42 citations · 170 across the 16 of their papers we have counts for
11 papers · 1 filter
First release of Apertif imaging survey data
Elizabeth A. K. Adams, B. Adebahr, W. J. G. de Blok +56
(Abridged) Apertif is a phased-array feed system for WSRT, providing forty instantaneous beams over 300 MHz of bandwidth. A dedicated survey program started on 1 July 2019, with th…
Characterising the Apertif primary beam response
H. Dénes, K. M. Hess, E. A. K. Adams +27
Context. Phased Array Feeds (PAFs) are multi element receivers in the focal plane of a telescope that make it possible to form simultaneously multiple beams on the sky by combining…
Apercal -- The Apertif Calibration Pipeline
B. Adebahr, R. Schulz, T. J. Dijkema +33
Apertif (APERture Tile In Focus) is one of the Square Kilometre Array (SKA) pathfinder facilities. The Apertif project is an upgrade to the 50-year-old Westerbork Synthesis Radio T…
Apertif, Phased Array Feeds for the Westerbork Synthesis Radio Telescope
W. A. van Cappellen, T. A. Oosterloo, M. A. W. Verheijen +87
We describe the APERture Tile In Focus (Apertif) system, a phased array feed (PAF) upgrade of the Westerbork Synthesis Radio Telescope which has transformed this telescope into a h…
Numerical Results for the System Noise Temperature of an Aperture Array Tile and Comparison with Measurements
M. V. Ivashina, E. E. M. Woestenburg, L. Bakker +1
The purpose of this report is to document the noise performance of a complex beamforming array antenna system and to characterize the recently developed noise measurement facility…
Element gain drifts as an imaging dynamic range limitation in PAF-based interferometers
O. M. Smirnov, M. V. Ivashina
Interferometry with phased-array feeds (PAFs) presents new calibration challenges in comparison with single-pixel feeds. In particular, temporal instability of the compound beam pa…
Experimental Results of the Sensitivity of a Low Noise Aperture Array Tile for the SKA
E. E. M. Woestenburg, L. Bakker, M. V. Ivashina
Aperture arrays have been studied extensively for application in the next generation of large radio telescopes for astronomy, requiring extremely low noise performance. Prototype a…
An Axi-Symmetric Segmented Composite SKA Dish Design: Performance and Production Analysis
M. V. Ivashina, R. Bakker, J. G. bij de Vaate +4
A concept of an axi-symmetric dish as antenna reflector for the next generation radio telescope - the Square Kilometre Array (SKA) - is presented. The reflector is based on the use…
Performance of Polarimetric Beamformers for Phased Array Radio Telescopes
Marianna V. Ivashina, Stefan J. Wijnholds, Rob Maaskant +1
The results of four recently introduced beamforming schemes for phased array systems are discussed, each of which is capable to provide high sensitivity and accurate polarimetric p…
The latest on Apertif
Tom Oosterloo, Marc Verheijen, Wim van Cappellen
We describe a Phased Array Feed (PAF) system, called Apertif, which will be installed in the Westerbork Synthesis Radio Telescope (WSRT). The aim of Apertif is, at frequencies from…
Apertif - the focal-plane array system for the WSRT
Tom Oosterloo, Marc Verheijen, Wim van Cappellen +3
We describe a focal plane array (FPA) system, called Apertif, that is being developed for the Westerbork Synthesis Radio Telescope (WSRT). The aim of Apertif is to increase the ins…