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Related Experiment Video

Updated: Jul 18, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

A powerful bursting radio source towards the Galactic Centre.

Scott D Hyman¹, T Joseph W Lazio, Namir E Kassim

¹Department of Physics and Engineering, Sweet Briar College, Sweet Briar, Virginia 24595, USA. shyman@sbc.edu

|March 4, 2005

Summary

Astronomers discovered a new transient radio source, GCRT J1745-3009, near the Galactic Centre. Its unique burst characteristics suggest a previously unknown class of cosmic transient, offering insights into dynamic celestial events.

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Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

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Published on: July 30, 2020

Area of Science:

Radio astronomy
Astrophysics
Transient astronomical phenomena

Background:

Transient astronomical sources often signify explosive events and are typically powered by compact objects.
Radio astronomy offers high-time-resolution observations but is limited by narrow fields of view, leading to poor sampling of the dynamic radio sky.
Wide-field instruments in X-ray and gamma-ray bands routinely detect transient sources, unlike current radio astronomy capabilities.

Purpose of the Study:

To report the detection of a novel transient radio source, GCRT J1745-3009.
To characterize the burst properties of this new source and compare them to known radio transients.
To explore the implications of its high brightness temperature and energy density for emission mechanisms.

Main Methods:

Utilized a moderately wide-field monitoring program of the Galactic Centre region.
Conducted observations at a frequency of 0.33 GHz.
Analyzed the temporal characteristics and spectral properties of the detected bursts.

Main Results:

Detected a transient radio source, GCRT J1745-3009, in the Galactic Centre region.
Observed burst characteristics that are distinct from all known classes of radio transients.
Measured a brightness temperature of approximately 10^16 K, indicating extremely high energy density consistent with coherent emission.

Conclusions:

GCRT J1745-3009 represents a previously unknown class of transient radio source.
This discovery highlights the potential for new wide-field radio telescopes to uncover novel astronomical phenomena.
The findings suggest that the dynamic radio sky may host many more undiscovered transient classes.