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Gamma ray burst studies with THESEUS

Ghirlanda, G; Salvaterra, R; Toffano, M; Ronchini, S; Guidorzi, C; Oganesyan, G; Ascenzi, S; ... Zane, S; + view all (2021) Gamma ray burst studies with THESEUS. Experimental Astronomy 10.1007/s10686-021-09763-3. Green open access

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Abstract

Gamma-ray Bursts (GRBs) are the most powerful transients in the Universe, over– shining for a few seconds all other γ -ray sky sources. Their emission is produced within narrowly collimated relativistic jets launched after the core–collapse of massive stars or the merger of compact binaries. THESEUS will open a new window for the use of GRBs as cosmological tools by securing a statistically significant sample of high-z GRBs, as well as by providing a large number of GRBs at low–intermediate redshifts extending the current samples to low luminosities. The wide energy band and unprecedented sensitivity of the Soft X-ray Imager (SXI) and X-Gamma rays Imaging Spectrometer (XGIS) instruments provide us a new route to unveil the nature of the prompt emission. For the first time, a full characterisation of the prompt emission spectrum from 0.3 keV to 10 MeV with unprecedented large count statistics will be possible revealing the signatures of synchrotron emission. SXI spectra, extending down to 0.3 keV, will constrain the local metal absorption and, for the brightest events, the progenitors’ ejecta composition. Investigation of the nature of the internal energy dissipation mechanisms will be obtained through the systematic study with XGIS of the sub-second variability unexplored so far over such a wide energy range. THESEUS will follow the spectral evolution of the prompt emission down to the soft X–ray band during the early steep decay and through the plateau phase with the unique ability of extending above 10 keV the spectral study of these early afterglow emission phases.

Type: Article
Title: Gamma ray burst studies with THESEUS
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s10686-021-09763-3
Publisher version: http://dx.doi.org/10.1007/s10686-021-09763-3
Language: English
Additional information: Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Keywords: Gamma ray bursts, Synchrotron radiation, Jet structure, SWIFT/BAT6 COMPLETE SAMPLE, AFTERGLOW LIGHT CURVES, STAR-FORMATION CLUES, LUMINOSITY FUNCTION, PHOTOSPHERIC EMISSION, BIASED TRACERS, HOST GALAXIES, JET STRUCTURE, ERROR BOX, REDSHIFT
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/10131523
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