Quantum-Spacetime Scenarios and Soft Spectral Lags of the Remarkable GRB130427A
We process the Fermi LAT data on GRB130427A using the Fermi Science Tools, and we summarize some of the key facts that render this observation truly remarkable. We then perform a search of spectral lags, of the type that has been of interest for its relevance in quantum-spacetime research. We do fin...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2014/597384 |
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| author | Giovanni Amelino-Camelia Fabrizio Fiore Dafne Guetta Simonetta Puccetti |
| author_facet | Giovanni Amelino-Camelia Fabrizio Fiore Dafne Guetta Simonetta Puccetti |
| author_sort | Giovanni Amelino-Camelia |
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| description | We process the Fermi LAT data on GRB130427A using the Fermi Science Tools, and we summarize some of the key facts that render this observation truly remarkable. We then perform a search of spectral lags, of the type that has been of interest for its relevance in quantum-spacetime research. We do find some evidence of systematic soft spectral lags: when confining the analysis to photons of energies greater than 5 GeV there is an early hard development of minibursts within the burst. The effect is well characterized by a linear dependence, within such a miniburst, of the detection time on energy. We also observe that some support for these features is noticeable also in earlier Fermi-LAT GRBs. Some aspects of the comparison of these features for GRBs at different redshifts could be described within a quantum-spacetime picture, but taking into account results previously obtained by other studies we favour the interpretation as intrinsic properties of GRBs. Even if our spectral lags do turn out to have astrophysical origin their understanding will be important for quantum-spacetime research, since any attempt to reveal minute quantum-spacetime-induced spectral lags evidently requires a good understanding of intrinsic mechanisms at the sources that can produce spectral lags. |
| format | Article |
| id | doaj-art-f5d2fbc5ede545e7b1a15b8beae4f8bc |
| institution | OA Journals |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
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| series | Advances in High Energy Physics |
| spelling | doaj-art-f5d2fbc5ede545e7b1a15b8beae4f8bc2025-08-20T02:22:26ZengWileyAdvances in High Energy Physics1687-73571687-73652014-01-01201410.1155/2014/597384597384Quantum-Spacetime Scenarios and Soft Spectral Lags of the Remarkable GRB130427AGiovanni Amelino-Camelia0Fabrizio Fiore1Dafne Guetta2Simonetta Puccetti3Dipartimento di Fisica, Sapienza Università di Roma and INFN, Sez. Roma1, P.le A. Moro 2, 00185 Roma, ItalyINAF-Osservatorio Astronomico di Roma, Via Frascati 33, 00040 Monteporzio Catone, ItalyINAF-Osservatorio Astronomico di Roma, Via Frascati 33, 00040 Monteporzio Catone, ItalyINAF-Osservatorio Astronomico di Roma, Via Frascati 33, 00040 Monteporzio Catone, ItalyWe process the Fermi LAT data on GRB130427A using the Fermi Science Tools, and we summarize some of the key facts that render this observation truly remarkable. We then perform a search of spectral lags, of the type that has been of interest for its relevance in quantum-spacetime research. We do find some evidence of systematic soft spectral lags: when confining the analysis to photons of energies greater than 5 GeV there is an early hard development of minibursts within the burst. The effect is well characterized by a linear dependence, within such a miniburst, of the detection time on energy. We also observe that some support for these features is noticeable also in earlier Fermi-LAT GRBs. Some aspects of the comparison of these features for GRBs at different redshifts could be described within a quantum-spacetime picture, but taking into account results previously obtained by other studies we favour the interpretation as intrinsic properties of GRBs. Even if our spectral lags do turn out to have astrophysical origin their understanding will be important for quantum-spacetime research, since any attempt to reveal minute quantum-spacetime-induced spectral lags evidently requires a good understanding of intrinsic mechanisms at the sources that can produce spectral lags.http://dx.doi.org/10.1155/2014/597384 |
| spellingShingle | Giovanni Amelino-Camelia Fabrizio Fiore Dafne Guetta Simonetta Puccetti Quantum-Spacetime Scenarios and Soft Spectral Lags of the Remarkable GRB130427A Advances in High Energy Physics |
| title | Quantum-Spacetime Scenarios and Soft Spectral Lags of the Remarkable GRB130427A |
| title_full | Quantum-Spacetime Scenarios and Soft Spectral Lags of the Remarkable GRB130427A |
| title_fullStr | Quantum-Spacetime Scenarios and Soft Spectral Lags of the Remarkable GRB130427A |
| title_full_unstemmed | Quantum-Spacetime Scenarios and Soft Spectral Lags of the Remarkable GRB130427A |
| title_short | Quantum-Spacetime Scenarios and Soft Spectral Lags of the Remarkable GRB130427A |
| title_sort | quantum spacetime scenarios and soft spectral lags of the remarkable grb130427a |
| url | http://dx.doi.org/10.1155/2014/597384 |
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