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Galactic Radio Explorer: An All-sky Monitor for Bright Radio Bursts

Connor, Liam and Shila, Kiran A. and Kulkarni, Shrinivas R. and Flygare, Jonas and Hallinan, Gregg and Li, Dongzi and Lu, Wenbin and Ravi, Vikram and Weinreb, Sander (2021) Galactic Radio Explorer: An All-sky Monitor for Bright Radio Bursts. Publications of the Astronomical Society of the Pacific, 133 (1025). Art. No. 075001. ISSN 0004-6280. doi:10.1088/1538-3873/ac0bcc.

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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 ~ 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 4π 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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Connor, Liam0000-0002-7587-6352
Shila, Kiran A.0000-0003-4652-7038
Kulkarni, Shrinivas R.0000-0001-5390-8563
Flygare, Jonas0000-0002-0204-2891
Hallinan, Gregg0000-0002-7083-4049
Li, Dongzi0000-0001-7931-0607
Lu, Wenbin0000-0002-1568-7461
Ravi, Vikram0000-0002-7252-5485
Weinreb, Sander0000-0002-9353-6204
Additional Information:© 2021. The Astronomical Society of the Pacific. Received 2021 May 20; accepted 2021 June 11; published 2021 July 7. We thank Dale Gary and Dan Werthimer for helpful discussions, as well as an anonymous referee for valuable advice on the manuscript.
Group:Astronomy Department
Subject Keywords:Astronomical instrumentation; Magnetars; Transient sources
Issue or Number:1025
Classification Code:Unified Astronomy Thesaurus concepts: Astronomical instrumentation (799); Magnetars (992); Transient sources (1851)
Record Number:CaltechAUTHORS:20210202-095231043
Persistent URL:
Official Citation:Liam Connor et al 2021 PASP 133 075001
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107856
Deposited By: George Porter
Deposited On:03 Feb 2021 22:56
Last Modified:12 Jul 2021 20:03

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