First combined study on Lorentz Invariance violation from observations of energy-dependent time delays from multiple-type gamma-ray sources. I. Motivation, method description, and validation through simulations of H.E.S.S., MAGIC, and VERITAS data sets
| العنوان: | First combined study on Lorentz Invariance violation from observations of energy-dependent time delays from multiple-type gamma-ray sources. I. Motivation, method description, and validation through simulations of H.E.S.S., MAGIC, and VERITAS data sets |
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| المؤلفون: | Julien Bolmont, Sami Caroff, Markus Gaug, Alasdair Gent, Agnieszka Jacholkowska, Daniel Kerszberg, Christelle Levy, Tony Lin, Manel Martinez, Leyre Nogués, A. Nepomuk Otte, Cédric Perennes, Michele Ronco, Tomislav Terzić |
| المساهمون: | European Commission, Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), Generalitat de Catalunya, University of Rijeka, Croatian Science Foundation |
| بيانات النشر: | IOP Publishing, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Space and Planetary Science, Astronomy and Astrophysics |
| الوصف: | Gamma-ray astronomy has become one of the main experimental ways to test the modified dispersion relations (MDRs) of photons in vacuum, obtained in some attempts to formulate a theory of quantum gravity. The MDRs in use imply time delays that depend on the energy and that increase with distance following some function of redshift. The use of transient, or variable, distant and highly energetic sources already allows us to set stringent limits on the energy scale related to this phenomenon, usually thought to be of the order of the Planck energy, but robust conclusions on the existence of MDR-related propagation effects still require the analysis of a large population of sources. In order to gather the biggest sample of sources possible for MDR searches at teraelectronvolt energies, the H.E.S.S., MAGIC, and VERITAS collaborations enacted a joint task force to combine all their relevant data to constrain the quantum gravity energy scale. In the present article, the likelihood method used to combine the data and provide a common limit is described in detail and tested through simulations of recorded data sets for a gamma-ray burst, three flaring active galactic nuclei, and two pulsars. Statistical and systematic errors are assessed and included in the likelihood as nuisance parameters. In addition, a comparison of two different formalisms for distance dependence of the time lags is performed for the first time. In a second article, to appear later, the method will be applied to all relevant data from the three experiments. This project has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No. 754510, from the ERDF under the Spanish Ministerio de Ciencia e Innovación (MICINN), grants PID2019-107847RB-C41 and PID2019-107847RB-C42, the Centro de Excelencia "Severo Ochoa" (SEV-2016-0588), and from the CERCA program of the Generalitat de Catalunya. T.T. acknowledges funding from the University of Rijeka, project number uniri-prirod-18-48, and from the Croatian Science Foundation (HrZZ), project number IP-2016-06-9782. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc0059b8a6bb1768e3d34a6c689c0f0a http://hdl.handle.net/10261/296772 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....bc0059b8a6bb1768e3d34a6c689c0f0a |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |