2026-07-06T10:36:11Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/245992024-09-05T17:35:58Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Antoranz Canales, Pedro author Barrio Uña, Juan Abel author Contreras González, José Luis author Fonseca González, María Victoria author López Moya, Marcos author Miranda Pantoja, José Miguel author Nievas Rosillo, Mireia author Satalecka, Konstanzja author Scapin, Valeria author 2016-07-01 The BL Lac object 1ES 1011+496 was discovered at Very High Energy (VHE, E>100GeV) γ-rays by MAGIC in spring 2007. Before that the source was little studied in different wavelengths. Therefore a multi-wavelength (MWL) campaign was organized in spring 2008. Along MAGIC, the MWL campaign included the Mets¨ahovi radio observatory, Bell and KVA optical telescopes and the Swift and AGILE satellites. MAGIC observations span from March to May, 2008 for a total of 27.9 hours, of which 19.4 hours remained after quality cuts. The light curve showed no significant variability yielding an integral flux above 200 GeV of (1.3 ± 0.3) × 10^(−11) photons cm^(−2) s^( −1) . The differential VHE spectrum could be described with a power-law function with a spectral index of 3.3 ± 0.4. Both results were similar to those obtained during the discovery. Swift XRT observations revealed an X-ray flare, characterized by a harder-when-brighter trend, as is typical for high synchrotron peak BL Lac objects (HBL). Strong optical variability was found during the campaign, but no conclusion on the connection between the optical and VHE γ-ray bands could be drawn. The contemporaneous SED shows a synchrotron dominated source, unlike concluded in previous work based on non-simultaneous data, and is well described by a standard one–zone synchrotron self–Compton model. We also performed a study on the source classification. While the optical and X-ray data taken during our campaign show typical characteristics of an HBL, we suggest, based on archival data, that 1ES 1011+496 is actually a borderline case between intermediate and high synchrotron peak frequency BL Lac objects. 0035-8711 10.1093/mnras/stw710 https://hdl.handle.net/20.500.14352/24599 http://dx.doi.org/10.1093/mnras/stw710 http://mnras.oxfordjournals.org/ http://arxiv.org/abs/1603.07308 Multiwavelength observations of the blazar 1ES 1011+496 in Spring 2008