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http://hdl.handle.net/20.500.12386/33049
Titolo: | Multi-frequency monitoring of γ-ray loud blazars I. Light curves and spectral energy distributions | Autori: | Bach, U. RAITERI, Claudia Maria VILLATA, Massimo Fuhrmann, L. BUEMI, CARLA SIMONA Larionov, V.M. LETO, PAOLO Arkharov, G.A.A. Coloma, J.M. DI PAOLA, Andrea DOLCI, Mauro Efimova, N. Forné, E. Ibrahimov, M.A. Hagen-Thorn, V. Konstantinova, T. Kopatskaya, E. LANTERI, Luciano Kurtanidze, O.M. MACCAFERRI, Giuseppe Nikolashvili, M.G. ORLATI, ANDREA Ros, J.A. Tosti, G. TRIGILIO, CORRADO UMANA, Grazia Maria Gloria |
Data pubblicazione: | 2007 | Rivista: | ASTRONOMY & ASTROPHYSICS | Numero: | 464 | Fascicolo: | 1 | Da pagina:: | 175 | Abstract: | Context: Being dominated by non-thermal emission from aligned relativistic jets, blazars allow us to elucidate the physics of extragalactic jets, and, ltimately, how the energy is extracted from the central black hole in radio-loud active galactic nuclei. Aims: Crucial information is provided by broad-band spectral energy distributions (SEDs), their trends with luminosity and correlated multi-frequency variability. With this study we plan to obtain a database of contemporaneous radio-to-optical spectra of a sample of blazars, which are and will be observed by current and future high-energy satellites. Methods: Since December 2004 we are performing a monthly multi-frequency radio monitoring of a sample of 35 blazars at the antennas in Medicina and Noto. Contemporaneous near-IR and optical observations for all our observing epochs are organised. Results: Until June 2006 about 4000 radio measurements and 5500 near-IR and optical measurements were obtained. Most of the sources show significant variability in all observing bands. Here we present the multi-frequency data acquired during the first eighteen months of the project, and construct the SEDs for the best-sampled sources. | URI: | http://hdl.handle.net/20.500.12386/33049 | URL: | https://www.aanda.org/articles/aa/abs/2007/10/aa6561-06/aa6561-06.html http://www.scopus.com/inward/record.url?eid=2-s2.0-33947186164&partnerID=MN8TOARS |
ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361:20066561 | Bibcode ADS: | 2007A&A...464..175B | Fulltext: | open |
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