259 citations · 1.8k across the 51 of their papers we have counts for
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Quasar Proper Motions and Low-Frequency Gravitational Waves
Carl R. Gwinn, T. Marshall Eubanks, Ted Pyne +2
We report observational upper limits on the mass-energy of the cosmological gravitational-wave background, from limits on proper motions of quasars. Gravitational waves with period…
Angular Broadening of Nearby Pulsars
M. C. Britton, C. R. Gwinn, M. J. Ojeda
We conducted a very long baseline interferometric observation of 5 nearby pulsars and did not resolve the scattering disks of any of these sources. Using our upper limits on the an…
VLBI Imaging of Water Maser Emission from the Nuclear Torus of NGC 1068
L. J. Greenhill, C. R. Gwinn, R. Antonucci +1
We have made the first VLBI synthesis images of the H2O maser emission associated with the central engine of the Seyfert galaxy NGC 1068. Emission extends about +/-300 km/s from th…
Size of the Vela Pulsar's Radio Emission Region: 500 km
C. R. Gwinn, M. J. Ojeda, M. C. Britton +9
We use interstellar scattering of the Vela pulsar to determine the size of its emission region. From interferometric phase variations on short baselines, we find that radio-wave sc…