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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Multifrequency monitoring of the blazar 0716+714 during the GASP-WEBT-AGILE campaign of 2007
Astronomy and Astrophysics, Volume 481, No. 2, Year 2008
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Description
Aims. Since the CGRO operation in 1991-2000, one of the primary unresolved questions about the blazar -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 -ray detections by the AGILE and GLAST satellites. This new WEBT project started in early September 2007, just before a strong -ray detection of 0716+714 by AGILE.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.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 -ray events. © 2008 ESO.
Authors & Co-Authors
Villata, Massimo
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Raiteri, Claudia M.
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Larionov, Valeri M.
Russian Federation, Saint Petersburg
Saint Petersburg State University
Russian Federation, Saint Petersburg
Pulkovo Observatory of the Russian Academy of Sciences
Kurtanidze, Omar M.
Georgia, Abastumani
Abastumani Astrophysical Observatory
Germany, Potsdam
Leibniz Institute for Astrophysics Potsdam
Germany, Heidelberg
Landessternwarte Heidelberg
Nilsson, Kari
Finland, Turku
Turun Yliopisto
Aller, M. F.
United States, Ann Arbor
University of Michigan, Ann Arbor
Tornikoski, Merja
Finland, Espoo
Aalto University
Volvach, A. E.
Ukraine, Bakhchysarai
Crimean Astrophysical Observatory Ras
Aller, Hugh D.
United States, Ann Arbor
University of Michigan, Ann Arbor
Arkharov, Arkady A.H.
Russian Federation, Saint Petersburg
Pulkovo Observatory of the Russian Academy of Sciences
Bach, Uwe
Germany, Bonn
Max Planck Institute for Radio Astronomy
Bhatta, Gopal
United States, Miami
Florida International University
Buemi, Carla S.
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Boettcher, M.
United States, Athens
Ohio University
Calcidese, Paolo
Unknown Affiliation
Carosati, Daniele
Italy
Armenzano Astronomical Observatory
Castro-Tirado, A. J.
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Di Paola, Andrea
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Forné, E.
Unknown Affiliation
Frasca, Antonio
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Heidt, Jochen
Germany, Heidelberg
Landessternwarte Heidelberg
Hiriart, David
Mexico, Mexico
Universidad Nacional Autónoma de México
Jelínek, Martin
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Kimeridze, Givi N.
Georgia, Abastumani
Abastumani Astrophysical Observatory
Grishina, Tatiana S.
Russian Federation, Saint Petersburg
Saint Petersburg State University
Kopatskaya, Evgenia N.
Russian Federation, Saint Petersburg
Saint Petersburg State University
Lanteri, Luciano
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Leto, Paolo
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Ligustri, Rolando
Unknown Affiliation
Lindfors, Elina J.
Finland, Turku
Turun Yliopisto
L¨ahteenm¨aki, Anne A.
Finland, Espoo
Aalto University
Nieppola, Elina
Finland, Espoo
Aalto University
Nikolashvili, M. G.
Georgia, Abastumani
Abastumani Astrophysical Observatory
Pasanen, Mikko
Finland, Turku
Turun Yliopisto
Ros, J. A.
Unknown Affiliation
Sigua, Lorand A.
Georgia, Abastumani
Abastumani Astrophysical Observatory
Smart, Richard L.
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Takalo, Leo O.
Finland, Turku
Turun Yliopisto
Tavani, Marco
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Trigilio, Corrado
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Umana, Grazia
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Vercellone, Stefano
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Webb, James R.
United States, Miami
Florida International University
Statistics
Citations: 114
Authors: 43
Affiliations: 16
Identifiers
Doi:
10.1051/0004-6361:200809552
ISSN:
14320746
Research Areas
Environmental
Study Approach
Quantitative