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Updated: Jul 17, 2026
06:28
Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
Published on: January 30, 2020
Short gamma-ray bursts near and far
1Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield AL10 9AB, UK. levan@star.herts.ac.uk
Summary
Short gamma-ray bursts (GRBs) may have diverse origins. New observations reveal some short GRBs in the nearby universe and others at high redshifts, challenging previous conclusions about their progenitors.
Area of Science:
- Astrophysics
- Cosmic explosions
Background:
- Understanding short gamma-ray bursts (GRBs) advanced rapidly after 2005.
- Previously, short GRBs were thought to originate at moderate redshifts in all galaxy types, suggesting compact binary mergers.
Purpose of the Study:
- To present new observational results challenging the established understanding of short GRB origins.
- To explore the implications of these findings for short GRB progenitor models.
Main Methods:
- Observation of several short gamma-ray bursts (GRBs).
Main Results:
- Some short GRBs are found at very low redshifts (below 100 Mpc).
- Other short GRBs are observed at high redshifts (z>2), comparable to long GRBs.
Conclusions:
- The population of short GRBs is more diverse than previously assumed.
- These findings suggest multiple progenitor pathways for short GRBs, not solely compact binary mergers.
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