683 citations · 1.1k across the 12 of their papers we have counts for
12 papers
A Model for Phased Array Feed
D. Anish Roshi, J. Richard Fisher
In this report we present a model for phased array feed (PAF) and compare the model predictions with measurements. A theory for loss-less PAF is presented first. To develop the the…
Performance of a highly sensitive, 19-element, dual-polarization, cryogenic L-band Phased Array Feed on the Green Bank Telescope
D. Anish Roshi, W. Shillue, B. Simon +26
A new 1.4 GHz 19-element, dual-polarization, cryogenic phased array feed (PAF) radio astronomy receiver has been developed for the Robert C. Byrd Green Bank Telescope (GBT) as part…
A Highly-Sensitive Cryogenic Phased Array Feed for the Green Bank Telescope
D. Anish Roshi, W. Shillue, J. R. Fisher +15
In this paper, we describe the development of a new L-band (1.4 GHz) Cryogenic Phased Array Feed (PAF) system, referred to as the GBT2 array. Results from initial measurements made…
Cosmicflows-2: The Data
R. Brent Tully, Helene M. Courtois, Andrew E. Dolphin +11
Cosmicflows-2 is a compilation of distances and peculiar velocities for over 8000 galaxies. Numerically the largest contributions come from the luminosity-linewidth correlation for…
Unformatted Digital Fiber-Optic Data Transmission for Radio Astronomy Front-Ends
Matthew A. Morgan, J. Richard Fisher, Jason J. Castro
We report on the development of a prototype integrated receiver front-end that combines all conversions from RF to baseband, from analog to digital, and from copper to fiber into o…
Cosmic Flows : Green Bank and Parkes HI observations
Helene M. Courtois, R. Brent Tully, D. I. Makarov +4
The neutral hydrogen properties of 1,822 galaxies are being studied with the Green Bank 100m and the Parkes 64m telescopes as part of the 'Cosmic Flows' program. Observed parameter…