Probing quantum gravity using photons from a flare of the active galactic nucleus Markarian 501 observed by the MAGIC telescope
| dc.contributor.author | Antoranz Canales, Pedro | |
| dc.contributor.author | Barrio Uña, Juan Abel | |
| dc.contributor.author | Contreras González, José Luis | |
| dc.contributor.author | Fonseca González, María Victoria | |
| dc.contributor.author | Miranda Pantoja, José Miguel | |
| dc.contributor.author | Nieto Castaño, Daniel | |
| dc.date.accessioned | 2023-06-20T10:37:26Z | |
| dc.date.available | 2023-06-20T10:37:26Z | |
| dc.date.issued | 2008-10-16 | |
| dc.description | © Elsevier Science. The MAGIC Collaboration thanks the IAC for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma and gratefully acknowledges the support of the German BMBF and MPG, the Italian INFN and the Spanish CICYT. This work was also supported by ETH Research Grant TH 34/04 3 and the Polish MNiI Grant 1P03D01028. The work of J.E. and N.E.M. was partially supported by the European Union through the Marie Curie Research and Training Network UniverseNet MRTN-CT-2006-035863, and that of D.V.N. by DOE grant DE-FG02-95ER40917. | |
| dc.description.abstract | We analyze the timing of photons observed by the MAGIC telescope during a flare of the active galactic nucleus Mkn 501 for a possible correlation with energy, as suggested by some models of quantum gravity (QG), which predict a vacuum refractive index similar or equal to 1 + (E/M-QGn)(n), n = 1, 2. Parametrizing the delay between gamma-rays of different energies as Delta t = +/-tau E-1 or Delta t = +/-tau E-q(2), we find tau(1) = (0.030 +/- 0.012) s/GeV at the 2.5-sigma level, and tau(q) = (3.71 +/- 2.57) x 10(-6) s/GeV2, respectively. We use these results to establish lower limits M-QG1 > 0.21 X 10(18) GeV and M-QG2 > 0.26 x 10(11) GeV at the 95% C.L. Monte Carlo studies confirm the MAGIC sensitivity to propagation effects at these levels. Thermal plasma effects in the source are negligible, but we cannot exclude the importance of some other source effect. (C) 2008 Elsevier B.V. All rights reserved. | |
| dc.description.department | Depto. de Estructura de la Materia, Física Térmica y Electrónica | |
| dc.description.faculty | Fac. de Ciencias Físicas | |
| dc.description.refereed | TRUE | |
| dc.description.sponsorship | German BMBF | |
| dc.description.sponsorship | German MPG | |
| dc.description.sponsorship | Italian INFN | |
| dc.description.sponsorship | Spanish CICYT | |
| dc.description.sponsorship | ETH Research Grant TH | |
| dc.description.sponsorship | Polish MNiI | |
| dc.description.sponsorship | European Union through the Marie Curie Research and Training Network UniverseNet | |
| dc.description.sponsorship | DOE | |
| dc.description.status | pub | |
| dc.eprint.id | https://eprints.ucm.es/id/eprint/23072 | |
| dc.identifier.doi | 10.1016/j.physletb.2008.08.053 | |
| dc.identifier.issn | 0370-2693 | |
| dc.identifier.officialurl | http://dx.doi.org/10.1016/j.physletb.2008.08.053 | |
| dc.identifier.relatedurl | http://www.sciencedirect.com | |
| dc.identifier.relatedurl | http://arxiv.org/abs/0708.2889 | |
| dc.identifier.uri | https://hdl.handle.net/20.500.14352/50808 | |
| dc.issue.number | 4 | |
| dc.journal.title | Physics Letters B | |
| dc.language.iso | eng | |
| dc.page.final | 257 | |
| dc.page.initial | 253 | |
| dc.publisher | Elsevier Science BV | |
| dc.relation.projectID | 34/04 3 | |
| dc.relation.projectID | 1P03D01028 | |
| dc.relation.projectID | MRTN-CT-2006-035863 | |
| dc.relation.projectID | DE-FG02-95ER40917 | |
| dc.rights.accessRights | open access | |
| dc.subject.cdu | 537 | |
| dc.subject.cdu | 539.1 | |
| dc.subject.keyword | Gamma-Ray Bursts | |
| dc.subject.keyword | String Theory | |
| dc.subject.keyword | Light | |
| dc.subject.keyword | Scale | |
| dc.subject.keyword | Emission | |
| dc.subject.keyword | Limits | |
| dc.subject.keyword | Speed | |
| dc.subject.keyword | Model | |
| dc.subject.keyword | Time. | |
| dc.subject.ucm | Electrónica (Física) | |
| dc.subject.ucm | Electricidad | |
| dc.subject.ucm | Física nuclear | |
| dc.subject.unesco | 2202.03 Electricidad | |
| dc.subject.unesco | 2207 Física Atómica y Nuclear | |
| dc.title | Probing quantum gravity using photons from a flare of the active galactic nucleus Markarian 501 observed by the MAGIC telescope | |
| dc.type | journal article | |
| dc.volume.number | 668 | |
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