Results of WEBT, VLBA and RXTE monitoring of 3C 279 during 2006-2007

被引：111

作者：

Larionov, V. M. ^{[1
]}

Jorstad, S. G. ^{[1
]}

Marscher, A. P. ^{[17
]}

Raiteri, C. M. ^{[3
]}

Villata, M. ^{[3
]}

Agudo, I. ^{[4
]}

Aller, M. F. ^{[5
]}

Arkharov, A. A. ^{[2
]}

Asfandiyarov, I. M. ^{[16
]}

Bach, U. ^{[6
]}

Bachev, R. ^{[7
]}

Berdyugin, A. ^{[22
]}

Boettcher, M. ^{[8
]}

Buemi, C. S. ^{[12
]}

Calcidese, P.

Carosati, D.

Charlot, P. ^{[9
]}

Chen, W. -P. ^{[10
]}

Di Paola, A. ^{[11
]}

Dolci, M.

Dogru, S.

Doroshenko, V. T. ^{[28
]}

Efimov, Yu. S. ^{[28
]}

Erdem, A.

Frasca, A. ^{[12
]}

Fuhrmann, L. ^{[6
]}

Giommi, P. ^{[30
]}

Glowienka, L. ^{[13
]}

Gupta, A. C. ^{[14
,35
]}

Gurwell, M. A. ^{[15
]}

Hagen-Thorn, V. A. ^{[1
]}

Hsiao, W. -S. ^{[10
]}

Ibrahimov, M. A. ^{[16
]}

Jordan, B. ^{[17
]}

Kamada, M. ^{[18
]}

Konstantinova, T. S. ^{[1
]}

Kopatskaya, E. N. ^{[1
]}

Kovalev, Y. Y. ^{[6
,19
]}

Kovalev, Y. A. ^{[19
]}

Kurtanidze, O. M.

Lahteenmaki, A. ^{[20
]}

Lanteri, L. ^{[3
]}

Larionova, L. V. ^{[1
,2
]}

Leto, P. ^{[31
]}

Le Campion, P. ^{[9
]}

Lee, C. -U.

Lindfors, E. ^{[22
]}

Marilli, E. ^{[12
]}

McHardy, I. ^{[21
]}

Mingaliev, M. G. ^{[33
]}

机构：

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

[2] Pulkovo Observ, St Petersburg, Russia

[3] Osserv Astron Torino, INAF, Turin, Italy

[4] CSIC, Inst Astrofis Andalucia, Granada, Spain

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

[6] Max Planck Inst Radioastron, D-5300 Bonn, Germany

[7] Bulgarian Acad Sci, Inst Astron, Sofia, Bulgaria

[8] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA

[9] Univ Bordeaux 1, Astrophys Lab, Floirac, France

[10] Natl Cent Univ, Inst Astron, Chungli, Taiwan

[11] Osserv Astron Roma, INAF, Rome, Italy

[12] Osserv Astrofis Catania, INAF, Catania, Italy

[13] Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

[14] Chinese Acad Sci, YNAO, Kunming, Peoples R China

[15] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[16] Ulugh Beg Astron Inst, Tashkent, Uzbekistan

[17] Boston Univ, Inst Astrophys Res, Boston, MA 02215 USA

[18] Osaka Kyoiku Univ, Astron Inst, Osaka, Japan

[19] PN Lebedev Phys Inst, Ctr Astro Space, Moscow 117924, Russia

[20] Helsinki Univ Technol, Metsahovi Radio Obs, FIN-02150 Espoo, Finland

[21] Univ Southampton, Southampton SO9 5NH, Hants, England

[22] Univ Turku, Tuorla Observ, Piikkio, Finland

[23] Michael Adrian Observ, Trebur, Germany

[24] Cardiff Univ, Cardiff, S Glam, Wales

[25] Nord Opt Telescope, Santa Cruz De La Palma, Spain

[26] Agrupacio Astron Sabadell, Sabadell, Spain

[27] Univ Colorado, Dept Phys, Denver, CO 80202 USA

[28] Crimean Astrophys Observ, Simferopol, Ukraine

[29] Crimean Astrophys Observ, Radio Astron Lab, Simferopol, Ukraine

[30] ASI Sci Data Ctr, Frascati, Italy

[31] Ist Radioastron, INAF, Sez Noto, Noto, Italy

[32] Cork Inst Technol, Cork, Ireland

[33] Special Astrophys Observ, N Arkhyz, Russia

[34] Inst Radioastron Millimetr, Granada, Spain

[35] ARIES, Naini Tal, India

来源：

ASTRONOMY & ASTROPHYSICS | 2008年 / 492卷 / 02期

基金：

英国科学技术设施理事会;

关键词：

galaxies: active; quasars: general; quasars: individual: 3C 279;

