Phase-resolved energy spectra of the Crab pulsar in the range of 50-400 GeV measured with the MAGIC telescopes

We use 73 h of stereoscopic data taken with the MAGIC telescopes to investigate the very high-energy (VHE) gamma-ray emission of the Crab pulsar. Our data show a highly significant pulsed signal in the energy range from 50 to 400 GeV in both the main pulse (P1) and the interpulse (P2) phase regions....

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Autores: Paredes i Poy, Josep Maria, Ribó Gomis, Marc, Munar i Adrover, Pere, Moldón Vara, Francisco Javier
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2012
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/150959
Acceso en línea:https://hdl.handle.net/2445/150959
Access Level:acceso abierto
Palabra clave:Raigs gamma
Estels
Púlsars
Gamma rays
Stars
Pulsars
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oai_identifier_str oai:diposit.ub.edu:2445/150959
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repository_id_str
spelling Phase-resolved energy spectra of the Crab pulsar in the range of 50-400 GeV measured with the MAGIC telescopesParedes i Poy, Josep MariaRibó Gomis, MarcMunar i Adrover, PereMoldón Vara, Francisco JavierRaigs gammaEstelsPúlsarsGamma raysStarsPulsarsWe use 73 h of stereoscopic data taken with the MAGIC telescopes to investigate the very high-energy (VHE) gamma-ray emission of the Crab pulsar. Our data show a highly significant pulsed signal in the energy range from 50 to 400 GeV in both the main pulse (P1) and the interpulse (P2) phase regions. We provide the widest spectra to date of the VHE components of both peaks, and these spectra extend to the energy range of satellite-borne observatories. The good resolution and background rejection of the stereoscopic MAGIC system allows us to cross-check the correctness of each spectral point of the pulsar by comparison with the corresponding (strong and well-known) Crab nebula flux. The spectra of both P1 and P2 are compatible with power laws with photon indices of 4.0 \pm 0.8 (P1) and 3.42 \pm 0.26 (P2), respectively, and the ratio P1/P2 between the photon counts of the two pulses is 0.54 \pm 0.12. The VHE emission can be understood as an additional component produced by the inverse Compton scattering of secondary and tertiary e\pm pairs on IR-UV photons.EDP Sciences2012info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/150959Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1051/0004-6361/201118166Astronomy & Astrophysics, 2012, vol. 540, p. 69Ahttps://doi.org/10.1051/0004-6361/201118166(c) The European Southern Observatory (ESO), 2012info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1509592026-05-27T06:46:51Z
dc.title.none.fl_str_mv Phase-resolved energy spectra of the Crab pulsar in the range of 50-400 GeV measured with the MAGIC telescopes
title Phase-resolved energy spectra of the Crab pulsar in the range of 50-400 GeV measured with the MAGIC telescopes
spellingShingle Phase-resolved energy spectra of the Crab pulsar in the range of 50-400 GeV measured with the MAGIC telescopes
Paredes i Poy, Josep Maria
Raigs gamma
Estels
Púlsars
Gamma rays
Stars
Pulsars
title_short Phase-resolved energy spectra of the Crab pulsar in the range of 50-400 GeV measured with the MAGIC telescopes
title_full Phase-resolved energy spectra of the Crab pulsar in the range of 50-400 GeV measured with the MAGIC telescopes
title_fullStr Phase-resolved energy spectra of the Crab pulsar in the range of 50-400 GeV measured with the MAGIC telescopes
title_full_unstemmed Phase-resolved energy spectra of the Crab pulsar in the range of 50-400 GeV measured with the MAGIC telescopes
title_sort Phase-resolved energy spectra of the Crab pulsar in the range of 50-400 GeV measured with the MAGIC telescopes
dc.creator.none.fl_str_mv Paredes i Poy, Josep Maria
Ribó Gomis, Marc
Munar i Adrover, Pere
Moldón Vara, Francisco Javier
author Paredes i Poy, Josep Maria
author_facet Paredes i Poy, Josep Maria
Ribó Gomis, Marc
Munar i Adrover, Pere
Moldón Vara, Francisco Javier
author_role author
author2 Ribó Gomis, Marc
Munar i Adrover, Pere
Moldón Vara, Francisco Javier
author2_role author
author
author
dc.subject.none.fl_str_mv Raigs gamma
Estels
Púlsars
Gamma rays
Stars
Pulsars
topic Raigs gamma
Estels
Púlsars
Gamma rays
Stars
Pulsars
description We use 73 h of stereoscopic data taken with the MAGIC telescopes to investigate the very high-energy (VHE) gamma-ray emission of the Crab pulsar. Our data show a highly significant pulsed signal in the energy range from 50 to 400 GeV in both the main pulse (P1) and the interpulse (P2) phase regions. We provide the widest spectra to date of the VHE components of both peaks, and these spectra extend to the energy range of satellite-borne observatories. The good resolution and background rejection of the stereoscopic MAGIC system allows us to cross-check the correctness of each spectral point of the pulsar by comparison with the corresponding (strong and well-known) Crab nebula flux. The spectra of both P1 and P2 are compatible with power laws with photon indices of 4.0 \pm 0.8 (P1) and 3.42 \pm 0.26 (P2), respectively, and the ratio P1/P2 between the photon counts of the two pulses is 0.54 \pm 0.12. The VHE emission can be understood as an additional component produced by the inverse Compton scattering of secondary and tertiary e\pm pairs on IR-UV photons.
publishDate 2012
dc.date.none.fl_str_mv 2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/150959
url https://hdl.handle.net/2445/150959
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1051/0004-6361/201118166
Astronomy & Astrophysics, 2012, vol. 540, p. 69A
https://doi.org/10.1051/0004-6361/201118166
dc.rights.none.fl_str_mv (c) The European Southern Observatory (ESO), 2012
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The European Southern Observatory (ESO), 2012
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,228081

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