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Discovery of very high energy gamma rays from 1ES 1218+30.4

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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.accessioned2023-06-20T10:39:46Z
dc.date.available2023-06-20T10:39:46Z
dc.date.issued2006-05-10
dc.description© The American Astronomical Society. We would like to thank the Instituto de Astrofísica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The support of the German Bundesministerium für Bildung und Forschung and Max-Planck-Gesellschaft, the Italian Istituto Nazionale de Fisica Nucleare, and the Spanish Comisión Interministerial de Ciencias y Tecnología is gratefully acknowledged. This work was also supported by ETH Research Grant TH 34/04 3 and grant 1P03D01028 from the Polish Ministerstwo Nauki i Informatyzacji.
dc.description.abstractThe MAGIC collaboration has studied the high-frequency-peaked BL Lac object 1ES 1218 + 30.4, at a redshift z = 0.182, using the MAGIC imaging air Cerenkov telescope located on the Canary Island of La Palma. A gamma-ray signal was observed with 6.4 sigma significance. The differential energy spectrum for an energy threshold of 120 GeV can be fitted by a simple power law, yielding F-E = (8.1 +/- 2.1) x 10(-7)[E/(250 GeV)](-3.0 +/- 0.4) TeV-1 F (E) m(-2) s(-1). During the 6 days of observation in 2005 January, no time variability on timescales of days was found within the statistical errors. The observed integral flux above 350 GeV is nearly a factor of 2 below the upper limit reported by the Whipple collaboration in 2003.
dc.description.departmentDepto. de Estructura de la Materia, Física Térmica y Electrónica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipGerman Bundesministerium für Bildung und Forschung
dc.description.sponsorshipMax-Planck-Gesellschaft
dc.description.sponsorshipItalian Istituto Nazionale de Fisica Nucleare
dc.description.sponsorshipSpanish Comisión Interministerial de Ciencias y Tecnología
dc.description.sponsorshipETH
dc.description.sponsorshipPolish Ministerstwo Nauki i Informatyzacji
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/24226
dc.identifier.doi10.1086/504845
dc.identifier.issn0004-637X
dc.identifier.officialurlhttp://dx.doi.org/10.1086/504845
dc.identifier.relatedurlhttp://iopscience.iop.org
dc.identifier.relatedurlhttp://arxiv.org/abs/astro-ph/0603529
dc.identifier.urihttps://hdl.handle.net/20.500.14352/50933
dc.issue.number2 (Par
dc.journal.titleAstrophysical journal
dc.language.isoeng
dc.page.finalL122
dc.page.initialL119
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.keywordBL-Lacertae Objects
dc.subject.keywordTelescope
dc.subject.keywordCatalog
dc.subject.keywordBlazar.
dc.subject.ucmElectrónica (Física)
dc.subject.ucmElectricidad
dc.subject.ucmFísica nuclear
dc.subject.unesco2202.03 Electricidad
dc.subject.unesco2207 Física Atómica y Nuclear
dc.titleDiscovery of very high energy gamma rays from 1ES 1218+30.4
dc.typejournal article
dc.volume.number642
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