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Fermi and Swift Obs...
Fermi and Swift Observations of GRB 190114C : Tracing the Evolution of High-energy Emission from Prompt to Afterglow
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- Ajello, M. (author)
- Clemson Univ, Dept Phys & Astron, Kinard Lab Phys, Clemson, SC 29634 USA.
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- Arimoto, M. (author)
- Kanazawa Univ, Inst Sci & Engn, Fac Math & Phys, Kanazawa, Ishikawa 9201192, Japan.
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- Axelsson, Magnus (author)
- KTH,Stockholms universitet,Fysikum,KTH Royal Institute of Technology, Stockholm,Partikel- och astropartikelfysik
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show more...
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Baldini, L. (author)
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Barbiellini, G. (author)
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Bastieri, D. (author)
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Bellazzini, R. (author)
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Berretta, A. (author)
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Bissaldi, E. (author)
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Blandford, R. D. (author)
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Bonino, R. (author)
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Bottacini, E. (author)
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Bregeon, J. (author)
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Bruel, P. (author)
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Buehler, R. (author)
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Burns, E. (author)
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Buson, S. (author)
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Cameron, R. A. (author)
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Caputo, R. (author)
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Caraveo, P. A. (author)
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Cavazzuti, E. (author)
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Chen, S. (author)
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Chiaro, G. (author)
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Ciprini, S. (author)
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Cohen-Tanugi, J. (author)
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Costantin, D. (author)
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Cutini, S. (author)
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D'Ammando, F. (author)
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DeKlotz, M. (author)
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Luque, P. de la Torre (author)
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de Palma, F. (author)
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Desai, A. (author)
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Di Lalla, N. (author)
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Di Venere, L. (author)
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Dirirsa, F. Fana (author)
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Fegan, S. J. (author)
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Franckowiak, A. (author)
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Fukazawa, Y. (author)
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Funk, S. (author)
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Fusco, P. (author)
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Gargano, F. (author)
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Gasparrini, D. (author)
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Giglietto, N. (author)
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Gill, R. (author)
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Giordano, F. (author)
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Giroletti, M. (author)
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Granot, J. (author)
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Green, D. (author)
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Grenier, I. A. (author)
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Grondin, M. -H. (author)
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Guiriec, S. (author)
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Hays, E. (author)
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Horan, D. (author)
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- Jóhannesson, Guðlaugur (author)
- KTH,Stockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),University of Iceland, Iceland,Nordic Institute for Theoretical Physics NORDITA
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Kocevski, D. (author)
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Kovac'evic', M. (author)
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Kuss, M. (author)
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- Larsson, Stefan (author)
- Högskolan Dalarna,KTH,Partikel- och astropartikelfysik,Naturvetenskap,KTH / The Oskar Klein Centre for Cosmoparticle Physics, AlbaNova
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Latronico, L. (author)
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Lemoine-Goumard, M. (author)
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Li, J. (author)
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Liodakis, I. (author)
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Longo, F. (author)
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Loparco, F. (author)
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Lovellette, M. N. (author)
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Lubrano, P. (author)
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Maldera, S. (author)
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Malyshev, D. (author)
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Manfreda, A. (author)
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Marti-Devesa, G. (author)
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Mazziotta, M. N. (author)
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McEnery, J. E. (author)
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Mereu, I. (author)
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Meyer, M. (author)
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Michelson, P. F. (author)
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Mitthumsiri, W. (author)
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Mizuno, T. (author)
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Monzani, M. E. (author)
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Moretti, E. (author)
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Morselli, A. (author)
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Moskalenko, I. V. (author)
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Negro, M. (author)
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Nuss, E. (author)
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Omodei, N. (author)
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Orienti, M. (author)
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Orlando, E. (author)
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Palatiello, M. (author)
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Paliya, V. S. (author)
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Paneque, D. (author)
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Pei, Z. (author)
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Persic, M. (author)
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Pesce-Rollins, M. (author)
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Petrosian, V. (author)
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Piron, F. (author)
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Poon, H. (author)
