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Simultaneous multiwavelength observations of markarian 421 during outburst
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We 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.
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MAGIC Collaboration, PAREDES I POY, Josep maria, RIBÓ GOMIS, Marc, BOSCH I RAMON, Valentí. Simultaneous multiwavelength observations of markarian 421 during outburst. _Astrophysical Journal_. 2009. Vol. 703, núm. 1, pàgs. 169-178. [consulta: 23 de gener de 2026]. ISSN: 0004-637X. [Disponible a: https://hdl.handle.net/2445/150146]