Antoranz Canales, PedroBarrio Uña, Juan AbelContreras González, José LuisFonseca González, María VictoriaLópez Moya, MarcosMiranda Pantoja, José MiguelNieto Castaño, Daniel2023-06-202023-06-202008-06-010004-637X10.1086/586731https://hdl.handle.net/20.500.14352/50833© The American Astronomical Society. We thank Neil Gehrels and the whole Swift team for the ToO observations and the Suzaku team for their assistance in the analysis of our Suzaku data.We thank the IAC for the excellent working conditions at the ORM. We acknowledge financial support from the ASI-INAF contract I /088/06/0. TheMAGIC project is supported by the German BMBF and MPG, the Italian INFN, the Spanish CICYT, the Swiss ETH Research Grant TH34/04, and the Polish MNiI Grant 1P03D01028.We present the results from a multiwavelength campaign on the TeV blazar 1ES 1959+650, performed in 2006 May. Data from the optical, UV, soft- and hard-X-ray, and very high energy (VHE) gamma-ray ( E > 100 GeV) bands were obtained with the Suzaku and Swift satellites, the MAGIC telescope, and other ground-based facilities. The source spectral energy distribution (SED), derived from Suzaku and MAGIC observations at the end of 2006 May, shows the usual double hump shape, with the synchrotron peak at a higher flux level than the Compton peak. With respect to historical values, during our campaign the source exhibited a relatively high state in X-rays and optical, while in the VHE band it was at one of the lowest level so far recorded. We also monitored the source for flux spectral variability on a time window of 10 days in the optical-UVand X-ray bands and 7 days in the VHE band. The source varies more in the X-ray than in the optical band, with the 2-10 keV X-ray flux varying by a factor of similar to 2. The synchrotron peak is located in the X-ray band and moves to higher energies as the source gets brighter, with the X-ray fluxes above it varying more rapidly than the X-ray fluxes at lower energies. The variability behavior observed in the X-ray band cannot be produced by emitting regions varying independently and suggests instead some sort of "standing shock'' scenario. The overall SED is well represented by a homogeneous one-zone synchrotron inverse Compton emission model, from which we derive physical parameters that are typical of high-energy peaked blazars.engjournal articlehttp://dx.doi.org/10.1086/586731http://iopscience.iop.orghttp://arxiv.org/abs/0801.4029open access537539.1BL-Lacertae ObjectsEinstein Slew SurveyGamma-Ray EmissionRadio-Loud QuasarsBand X-RayXMM-NewtonBepposax ObservationsInternal ShocksBoard SuzakuPKS 2155-304.Electrónica (Física)ElectricidadFísica nuclear2202.03 Electricidad2207 Física Atómica y Nuclear