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28 papers · 2 filters
AUTO-MULTITHRESH: A General Purpose Automasking Algorithm
Amanda A. Kepley, Takahiro Tsutsumi, Crystal L. Brogan +4
Producing images from interferometer data requires accurate modeling of the sources in the field of view, which is typically done using the CLEAN algorithm. Given the large number…
The Next Generation Very Large Array
James Di Francesco, Dean Chalmers, Nolan Denman +17
The next generation Very Large Array (ngVLA) is a transformational radio observatory being designed by the U.S. National Radio Astronomy Observatory (NRAO). It will provide order o…
Mitigating Internal Instrument Coupling II: A Method Demonstration with the Hydrogen Epoch of Reionization Array
Nicholas S. Kern, Aaron R. Parsons, Joshua S. Dillon +63
We present a study of internal reflection and cross coupling systematics in Phase I of the Hydrogen Epoch of Reionization Array (HERA). In a companion paper, we outlined the mathem…
Direct Wide-Field Radio Imaging in Real-Time at High Time Resolution using Antenna Electric Fields
James Kent, Adam P. Beardsley, Landman Bester +6
The recent demonstration of a real-time direct imaging radio interferometry correlator represents a new capability in radio astronomy. However wide field imaging with this method i…
A GMRT 150 MHz Search for Variables and Transients in Stripe 82
A. Hajela, K. P. Mooley, H. T. Intema +1
We have carried out a dedicated transient survey of 300 deg of the SDSS Stripe 82 region using the Giant Meterwavelength Radio Telescope (GMRT) at 150 MHz. Our multi-epoch obse…
Absolute Calibration Strategies for the Hydrogen Epoch of Reionization Array and Their Impact on the 21 cm Power Spectrum
Nicholas S. Kern, Joshua S. Dillon, Aaron R. Parsons +69
We discuss absolute calibration strategies for Phase I of the Hydrogen Epoch of Reionization Array (HERA), which aims to measure the cosmological 21 cm signal from the Epoch of Rei…