VILLATA, MassimoMassimoVILLATARAITERI, Claudia MariaClaudia MariaRAITERILarionov, V. M.V. M.LarionovKurtanidze, O. M.O. M.KurtanidzeNilsson, K.K.NilssonAller, M. F.M. F.AllerTornikoski, M.M.TornikoskiVolvach, A.A.VolvachAller, H. D.H. D.AllerArkharov, A. A.A. A.ArkharovBach, U.U.BachBeltrame, P.P.BeltrameBhatta, G.G.BhattaBUEMI, CARLA SIMONACARLA SIMONABUEMIBöttcher, M.M.BöttcherCalcidese, P.P.CalcideseCarosati, D.D.CarosatiCastro-Tirado, A. J.A. J.Castro-Tiradoda Rio, D.D.da RioDI PAOLA, AndreaAndreaDI PAOLADOLCI, MauroMauroDOLCIForné, E.E.FornéFRASCA, AntonioAntonioFRASCAHagen-Thorn, V. A.V. A.Hagen-ThornHeidt, J.J.HeidtHiriart, D.D.HiriartJelínek, M.M.JelínekKimeridze, G. N.G. N.KimeridzeKonstantinova, T. S.T. S.KonstantinovaKopatskaya, E. N.E. N.KopatskayaLANTERI, LucianoLucianoLANTERILETO, PAOLOPAOLOLETOLigustri, R.R.LigustriLindfors, E.E.LindforsLähteenmäki, A.A.LähteenmäkiMarilli, E.E.MarilliNieppola, E.E.NieppolaNikolashvili, M. G.M. G.NikolashviliPasanen, M.M.PasanenRagozzine, B.B.RagozzineRos, J. A.J. A.RosSigua, L. A.L. A.SiguaSMART, Richard LaurenceRichard LaurenceSMARTSorcia, M.M.SorciaTakalo, L. O.L. O.TakaloTAVANI, MarcoMarcoTAVANITRIGILIO, CORRADOCORRADOTRIGILIOTurchetti, R.R.TurchettiUckert, K.K.UckertUMANA, Grazia Maria GloriaGrazia Maria GloriaUMANAVERCELLONE, STEFANOSTEFANOVERCELLONEWebb, J. R.J. R.Webb2023-01-242023-01-2420080004-6361http://hdl.handle.net/20.500.12386/33042Aims: Since the CGRO operation in 1991-2000, one of the primary unresolved questions about the blazar γ-ray emission has been its possible correlation with the low-energy (in particular optical) emission. To help answer this problem, the Whole Earth Blazar Telescope (WEBT) consortium has organized the GLAST-AGILE Support Program (GASP) to provide the optical-to-radio monitoring data to be compared with the γ-ray detections by the AGILE and GLAST satellites. This new WEBT project started in early September 2007, just before a strong γ-ray detection of <ASTROBJ>0716+714</ASTROBJ> by AGILE. <BR />Methods: We present the GASP-WEBT optical and radio light curves of this blazar obtained in July-November 2007, about various AGILE pointings at the source. We construct NIR-to-UV spectral energy distributions (SEDs), by assembling GASP-WEBT data together with UV data from the Swift ToO observations of late October. <BR />Results: We observe a contemporaneous optical-radio outburst, which is a rare and interesting phenomenon in blazars. The shape of the SEDs during the outburst appears peculiarly wavy because of an optical excess and a UV drop-and-rise. The optical light curve is well sampled during the AGILE pointings, showing prominent and sharp flares. A future cross-correlation analysis of the optical and AGILE data will shed light on the expected relationship between these flares and the γ-ray events.The radio-to-optical datapresented in this paper are stored in the WEBT archive; for questions regarding their availability,please contact the WEBT President Massimo Villata.STAMPAenArticle10.1051/0004-6361:2008095522-s2.0-41449111230https://www.aanda.org/articles/aa/abs/2008/14/aa09552-08/aa09552-08.html2008A&A...481L..79VFIS/05 - ASTRONOMIA E ASTROFISICA