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Observation of very high energy gamma-rays from the AGN 1ES 2344+514 in low emission state with the magic telescope

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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.authorLópez Moya, Marcos
dc.contributor.authorMiranda Pantoja, José Miguel
dc.date.accessioned2023-06-20T10:39:19Z
dc.date.available2023-06-20T10:39:19Z
dc.date.issued2007-06-20
dc.description© The American Astronomical Society. We thank the IAC 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 and the Spanish CICYT is gratefully acknowledged. This work was also supported by ETH Research Grant TH 34/04 3 and the Polish MNiI Grant 1P03D01028.
dc.description.abstractThe MAGIC collaboration has observed very high energy gamma-ray emission from the AGN 1ES 2344+514. A gamma-ray signal corresponding to an 11 sigma excess and an integral flux of ( 2.38 +/- 0.30(stat) +/- 0.70(syst)) x 10(-11) cm(-2) s(-1) above 200 GeV has been obtained from 23.1 hr of data taking between 2005 August 3 and 2006 January 1. The data confirm the previously detected gamma-ray emission from this object during a flare seen by the Whipple collaboration in 1995 and the evidence ( below 5 sigma significance level) from long-term observations conducted by the Whipple and HEGRA groups. The MAGIC observations show a relatively steep differential photon spectrum that can be described by a power law with a photon index of alpha = -2.95 +/- 0.12(stat) +/- 0.2(syst) between 140 GeV and 5.4 TeV. The observations reveal a low-flux state, about 6 times below the 1995 flare seen by Whipple and comparable with the previous Whipple and HEGRA long-term measurements. During the MAGIC observations no significant time variability was observed.
dc.description.departmentDepto. de Estructura de la Materia, Física Térmica y Electrónica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipGerman BMBF
dc.description.sponsorshipGerman MPG
dc.description.sponsorshipItalian INFN
dc.description.sponsorshipSpanish CICYT
dc.description.sponsorshipETH
dc.description.sponsorshipPolish MNiI
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/23841
dc.identifier.doi10.1086/518431
dc.identifier.issn0004-637X
dc.identifier.officialurlhttp://dx.doi.org/10.1086/518431
dc.identifier.relatedurlhttp://iopscience.iop.org
dc.identifier.relatedurlhttp://arxiv.org/abs/astro-ph/0612383
dc.identifier.urihttps://hdl.handle.net/20.500.14352/50912
dc.issue.number2 (Par
dc.journal.titleAstrophysical journal
dc.language.isoeng
dc.page.final899
dc.page.initial892
dc.publisherIOP Publishing
dc.relation.projectIDTH 34/04 3
dc.relation.projectID1P03D01028
dc.rights.accessRightsopen access
dc.subject.cdu537
dc.subject.cdu539.1
dc.subject.keywordActive Galactic Nuclei
dc.subject.keywordEinstein Slew Survey
dc.subject.keywordBL-Lacertae Objects
dc.subject.keywordMultiwavelength Observations
dc.subject.keywordCherenkov Telescopes
dc.subject.keywordLAC Objects
dc.subject.keywordSpectra
dc.subject.keywordDiscovery
dc.subject.keywordRadiation
dc.subject.keywordUniverse.
dc.subject.ucmElectrónica (Física)
dc.subject.ucmElectricidad
dc.subject.ucmFísica nuclear
dc.subject.unesco2202.03 Electricidad
dc.subject.unesco2207 Física Atómica y Nuclear
dc.titleObservation of very high energy gamma-rays from the AGN 1ES 2344+514 in low emission state with the magic telescope
dc.typejournal article
dc.volume.number662
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