lnu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Revealing x-ray and gamma ray temporal and spectral similarities in the GRB 190829A afterglow
University of Namibia, Namibia.
Dublin Inst Adv Studies, Ireland;Max Planck Inst Kernphys, Germany;Russian Armenian Univ RAU, Armenia.
Max Planck Inst Kernphys, Germany.
Aix Marseille University, France.
Show others and affiliations
2021 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 372, no 6546, p. 1081-1085Article in journal (Refereed) Published
Abstract [en]

Gamma-ray bursts (GRBs), which are bright flashes of gamma rays from extragalactic sources followed by fading afterglow emission, are associated with stellar core collapse events. We report the detection of very- high-energy (VHE) gamma rays from the afterglow of GRB 190829A, between 4 and 56 hours after the trigger, using the High Energy Stereoscopic System (H.E.S.S.). The low luminosity and redshift of GRB 190829A reduce both internal and external absorption, allowing determination of its intrinsic energy spectrum. Between energies of 0.18 and 3.3 tera-electron volts, this spectrum is described by a power law with photon index of 2.07 +/- 0.09, similar to the x-ray spectrum. The x-ray and VHE gamma- ray light curves also show similar decay profiles. These similar characteristics in the x-ray and gamma-ray bands challenge GRB afterglow emission scenarios.

Place, publisher, year, edition, pages
American Association of Advancement in Science , 2021. Vol. 372, no 6546, p. 1081-1085
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics, Astroparticle Physics
Identifiers
URN: urn:nbn:se:lnu:diva-105829DOI: 10.1126/science.abe8560ISI: 000657651200047PubMedID: 34083487Scopus ID: 2-s2.0-85107698023Local ID: 2021OAI: oai:DiVA.org:lnu-105829DiVA, id: diva2:1580093
Available from: 2021-07-13 Created: 2021-07-13 Last updated: 2024-11-21Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textPubMedScopus

Authority records

Becherini, YvonneBylund, TomasPunch, MichaelSenniappan, Mohanraj

Search in DiVA

By author/editor
Becherini, YvonneBylund, TomasPunch, MichaelSenniappan, Mohanraj
By organisation
Department of Physics and Electrical Engineering
In the same journal
Science
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar

doi
pubmed
urn-nbn

Altmetric score

doi
pubmed
urn-nbn
Total: 113 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf