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Simultaneous multiwavelength observations of Markarian 421 during outburst

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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.accessioned2023-06-20T03:35:00Z
dc.date.available2023-06-20T03:35:00Z
dc.date.issued2009-09
dc.description© The American Astronomical Society. The VERITAS research was supported by grants from the U.S. Department of Energy, the U.S. National Science Foundation and the Smithsonian Institution, by NSERC in Canada, by Science Foundation Ireland, and by STFC in the U.K. We acknowledge the excellent work of the technical support staff at the FLWO and the collaborating institutions in the construction and operation of the instrument. D. G. and W. C. wish to acknowledge support by NASA through grants NNX06AB96G, NNX08AD76G, and NNX08AX53G. The MAGIC Collaboration thanks 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, and Spanish MCINN is gratefully acknowledged. This work was also supported by ETH Research Grant TH 34/043, by the Polish MNiSzW Grant N N203 390834, and by the YIP of the Helmholtz Gemeinschaft. Facilities: MAGIC, VERITAS, FLWO:10m, XMM
dc.description.abstractWe report on the results of two coordinated multiwavelength campaigns that focused on the blazar Markarian 421 during its 2006 and 2008 outbursts. These campaigns obtained UV and X-ray data using the XMM-Newton satellite, while the gamma-ray data were obtained utilizing three imaging atmospheric Cerenkov telescopes, the Whipple 10 m telescope and VERITAS, both based in Arizona, as well as the MAGIC telescope, based on La Palma in the Canary Islands. The coordinated effort between the gamma-ray groups allowed for truly simultaneous data in UV/X-ray/gamma-ray wavelengths during a significant portion of the XMM-Newton observations. This simultaneous coverage allowed for a reliable search for correlations between UV, X-ray, and gamma-ray variability over the course of the observations. Investigations of spectral hysteresis and modeling of the spectral energy distributions are also presented.
dc.description.departmentDepto. de Estructura de la Materia, Física Térmica y Electrónica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipU.S. Department of Energy
dc.description.sponsorshipU.S. National Science Foundation
dc.description.sponsorshipSmithsonian Institution
dc.description.sponsorshipNSERC in Canada
dc.description.sponsorshipScience Foundation Ireland
dc.description.sponsorshipSTFC, U.K
dc.description.sponsorshipNASA
dc.description.sponsorshipETH
dc.description.sponsorshipPolish MNiSzW
dc.description.sponsorshipHelmholtz Gemeinschaft
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/22716
dc.identifier.doi10.1088/0004-637X/703/1/169
dc.identifier.issn0004-637X
dc.identifier.officialurlhttp://dx.doi.org/10.1088/0004-637X/703/1/169
dc.identifier.relatedurlhttp://iopscience.iop.org
dc.identifier.urihttps://hdl.handle.net/20.500.14352/43954
dc.issue.number1
dc.journal.titleAstrophysical journal
dc.language.isoeng
dc.page.final178
dc.page.initial169
dc.publisherIOP Publishing
dc.relation.projectIDNNX06AB96G
dc.relation.projectIDNNX08AD76G
dc.relation.projectIDNNX08AX53G
dc.relation.projectIDTH 34/043
dc.relation.projectIDN N203 390834
dc.rights.accessRightsopen access
dc.subject.cdu537
dc.subject.cdu539.1
dc.subject.keywordActive Galaxy Markarian-421
dc.subject.keywordRay Spectral Variability
dc.subject.keywordXMM-Newton
dc.subject.keywordCorrelated Variability
dc.subject.keywordMagic Telescope
dc.subject.keywordGalactic Nuclei
dc.subject.keywordTEV Photons
dc.subject.keywordGamma-Rays
dc.subject.keywordEnergy
dc.subject.keywordRadiation.
dc.subject.ucmElectrónica (Física)
dc.subject.ucmElectricidad
dc.subject.ucmFísica nuclear
dc.subject.unesco2202.03 Electricidad
dc.subject.unesco2207 Física Atómica y Nuclear
dc.titleSimultaneous multiwavelength observations of Markarian 421 during outburst
dc.typejournal article
dc.volume.number703
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