. The positions of these sources have been measured with a two-dimensional rms accur…
PMN J0134-0931: A gravitationally lensed quasar with an unusual radio morphology
Joshua N. Winn, James E. J. Lovell, Hsiao-Wen Chen +4
The radio-loud quasar PMN J0134-0931 was discovered to have an unusual morphology during our search for gravitational lenses. In VLA and MERLIN images, there are 5 compact componen…
Determination of time delay from the gravitational lens B1422+231
A. R. Patnaik, D. Narasimha
We present the radio light curves of lensed images of the gravitational lens B1422+231. The observations have been carried out using the VLA at 8.4 and 15 GHz over a period of 197…
Sub-milliarcsec-scale structure of the gravitational lens B1600+434
Alok R. Patnaik, Athol J. Kemball
In the gravitational lens system B1600+434 the brighter image, A, is known to show rapid variability which is not detected in the weaker image, B (Koopmans & de Bruyn 2000). Since…
2016+112: A Gravitationally Lensed Type-II Quasar
L. V. E. Koopmans, M. A. Garrett, R. D. Blandford +3
A single-screen model of the gravitational lens system 2016+112 is proposed, that explains recent Hubble Space Telescope} (HST) infrared (NICMOS-F160W) observations and new high-re…