research
Long Gamma-Ray Bursts Doubled Their Supernova-Less Candidate List
Two decades of Swift data produced a rate of 0.5 ± 0.2 events per cubic gigaparsec per year before beaming correction.
Summary
Two decades of Swift data produced a rate of 0.5 ± 0.2 events per cubic gigaparsec per year before beaming correction.
A search below redshift 0.35 more than doubled the candidate set with robust supernova limits and distance scales. The small, heterogeneous sample spans star-forming, dusty and quiescent hosts; plausible beaming corrections remain compatible with several compact-merger channels but do not establish one origin.
Why it matters
Two decades of Swift data produced a rate of 0.5 ± 0.2 events per cubic gigaparsec per year before beaming correction.
Limits and context
- The small, heterogeneous sample spans star-forming, dusty and quiescent hosts; plausible beaming corrections remain compatible with several compact-merger channels but do not establish one origin.
Key claims
Two decades of Swift data produced a rate of 0.5 ± 0.2 events per cubic gigaparsec per year before beaming correction.
Qualification: The small, heterogeneous sample spans star-forming, dusty and quiescent hosts; plausible beaming corrections remain compatible with several compact-merger channels but do not establish one origin.
Evidence: source-2026-09-19-017
Sources
- arXiv preprint 2609.20787arXiv · primary research
Corrections
No corrections have been recorded for this story.