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Porter, T. A. (author)
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Principe, G. (author)
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Racusin, J. L. (author)
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Raino, S. (author)
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Rando, R. (author)
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Rani, B. (author)
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Razzano, M. (author)
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Razzaque, S. (author)
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Reimer, A. (author)
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Reimer, O. (author)
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- Ryde, Felix, 1970- (author)
- KTH,Partikel- och astropartikelfysik
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Parkinson, P. M. Saz (author)
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Serini, D. (author)
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Sgro, C. (author)
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Siskind, E. J. (author)
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Spandre, G. (author)
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Spinelli, P. (author)
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Tajima, H. (author)
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Takagi, K. (author)
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Takahashi, M. N. (author)
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Tak, D. (author)
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Thayer, J. B. (author)
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Thompson, D. J. (author)
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Torres, D. F. (author)
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Troja, E. (author)
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Valverde, J. (author)
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Van Klaveren, B. (author)
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Wood, K. (author)
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Yassine, M. (author)
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Zaharijas, G. (author)
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Mailyan, B. (author)
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Bhat, P. N. (author)
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Briggs, M. S. (author)
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Cleveland, W. (author)
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Giles, M. (author)
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Goldstein, A. (author)
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Hui, M. (author)
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Malacaria, Christian (author)
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Preece, R. (author)
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Roberts, O. J. (author)
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Veres, P. (author)
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Wilson-Hodge, C. (author)
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von Kienlin, A. (author)
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Cenko, S. B. (author)
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O'Brien, P. (author)
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Beardmore, A. P. (author)
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Lien, A. (author)
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Osborne, J. P. (author)
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Tohuvavohu, A. (author)
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D'Elia, V. (author)
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D'Ai, A. (author)
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Perri, M. (author)
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Gropp, J. (author)
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Klingler, N. (author)
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Capalbi, M. (author)
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Tagliaferri, G. (author)
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Stamatikos, M. (author)
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De Pasquale, M. (author)
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Clemson Univ, Dept Phys & Astron, Kinard Lab Phys, Clemson, SC 29634 USA Kanazawa Univ, Inst Sci & Engn, Fac Math & Phys, Kanazawa, Ishikawa 9201192, Japan. (creator_code:org_t)
- 2020-02-06
- 2020
- English.
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In: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 890:1
- Related links:
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https://doi.org/10.3...
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https://doi.org/10.3...
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https://du.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.3...
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https://urn.kb.se/re...
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https://urn.kb.se/re...
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Abstract
Subject headings
Close
- We report on the observations of gamma-ray burst (GRB) 190114C by the Fermi Gamma -ray Space Telescope and the Neil Gehrels Swift Observatory. The prompt gamma-ray emission was detected by the Fermi GRB Monitor (GBM), the Fermi Large Area Telescope (LAT), and the Swift Burst Alert Telescope (BAT) and the long-lived afterglow emission was subsequently observed by the GBM, LAT, Swift X-ray Telescope (XRT), and Swift UV Optical Telescope. The early -time observations reveal multiple emission components that evolve independently, with a delayed power-law component that exhibits significant spectral attenuation above 40 MeV in the first few seconds of the burst. This power-law component transitions to a harder spectrum that is consistent with the afterglow emission observed by the XRT at later times. This afterglow component is clearly identifiable in the GBM and BAT light curves as a slowly fading emission component on which the rest of the prompt emission is superimposed. As a result, we are able to observe the transition from internal-shock- to external-shock-dominated emission. We find that the temporal and spectral evolution of the broadband afterglow emission can be well modeled as synchrotron emission from a forward shock propagating into a wind -like circumstellar environment. We estimate the initial bulk Lorentz factor using the observed high-energy spectral cutoff. Considering the onset of the afterglow component, we constrain the deceleration radius at which this forward shock begins to radiate in order to estimate the maximum synchrotron energy as a function of time. We find that even in the LAT energy range, there exist high-energy photons that are in tension with the theoretical maximum energy that can be achieved through synchrotron emission from a shock. These violations of the maximum synchrotron energy are further compounded by the detection of very high-energy (VHE) emission above 300 GeV by MAGIC concurrent with our observations. We conclude that the observations of VHE photons from GRB 190114C necessitates either an additional emission mechanism at very high energies that is hidden in the synchrotron component in the LAT energy range, an acceleration mechanism that imparts energy to the particles at a rate that is faster than the electron synchrotron energy -loss rate, or revisions of the fundamental assumptions used in estimating the maximum photon energy attainable through the synchrotron process.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Utbildning och lärande
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
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Ajello, M.
