Galactic Radio Explorer: An All-sky Monitor for Bright Radio Bursts
Journal article, 2021

We present the Galactic Radio Explorer (GReX), an all-sky monitor to probe the brightest bursts in the radio sky. Building on the success of STARE2, we will search for fast radio bursts emitted from Galactic magnetars as well as bursts from nearby galaxies. GReX will search down to similar to ten microseconds time resolution, allowing us to find new super giant radio pulses from Milky Way pulsars and study their broadband emission. The proposed instrument will employ ultra-wide band (0.7-2 GHz) feeds coupled to a high-performance (receiver temperature <10 K) low noise amplifier originally developed for the DSA-110 and DSA-2000 projects. In GReX Phase I (GReX-I), unit systems will be deployed at Owens Valley Radio Observatory and Big Smoky Valley, Nevada. Phase II will expand the array, placing feeds in India, Australia, and elsewhere in order to build up to continuous coverage of nearly 4 pi steradians and to increase our exposure to the Galactic plane. We model the local magnetar population to forecast for GReX, finding the improved sensitivity and increased exposure to the Galactic plane could lead to dozens of FRB-like bursts per year.


Liam Connor

California Institute of Technology (Caltech)

Kiran A. Shila

California Institute of Technology (Caltech)

Shrinivas R. Kulkarni

California Institute of Technology (Caltech)

Jonas Flygare

Chalmers, Space, Earth and Environment, Onsala Space Observatory, Electronics Laboratory

Gregg Hallinan

California Institute of Technology (Caltech)

Dongzi Li

California Institute of Technology (Caltech)

Wenbin Lu

California Institute of Technology (Caltech)

Vikram Ravi

California Institute of Technology (Caltech)

Sander Weinreb

California Institute of Technology (Caltech)

Publications of the Astronomical Society of the Pacific

0004-6280 (ISSN) 1538-3873 (eISSN)

Vol. 133 1025 075001

Subject Categories

Astronomy, Astrophysics and Cosmology



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