activity
19952026
most citedRadioAstron Observations of the Quasar 3C273: a Challenge to the Brightness Temperature Limit

95 citations · 602 across the 22 of their papers we have counts for

collaborators

22 papers

astro-ph.EP2026

Radar observations of Europa in 2011-2024: New insights into radar scattering properties

Tunhui Xie, Jean-Luc Margot, Sebastiano Padovan +5

Three of Jupiter's Galilean satellites - Europa, Ganymede, and Callisto - are of particular scientific interest due to their icy shells and suspected subsurface oceans. However, th…

astro-ph.IM2021★ 37 cited

Green Bank Telescope: Overview and analysis of metrology systems and pointing performance

E. White, F. D. Ghigo, R. M. Prestage +7

With a 100mx110m off-axis paraboloid dish, the Green Bank Telescope (GBT) is the largest fully steerable radio telescope on Earth. A major challenge facing large ground-based radio…

astro-ph.EP2021★ 56 cited

Spin state and moment of inertia of Venus

Jean-Luc Margot, Donald B. Campbell, Jon D. Giorgini +4

Fundamental properties of the planet Venus, such as its internal mass distribution and variations in length of day, have remained unknown. We used Earth-based observations of radar…

astro-ph.GA2019★ 39 cited

Detection statistics of the RadioAstron AGN survey

Y. Y. Kovalev, N. S. Kardashev, K. V. Sokolovsky +57

The largest Key Science Program of the RadioAstron space VLBI mission is a survey of active galactic nuclei (AGN). The main goal of the survey is to measure and study the brightnes…

astro-ph.HE2019★ 8 cited

GBTrans: A commensal search for radio pulses with the Green Bank twenty metre telescope

Golnoosh Golpayegani, Duncan R. Lorimer, Steven W. Ellingson +7

We describe GBTrans, a real-time search system designed to find fast radio bursts (FRBs) using the 20-m radio telescope at the Green Bank Observatory. The telescope has been part o…

astro-ph.IM2018

The GBT Gain Curve at High Frequency

David T. Frayer, Frank Ghigo, Ronald J. Maddalena

Recent measurements at Q-band (43 GHz) have verified the improved performance of the GBT provided by the updated gravity model that was deployed in the fall of 2014. The measured g…