Periodic very high energy γ -Ray Emission from LS I +61◦303 observed with the Magic telescope

The MAGIC collaboration has recently reported the discovery of γ-ray emission from the binary system LS I +61°303 in the TeV energy region. Here we present new observational results on this source in the energy range between 300 GeV and 3 TeV. In total, 112 hr of data were taken between 2006 Septemb...

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Autores: Paredes i Poy, Josep Maria, Ribó Gomis, Marc, Bosch i Ramon, Valentí, MAGIC Collaboration
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2009
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/150811
Acceso en línea:https://hdl.handle.net/2445/150811
Access Level:acceso abierto
Palabra clave:Astronomia de raigs gamma
Raigs X
Gamma ray astronomy
X-rays
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spelling Periodic very high energy γ -Ray Emission from LS I +61◦303 observed with the Magic telescopeParedes i Poy, Josep MariaRibó Gomis, MarcBosch i Ramon, ValentíMAGIC CollaborationAstronomia de raigs gammaRaigs XGamma ray astronomyX-raysThe MAGIC collaboration has recently reported the discovery of γ-ray emission from the binary system LS I +61°303 in the TeV energy region. Here we present new observational results on this source in the energy range between 300 GeV and 3 TeV. In total, 112 hr of data were taken between 2006 September and December covering four orbital cycles of this object. This large amount of data allowed us to produce an integral flux light curve covering for the first time all orbital phases of LS I +61°303. In addition, we also obtained a differential energy spectrum for two orbital phase bins covering the phase range 0.5 < < 0.6 and 0.6 < < 0.7. The photon index in the two phase bins is consistent within the errors with an average index Γ = 2.6 ± 0.2stat ± 0.2sys. LS I +61°303 was found to be variable at TeV energies on timescales of days. These new MAGIC measurements allowed us to search for intranight variability of the very high energy emission; however, no evidence for flux variability on timescales down to 30 min was found. To test for possible periodic structures in the light curve, we apply the formalism developed by Lomb and Scargle to the LS I +61°303 data taken in 2005 and 2006. We found the LS I +61°303 data set to be periodic with a period of (26.8 ± 0.2) days (with a post-trial chance probability of 10-7), close to the orbital period.Institute of Physics (IOP)2020202020092020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion8 p.application/pdfhttps://hdl.handle.net/2445/150811Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1088/0004-637X/693/1/303Astrophysical Journal, 2009, vol. 693, num. 1, p. 303-310https://doi.org/10.1088/0004-637X/693/1/303(c) American Astronomical Society, 2009info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1508112026-05-29T05:05:01Z
dc.title.none.fl_str_mv Periodic very high energy γ -Ray Emission from LS I +61◦303 observed with the Magic telescope
title Periodic very high energy γ -Ray Emission from LS I +61◦303 observed with the Magic telescope
spellingShingle Periodic very high energy γ -Ray Emission from LS I +61◦303 observed with the Magic telescope
Paredes i Poy, Josep Maria
Astronomia de raigs gamma
Raigs X
Gamma ray astronomy
X-rays
title_short Periodic very high energy γ -Ray Emission from LS I +61◦303 observed with the Magic telescope
title_full Periodic very high energy γ -Ray Emission from LS I +61◦303 observed with the Magic telescope
title_fullStr Periodic very high energy γ -Ray Emission from LS I +61◦303 observed with the Magic telescope
title_full_unstemmed Periodic very high energy γ -Ray Emission from LS I +61◦303 observed with the Magic telescope
title_sort Periodic very high energy γ -Ray Emission from LS I +61◦303 observed with the Magic telescope
dc.creator.none.fl_str_mv Paredes i Poy, Josep Maria
Ribó Gomis, Marc
Bosch i Ramon, Valentí
MAGIC Collaboration
author Paredes i Poy, Josep Maria
author_facet Paredes i Poy, Josep Maria
Ribó Gomis, Marc
Bosch i Ramon, Valentí
MAGIC Collaboration
author_role author
author2 Ribó Gomis, Marc
Bosch i Ramon, Valentí
MAGIC Collaboration
author2_role author
author
author
dc.subject.none.fl_str_mv Astronomia de raigs gamma
Raigs X
Gamma ray astronomy
X-rays
topic Astronomia de raigs gamma
Raigs X
Gamma ray astronomy
X-rays
description The MAGIC collaboration has recently reported the discovery of γ-ray emission from the binary system LS I +61°303 in the TeV energy region. Here we present new observational results on this source in the energy range between 300 GeV and 3 TeV. In total, 112 hr of data were taken between 2006 September and December covering four orbital cycles of this object. This large amount of data allowed us to produce an integral flux light curve covering for the first time all orbital phases of LS I +61°303. In addition, we also obtained a differential energy spectrum for two orbital phase bins covering the phase range 0.5 < < 0.6 and 0.6 < < 0.7. The photon index in the two phase bins is consistent within the errors with an average index Γ = 2.6 ± 0.2stat ± 0.2sys. LS I +61°303 was found to be variable at TeV energies on timescales of days. These new MAGIC measurements allowed us to search for intranight variability of the very high energy emission; however, no evidence for flux variability on timescales down to 30 min was found. To test for possible periodic structures in the light curve, we apply the formalism developed by Lomb and Scargle to the LS I +61°303 data taken in 2005 and 2006. We found the LS I +61°303 data set to be periodic with a period of (26.8 ± 0.2) days (with a post-trial chance probability of 10-7), close to the orbital period.
publishDate 2009
dc.date.none.fl_str_mv 2009
2020
2020
2020
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/2445/150811
url https://hdl.handle.net/2445/150811
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/10.1088/0004-637X/693/1/303
Astrophysical Journal, 2009, vol. 693, num. 1, p. 303-310
https://doi.org/10.1088/0004-637X/693/1/303
dc.rights.none.fl_str_mv (c) American Astronomical Society, 2009
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Astronomical Society, 2009
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 8 p.
application/pdf
dc.publisher.none.fl_str_mv Institute of Physics (IOP)
publisher.none.fl_str_mv Institute of Physics (IOP)
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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