Multi-frequency monitoring of γ-ray loud blazars I.: Light curves and spectral energy distributions

被引:37
作者
Bach, U.
Raiteri, C. M.
Villata, M.
Fuhrmann, L.
Buemi, C. S.
Larionov, V. M.
Leto, P.
Arkharov, G. A. A.
Coloma, J. M.
Di Paola, A.
Dolci, M.
Efimova, N.
Forne, E.
Ibrahimov, M. A.
Hagen-Thorn, V.
Konstantinova, T.
Kopatskaya, E.
Lanteri, L.
Kurtanidze, O. M.
Maccaferri, G.
Nikolashvili, M. G.
Orlati, A.
Ros, J. A.
Tosti, G.
Trigilio, C.
Umana, G.
机构
[1] Osserv Astron Torino, INAF, I-10025 Pino Torinese, TO, Italy
[2] Univ Perugia, Osservatorio Astron, I-06126 Perugia, Italy
[3] Osserv Astrofis Catania, INAF, I-95123 Catania, Italy
[4] St Petersburg State Univ, Astron Inst, St Petersburg 198504, Russia
[5] INAF, Ist Radioastron, Sez Noto, I-96017 Noto, Italy
[6] Russian Acad Sci, Pulkovo Astron Observ, Moscow 117901, Russia
[7] Agrupacio Astron Sabadell, Sabadell 08200, Spain
[8] Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, Italy
[9] Osservatorio Astron Collurania, INAF, I-64100 Teramo, Italy
[10] Ulugh Beg Astron Inst, Tashkent 700052, Uzbekistan
[11] Abastumani Astrophys Observ, GE-383762 Abastumani, Georgia
[12] INAF, Ist Radioastron, Sez Med, I-40059 Medicina, Italy
来源
ASTRONOMY & ASTROPHYSICS | 2007年 / 464卷 / 01期
关键词
galaxies : active; galaxies : BL Lacertae objects : general; galaxies : jets; galaxies : quasars : general;
D O I
10.1051/0004-6361:20066561
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Context. Being dominated by non-thermal emission from aligned relativistic jets, blazars allow us to elucidate the physics of extragalactic jets, and, ultimately, 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.
引用
收藏
页码:175 / 186
页数:12
相关论文
共 100 条
[1]  
AGUDO I, 2006, UNPUB A A
[2]   POLARIZED RADIO OUTBURSTS IN BL LACERTAE .1. POLARIZED EMISSION FROM A COMPACT JET [J].
ALLER, HD ;
ALLER, MF ;
HUGHES, PA .
ASTROPHYSICAL JOURNAL, 1985, 298 (01) :296-300
[3]  
ALLER HD, 2003, AM ASTRON SOC M, V202
[4]  
BAARS JWM, 1977, ASTRON ASTROPHYS, V61, P99
[5]   Structure and flux variability in the VLBI jet of BL Lacertae during the WEBT campaigns (1995-2004) [J].
Bach, U. ;
Villata, M. ;
Raiteri, C. M. ;
Agudo, I. ;
Aller, H. D. ;
Aller, M. F. ;
Denn, G. ;
Gomez, J. L. ;
Jorstad, S. ;
Marscher, A. ;
Mutel, R. L. ;
Terasranta, H. .
ASTRONOMY & ASTROPHYSICS, 2006, 456 (01) :105-U26
[6]   Space-VLBI polarimetry of the BL Lacertae object S5 0716+714: rapid polarization variability in the VLBI core [J].
Bach, U ;
Krichbaum, TP ;
Kraus, A ;
Witzel, A ;
Zensus, JA .
ASTRONOMY & ASTROPHYSICS, 2006, 452 (01) :83-95
[7]   Kinematic study of the blazar S5 0716+714 [J].
Bach, U ;
Krichbaum, TP ;
Ros, E ;
Britzen, S ;
Tian, WW ;
Kraus, A ;
Witzel, A ;
Zensus, JA .
ASTRONOMY & ASTROPHYSICS, 2005, 433 (03) :815-825
[8]   MASSIVE BLACK-HOLE BINARIES IN ACTIVE GALACTIC NUCLEI [J].
BEGELMAN, MC ;
BLANDFORD, RD ;
REES, MJ .
NATURE, 1980, 287 (5780) :307-309
[9]  
Bessell MS, 1998, ASTRON ASTROPHYS, V333, P231
[10]   THE EVOLUTION OF THE COMPACT RADIO-SOURCE IN 3C 345 .1. VLBI OBSERVATIONS [J].
BIRETTA, JA ;
MOORE, RL ;
COHEN, MH .
ASTROPHYSICAL JOURNAL, 1986, 308 (01) :93-109