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MAGIC constraints on gamma-ray emission from Cygnus X-3

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dc.contributor.authorAntoranz Canales, Pedro
dc.contributor.authorBarrio Uña, Juan Abel
dc.contributor.authorContreras González, José Luis
dc.contributor.authorFonseca González, María Victoria
dc.contributor.authorMiranda Pantoja, José Miguel
dc.contributor.authorNieto Castaño, Daniel
dc.date.accessioned2023-06-20T03:34:24Z
dc.date.available2023-06-20T03:34:24Z
dc.date.issued2010-09-20
dc.description© The American Astronomical Society. Supported by INFN Padova.We thank the Instituto de Astrofisica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The support of the German BMBF and MPG, the Italian INFN, the Swiss National Fund SNF, and the Spanish MICINN are gratefully acknowledged. This work was also supported by the Polish MNiSzW Grant N N203 390834, by the YIP of the Helmholtz Gemeinschaft, and by grant DO02-353 of the Bulgarian National Science Fund. S. T. is grateful for the support of the RATAN observations and the Russian Foundation for Basic Research, grant N08-02-00504-a.
dc.description.abstractCygnus X-3 is a microquasar consisting of an accreting compact object orbiting around a Wolf-Rayet star. It has been detected at radio frequencies and up to high-energy. rays (above 100 MeV). However, many models also predict a very high energy (VHE) emission (above hundreds of GeV) when the source displays relativistic persistent jets or transient ejections. Therefore, detecting such emission would improve the understanding of the jet physics. The imaging atmospheric Cherenkov telescope MAGIC observed Cygnus X-3 for about 70 hr between 2006 March and 2009 August in different X-ray/radio spectral states and also during a period of enhanced gamma-ray emission. MAGIC found no evidence for a VHE signal from the direction of the microquasar. An upper limit to the integral flux for energies higher than 250 GeV has been set to 2.2 x 10(-12) photons cm(-2) s(-1) (95% confidence level). This is the best limit so far to the VHE emission from this source. The non-detection of a VHE signal during the period of activity in the high-energy band sheds light on the location of the possible VHE radiation favoring the emission from the innermost region of the jets, where absorption is significant. The current and future generations of Cherenkov telescopes may detect a signal under precise spectral conditions.
dc.description.departmentDepto. de Estructura de la Materia, Física Térmica y Electrónica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipINFN Padova
dc.description.sponsorshipGerman BMBF
dc.description.sponsorshipGerman MPG
dc.description.sponsorshipItalian INFN
dc.description.sponsorshipSwiss National Fund SNF
dc.description.sponsorshipPolish MNiSzW
dc.description.sponsorshipYIP of the Helmholtz Gemeinschaft
dc.description.sponsorshipBulgarian National Science Fund
dc.description.sponsorshipRATAN observations
dc.description.sponsorshipRussian Foundation for Basic Research
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/22218
dc.identifier.doi10.1088/0004-637X/721/1/843
dc.identifier.issn0004-637X
dc.identifier.officialurlhttp://dx.doi.org/10.1088/0004-637X/721/1/843
dc.identifier.relatedurlhttp://iopscience.iop.org
dc.identifier.relatedurlhttp://arxiv.org/abs/1005.0740
dc.identifier.urihttps://hdl.handle.net/20.500.14352/43916
dc.issue.number1
dc.journal.titleAstrophysical journal
dc.language.isoeng
dc.page.final855
dc.page.initial843
dc.publisherIOP Publishing
dc.relation.projectIDN N203 390834
dc.relation.projectIDDO02-353
dc.relation.projectIDN08-02-00504-a
dc.rights.accessRightsopen access
dc.subject.cdu537
dc.subject.cdu539.1
dc.subject.keywordHigh-Energy Emission
dc.subject.keywordMicroquasar GRS 1915+105
dc.subject.keywordX-Ray
dc.subject.keywordRalativistic JET
dc.subject.keywordCYG X-3
dc.subject.keywordRadio Outburst
dc.subject.keywordCrab-Nebula
dc.subject.keywordBinary
dc.subject.keywordTelescope
dc.subject.keywordPulsar.
dc.subject.ucmElectrónica (Física)
dc.subject.ucmElectricidad
dc.subject.ucmFísica nuclear
dc.subject.unesco2202.03 Electricidad
dc.subject.unesco2207 Física Atómica y Nuclear
dc.titleMAGIC constraints on gamma-ray emission from Cygnus X-3
dc.typejournal article
dc.volume.number721
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