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127 papers
A new technique to measure noise parameters for global 21-cm experiments
Danny C. Price, Cheuk-Yu Edward Tong, Adrian T. Sutinjo +2
Radiometer experiments to detect 21-cm Hydrogen line emission from the Cosmic Dawn and Epoch of Reionization rely upon precise absolute calibration. During calibration, noise gener…
Measuring Noise Parameters Using an Open, Short, Load, and 1/8-wavelength Cable as Source Impedances
Danny C. Price, Cheuk-Yu Edward Tong, Adrian T. Sutinjo +2
Noise parameters are a set of four measurable quantities which determine the noise performance of a radio-frequency device under test. The noise parameters of a 2-port device can b…
Antenna beam characterisation for the global 21cm experiment LEDA and its impact on signal model parameter reconstruction
M. Spinelli, G. Kyriakou, G. Bernardi +4
Cosmic Dawn, the onset of star formation in the early universe, can in principle be studied via the 21cm transition of neutral hydrogen, for which a sky-averaged absorption signal,…
Imaging Spectroscopy of CME-Associated Solar Radio Bursts
Sherry Chhabra, Dale E. Gary, Gregg Hallinan +4
We present first results of a solar radio event observed with the Owens Valley Radio Observatory Long Wavelength Array (OVRO-LWA) at metric wavelengths. We examine a complex event…
An Accreting, Anomalously Low Mass Black Hole at the Center of Low Mass Galaxy IC 750
Ingyin Zaw, Michael J. Rosenthal, Ivan Yu. Katkov +5
We present a multi-wavelength study of the active galactic nucleus in the nearby ( Mpc) low mass galaxy IC 750, which has circumnuclear 22 GHz water maser emission. The mas…
Self-triggered radio detection and identification of cosmic air showers with the OVRO-LWA
Ryan Monroe, Andres Romero Wolf, Gregg Hallinan +12
A successful ground array Radio Frequency (RF)-only self-trigger on 10 high-energy cosmic ray events is demonstrated with 256 dual-polarization antennas of the Owens Valley Radio O…