Multifrequency monitoring of the blazar 0716+714 during the GASP-WEBT-AGILE campaign of 2007

被引：109

作者：

Villata, M. ^{[1
]}

Raiteri, C. M. ^{[1
]}

Larionov, V. M. ^{[2
,3
]}

Kurtanidze, O. M. ^{[4
,5
]}

Nilsson, K. ^{[6
]}

Aller, M. F. ^{[7
]}

Tornikoski, M. ^{[8
]}

Volvach, A.

Aller, H. D. ^{[7
]}

Arkharov, A. A. ^{[3
]}

Bach, U. ^{[9
]}

Beltrame, P.

Bhatta, G. ^{[10
]}

Buemi, C. S. ^{[11
]}

Boettcher, M. ^{[12
]}

Calcidese, P. ^{[13
]}

Carosati, D. ^{[14
]}

Castro-Tirado, A. J. ^{[15
]}

Da Rio, D.

Di Paola, A. ^{[16
]}

Dolci, M. ^{[17
]}

Forne, E.

Frasca, A. ^{[11
]}

Hagen-Thorn, V. A. ^{[2
]}

Heidt, J. ^{[5
]}

Hiriart, D. ^{[18
]}

Jelinek, M. ^{[15
]}

Kimeridze, G. N.

Konstantinova, T. S. ^{[2
]}

Kopatskaya, E. N. ^{[2
]}

Lanteri, L. ^{[1
]}

Leto, P. ^{[19
]}

Ligustri, R.

Lindfors, E. ^{[6
]}

Lahteenmaki, A. ^{[8
]}

Marilli, E. ^{[11
]}

Nieppola, E. ^{[8
]}

Nikolashvili, M. G.

Pasanen, M. ^{[6
]}

Ragozzine, B. ^{[12
]}

Ros, J. A.

Sigua, L. A.

Smart, R. L. ^{[1
]}

Sorcia, M. ^{[18
]}

Takalo, L. O. ^{[6
]}

Tavani, M. ^{[20
]}

Trigilio, C. ^{[11
]}

Turchetti, R.

Uckert, K. ^{[12
]}

Umana, G. ^{[11
]}

机构：

[1] INAF, Osservatorio Astron Torino, Turin, Italy

[2] St Petersburg State Univ, Astron Inst, St Petersburg, Russia

[3] Pulkovo Observ, Moscow, Russia

[4] Astrophys Inst Potsdam, Potsdam, Germany

[5] Landessternwarte Heidelberg Konigstuhl, Heidelberg, Germany

[6] Univ Turku, Tuorla Observ, SF-20500 Turku, Finland

[7] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

[8] Helsinki Univ Technol, Metsahovi Radio Obs, Helsinki, Finland

[9] Max Planck Inst Radioastron, Leipzig, Germany

[10] Florida Int Univ, SARA Observ, Miami, FL 33199 USA

[11] INAF, Osservatorio Astrofis Catania, Rome, Italy

[12] Ohio Univ, Dept Phys & Astron, Inst Astrophys, Athens, OH 45701 USA

[13] Oss Astron Reg Autonoma Valle Aosta, Rome, Italy

[14] Armenzano Astron Observ, Rome, Italy

[15] CSIC, Inst Astrophys Andalucia, Barcelona, Spain

[16] INAF, Osservatorio Astron Roma, Rome, Italy

[17] INAF, Osservatorio Astron Teramo, Rome, Italy

[18] Univ Nacl Autonoma Mexico, Inst Astron, Mexico City, DF, Mexico

[19] INAF, Inst Radioastron, Sez Noto, Rome, Italy

[20] INAF, IASF Roma, Rome, Italy

[21] INAF, IASF Milano, Milan, Italy

来源：

ASTRONOMY & ASTROPHYSICS | 2008年 / 481卷 / 02期

关键词：

galaxies : active; galaxies : BL Lacertae objects : general; galaxies : BL Lacertae objects : individual : S5 0716+71; galaxies : jets;

D O I：

10.1051/0004-6361:200809552

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Aims. Since the CGRO operation in 1991-2000, one of the primary unresolved questions about the blazar gamma-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 gamma-ray detections by the AGILE and GLAST satellites. This new WEBT project started in early September 2007, just before a strong gamma-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 gamma-ray events.

引用

页码：L79 / L82

页数：4

共 21 条

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