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Arimoto, M.
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Axelsson, Magnus
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Baldini, L.
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Barbiellini, G.
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Bastieri, D.
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show more...
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Bellazzini, R.
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Berretta, A.
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Bissaldi, E.
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Blandford, R. D.
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Bonino, R.
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Bottacini, E.
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Bregeon, J.
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Bruel, P.
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Buehler, R.
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Burns, E.
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Buson, S.
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Cameron, R. A.
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Caputo, R.
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Caraveo, P. A.
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Cavazzuti, E.
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Chen, S.
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Chiaro, G.
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Ciprini, S.
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Cohen-Tanugi, J.
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Costantin, D.
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Cutini, S.
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D'Ammando, F.
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DeKlotz, M.
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Luque, P. de la ...
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de Palma, F.
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Desai, A.
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Di Lalla, N.
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Di Venere, L.
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Dirirsa, F. Fana
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Fegan, S. J.
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Franckowiak, A.
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Fukazawa, Y.
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Funk, S.
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Fusco, P.
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Gargano, F.
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Gasparrini, D.
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Giglietto, N.
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Gill, R.
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Giordano, F.
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Giroletti, M.
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Granot, J.
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Green, D.
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Grenier, I. A.
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Grondin, M. -H.
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Guiriec, S.
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Hays, E.
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Horan, D.
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Jóhannesson, Guð ...
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Kocevski, D.
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Kovac'evic', M.
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Kuss, M.
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Larsson, Stefan
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Latronico, L.
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Lemoine-Goumard, ...
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Li, J.
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Liodakis, I.
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Longo, F.
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Loparco, F.
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Lovellette, M. N ...
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Lubrano, P.
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Maldera, S.
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Malyshev, D.
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Manfreda, A.
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Marti-Devesa, G.
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Mazziotta, M. N.
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McEnery, J. E.
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Mereu, I.
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Meyer, M.
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Michelson, P. F.
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Mitthumsiri, W.
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Mizuno, T.
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Monzani, M. E.
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Moretti, E.
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Morselli, A.
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Moskalenko, I. V ...
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Negro, M.
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Nuss, E.
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Omodei, N.
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Orienti, M.
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Orlando, E.
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Palatiello, M.
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Paliya, V. S.
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Paneque, D.
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Pei, Z.
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Persic, M.
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Pesce-Rollins, M ...
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Petrosian, V.
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Piron, F.
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Poon, H.
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Porter, T. A.
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Principe, G.
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Racusin, J. L.
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Raino, S.
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Rando, R.
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Rani, B.
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Razzano, M.
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Razzaque, S.
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Reimer, A.
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Reimer, O.
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Ryde, Felix, 197 ...
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Parkinson, P. M. ...
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Serini, D.
-
Sgro, C.
-
Siskind, E. J.
-
Spandre, G.
-
Spinelli, P.
-
Tajima, H.
-
Takagi, K.
-
Takahashi, M. N.
-
Tak, D.
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Thayer, J. B.
-
Thompson, D. J.
-
Torres, D. F.
-
Troja, E.
-
Valverde, J.
-
Van Klaveren, B.
-
Wood, K.
-
Yassine, M.
-
Zaharijas, G.
-
Mailyan, B.
-
Bhat, P. N.
-
Briggs, M. S.
-
Cleveland, W.
-
Giles, M.
-
Goldstein, A.
-
Hui, M.
-
Malacaria, Chris ...
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Preece, R.
-
Roberts, O. J.
-
Veres, P.
-
Wilson-Hodge, C.
-
von Kienlin, A.
-
Cenko, S. B.
-
O'Brien, P.
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Beardmore, A. P.
-
Lien, A.
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Osborne, J. P.
-
Tohuvavohu, A.
-
D'Elia, V.
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D'Ai, A.
-
Perri, M.
-
Gropp, J.
-
Klingler, N.
-
Capalbi, M.
-
Tagliaferri, G.
-
Stamatikos, M.
-
De Pasquale, M.
-
show less...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Stockholm University
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Royal Institute of Technology
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Högskolan Dalarna