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Discovery of VHE gamma-ray emission from the BL Lacertae object B3 2247+381 with the MAGIC telescopes

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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.authorScapin, Valeria
dc.date.accessioned2023-06-20T03:32:41Z
dc.date.available2023-06-20T03:32:41Z
dc.date.issued2012-03
dc.description© ESO 2012. We would like to 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 is gratefully acknowledged. This work was also supported by the Marie Curie program, by the CPAN CSD2007-00042 and MultiDark CSD2009-00064 projects of the Spanish Consolider-Ingenio 2010 programme, by grant DO02-353 of the Bulgarian NSF, by grant 127740 of the Academy of Finland, by the YIP of the Helmholtz Gemeinschaft, by the DFG Cluster of Excellence "Origin and Structure of the Universe", and by the Polish MNiSzW Grant N N203 390834. The Fermi-LAT Collaboration acknowledges support from a number of agencies and institutes for both development and the operation of the LAT as well as scientific data analysis. These include NASA and DOE in the United States, CEA/Irfu and IN2P3/CNRS in France, ASI and INFN in Italy, MEXT, KEK, and JAXA in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council and the National Space Board in Sweden. Additional support from INAF in Italy and CNES in France for science analysis during the operations phase is also gratefully acknowledged. We gratefully acknowledge N. Gehrels for approving this set of ToOs and the entire Swift team, the duty scientists and science planners for the dedicated support, making these observations possible.
dc.description.abstractWe study the non-thermal jet emission of the BL Lac object B3 2247+381 during a high optical state. Methods. The MAGIC telescopes observed the source during 13 nights between September 30th and October 30th 2010, collecting a total of 14.2 h of good quality very high energy (VHE) gamma-ray data. Simultaneous multiwavelength data was obtained with X-ray observations by the Swift satellite and optical R-band observations at the KVA-telescope. We also use high energy gamma-ray (HE, 0.1-100GeV) data from the Fermi satellite. Results. The BL Lac object B3 2247+381 (z = 0.119) was detected, for the first time, at VHE gamma-rays at a statistical significance of 5.6 sigma. A soft VHE spectrum with a photon index of -3.2 +/- 0.6 was determined. No significant short term flux variations were found. We model the spectral energy distribution using a one-zone SSC-model, which can successfully describe our data.
dc.description.departmentDepto. de Estructura de la Materia, Física Térmica y Electrónica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipGerman MPG
dc.description.sponsorshipSwiss National Fund SNF
dc.description.sponsorshipItalian INFN
dc.description.sponsorshipSpanish MICINN
dc.description.sponsorshipMarie Curie program
dc.description.sponsorshipCPAN
dc.description.sponsorshipMultiDark project of the Spanish Consolider-Ingenio programme
dc.description.sponsorshipBulgarian NSF
dc.description.sponsorshipAcademy of Finland
dc.description.sponsorshipYIP of the Helmholtz Gemeinschaft
dc.description.sponsorshipDFG
dc.description.sponsorshipPolish MNiSzW
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/21332
dc.identifier.doi10.1051/0004-6361/201117967
dc.identifier.issn0004-6361
dc.identifier.relatedurlhttp://arxiv.org/abs/1201.2634
dc.identifier.urihttps://hdl.handle.net/20.500.14352/43812
dc.journal.titleAstronomy & Astrophysics
dc.language.isoeng
dc.publisherEDP Sciencies
dc.relation.projectIDCSD2007-00042
dc.relation.projectIDCSD2009-00064
dc.relation.projectIDDO02-353
dc.relation.projectID127740
dc.relation.projectIDN N203 390834
dc.rights.accessRightsopen access
dc.subject.cdu537
dc.subject.keywordExtragalactic Background Light
dc.subject.keywordLarge-Area Telescope
dc.subject.keywordMission
dc.subject.keywordBepposax
dc.subject.keywordSpectra
dc.subject.keywordCatalog
dc.subject.keywordBlazars
dc.subject.keywordNuclei
dc.subject.keywordSample
dc.subject.keywordQuasar.
dc.subject.ucmElectrónica (Física)
dc.subject.ucmElectricidad
dc.subject.unesco2202.03 Electricidad
dc.titleDiscovery of VHE gamma-ray emission from the BL Lacertae object B3 2247+381 with the MAGIC telescopes
dc.typejournal article
dc.volume.number539
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