{ "id": "2102.11248", "version": "v1", "published": "2021-02-22T18:32:42.000Z", "updated": "2021-02-22T18:32:42.000Z", "title": "Search for Lorentz Invariance Violation from stacked Gamma-Ray Burst spectral lag data", "authors": [ "Rajdeep Agrawal", "Haveesh Singirikonda", "Shantanu Desai" ], "comment": "17 pages, 3 figures", "categories": [ "astro-ph.HE", "astro-ph.CO" ], "abstract": "A number of works have found evidence for a turn-over in the spectral lag data for individual Gamma-Ray Bursts (GRBs), caused by an energy-dependent speed of light, which could be a possible manifestation of Lorentz invariance violation (LIV). Here, we stack spectral lag data from a total of 37 GRBs (with a total of 91 measurements), to verify if the combined data is consistent with a unified model consisting of intrinsic astrophysical emission, along with another contribution due to LIV. We then carry out Bayesian model comparison to ascertain if this combined spectral lag data shows a preference for an energy-dependent speed of light, as compared to an intrinsic astrophysical emission mechanism. We do not find a decisive evidence for such an energy-dependent speed of light for two different models of LIV. Furthermore, none of the models considered provide a good fit to the stacked spectral lag data.", "revisions": [ { "version": "v1", "updated": "2021-02-22T18:32:42.000Z" } ], "analyses": { "keywords": [ "gamma-ray burst spectral lag data", "stacked gamma-ray burst spectral lag", "lorentz invariance violation" ], "note": { "typesetting": "TeX", "pages": 17, "language": "en", "license": "arXiv", "status": "editable" } } }