276 citations · 401 across the 6 of their papers we have counts for
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Scientific Results from High-precision Astrometry at the Palomar Testbed Interferometer
Matthew W. Muterspaugh, Benjamin F. Lane, Maciej Konacki +4
A new observing mode for the Palomar Testbed Interferometer was developed in2002-2003 which enables differential astrometry at the level of 20 micro-arcseconds for binary systems w…
The Radio Wavelength Time Delay of Gravitational Lens 0957+561
Deborah B. Haarsma, Jacqueline N. Hewitt, Joseph Lehár +1
The gravitational lens 0957+561 was monitored with the Very Large Array from 1979 to 1997. The 6 cm light curve data from 1995-1997 and the 4 cm data from 1990-1997 are reported he…
Low Surface Brightness Radio Structure in the Field of Gravitational Lens 0957+561
I. M. Avruch, A. S. Cohen, J. Lehar +3
We have produced deep radio maps of the double quasar 0957+561 from multiple-epoch VLA observations. To achieve high sensitivity to extended structure we have re-reduced the best a…
The Gravitationally-Lensed Radio Source MG0751+2716
J. Lehar, B. F. Burke, S. R. Conner +6
We report the discovery of a new gravitationally lensed radio source. Radio maps of MG0751+2716 show four lensed images, which, at higher resolution, are resolved into long arcs of…
The 6 cm Light Curves of B0957+561, 1979-1994: New Features and Implications for the Time Delay
Deborah B. Haarsma, Jacqueline N. Hewitt, Joseph Lehár +1
We report on 15 years of VLA monitoring of the gravitational lens B0957+561 at 6 cm. Since our last report in 1992, there have been 32 additional observations, in which both images…