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Low-efficiency long...
Low-efficiency long gamma-ray bursts : a case study with AT2020blt
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- Sarin, Nikhil (författare)
- Stockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Monash University, Australia; OzGrav - The A.R.C. Centre of Excellence for Gravitational Wave Discovery, Australia,Nordita SU; Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.;OzGrav ARC Ctr Excellence Gravitat Wave Discovery, Clayton, Vic 3800, Australia.;Stockholm Univ, Oskar Klein Ctr, Dept Phys, AlbaNova, SE-10691 Stockholm, Sweden.
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- Hamburg, R. (författare)
- Univ Alabama, Dept Space Sci, Huntsville, AL 35899 USA.;Univ Alabama, Ctr Space Plasma & Aeron Res, Huntsville, AL 35899 USA.
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- Burns, E. (författare)
- Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
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- Ashton, G. (författare)
- Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.;OzGrav ARC Ctr Excellence Gravitat Wave Discovery, Clayton, Vic 3800, Australia.;Royal Holloway Univ London, Egham TW20 0EX, Surrey, England.
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- Lasky, P. D. (författare)
- Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.;OzGrav ARC Ctr Excellence Gravitat Wave Discovery, Clayton, Vic 3800, Australia.
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- Lamb, G. P. (författare)
- Univ Leicester, Sch Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England.
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(creator_code:org_t)
- 2022-03-08
- 2022
- Engelska.
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Ingår i: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 512:1, s. 1391-1399
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- The Zwicky Transient Facility recently announced the detection of an optical transient AT2020blt at redshift z = 2.9, consistent with the afterglow of an on-axis gamma-ray burst. However, no prompt emission was observed. We analyse AT2020blt with detailed models, showing the data are best explained as the afterglow of an on-axis long gamma-ray burst, ruling out other hypotheses such as a cocoon and a low-Lorentz factor jet. We search Fermi data for prompt emission, setting deeper upper limits on the prompt emission than in the original detection paper. Together with KONUS-Wind observations, we show that the gamma-ray efficiency of AT2020blt is less than or similar to 0.3-4.5 per cent. We speculate that AT2020blt and AT2021any belong to the low-efficiency tail of long gamma-ray burst distributions that are beginning to be readily observed due to the capabilities of new observatories like the Zwicky Transient Facility.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- gamma-ray bursts
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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