D O I：

10.1051/0004-6361:200810937

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. The quasar 3C 279 is among the most extreme blazars in terms of luminosity and variability of flux at all wavebands. Its variations in flux and polarization are quite complex and therefore require intensive monitoring observations at multiple wavebands to characterise and interpret the observed changes. Aims. In this paper, we present radio-to-optical data taken by the WEBT, supplemented by our VLBA and RXTE observations, of 3C 279. Our goal is to use this extensive database to draw inferences regarding the physics of the relativistic jet. Methods. We assemble multifrequency light curves with data from 30 ground-based observatories and the space-based instruments SWIFT (UVOT) and RXTE, along with linear polarization vs. time in the optical R band. In addition, we present a sequence of 22 images (with polarization vectors) at 43 GHz at resolution 0.15 milliarcsec, obtained with the VLBA. We analyse the light curves and polarization, as well as the spectral energy distributions at different epochs, corresponding to different brightness states. Results. We find that the IR-optical-UV continuum spectrum of the variable component corresponds to a power law with a constant slope of -1.6, while in the 2.4-10 keV X-ray band it varies in slope from -1.1 to -1.6. The steepest X- ray spectrum occurs at a flux minimum. During a decline in flux from maximum in late 2006, the optical and 43 GHz core polarization vectors rotate by similar to 300 degrees. Conclusions. The continuum spectrum agrees with steady injection of relativistic electrons with a power-law energy distribution of slope -3.2 that is steepened to -4.2 at high energies by radiative losses. The X- ray emission at flux minimum comes most likely from a new component that starts in an upstream section of the jet where inverse Compton scattering of seed photons from outside the jet is important. The rotation of the polarization vector implies that the jet contains a helical magnetic field that extends similar to 20 pc past the 43 GHz core.

引用

页码：389 / 400

页数：12

共 50 条

[1] The WEBT campaign on the Blazar 3C 279 in 2006 [J].

Boettcher, M. ;

Basu, S. ;

Joshi, M. ;

Villata, M. ;

Arai, A. ;

Aryan, N. ;

Asfandiyarov, I. M. ;

Bach, U. ;

Bachev, R. ;

Berduygin, A. ;

Blaek, M. ;

Buemi, C. ;

Castro-Tirado, A. J. ;

Postigo, A. De Ugarte ;

Frasca, A. ;

Fuhrmann, L. ;

Hagen-Thorn, V. A. ;

Henson, G. ;

Hovatta, T. ;

Hudec, R. ;

Ibrahimov, M. ;

Ishii, Y. ;

Ivanidze, R. ;

Jelinek, M. ;

Kamada, M. ;

Kapanadze, B. ;

Katsuura, M. ;

Kotaka, D. ;

Kovalev, Y. Y. ;

Kovalev, Yu. A. ;

Kubanek, P. ;

Kurosaki, M. ;

Kurtanidze, O. ;

Laehteenmaeki, A. ;

Lanteri, L. ;

Larionov, V. M. ;

Larionova, L. ;

Lee, C. -U. ;

Leto, P. ;

Lindfors, E. ;

Marilli, E. ;

Marshall, K. ;

Miller, H. R. ;

Mingaliev, M. G. ;

Mirabal, N. ;

Mizoguchi, S. ;

Nakamura, K. ;

Nieppola, E. ;

Nikolashvili, M. ;

Nilsson, K. .

ASTROPHYSICAL JOURNAL, 2007, 670 (02) :968-977

[2] Coordinated multiwavelength observation of 3C 66A during the WEBT campaign of 2003-2004 [J].

Böttcher, M ;

Harvey, J ;

Joshi, M ;

Villata, M ;

Raiteri, CM ;

Bramel, D ;

Mukherjee, R ;

Savolainen, T ;

Cui, W ;

Fossati, G ;

Smith, IA ;

Able, D ;

Aller, HD ;

Aller, MF ;

Arkharov, AA ;

Augusteijn, T ;

Baliyan, K ;

Barnaby, D ;

Berdyugin, A ;

Benítez, E ;

Boltwood, P ;

Carini, M ;

Carosati, D ;

Ciprini, S ;

Coloma, JM ;

Crapanzano, S ;

de Diego, JA ;

Di Paola, A ;

Dolci, M ;

Fan, J ;

Frasca, A ;

Hagen-Thorn, V ;

Horan, D ;

Ibrahimov, M ;

Kimeridze, GN ;

Kovalev, YA ;

Kovalev, YY ;

Kurtanidze, O ;

Lähteenmäki, A ;

Lanteri, L ;

Larionov, VM ;

Larionova, EG ;

Lindfors, E ;

Marilli, E ;

Mirabal, N ;

Nikolashvili, M ;

Nilsson, K ;

Ohlert, JM ;

Ohnishi, T ;

Oksanen, A .

ASTROPHYSICAL JOURNAL, 2005, 631 (01) :169-186

[3] REDSHIFT OF QUASI-STELLAR RADIO SOURCE 3C 279 [J].

BURBIDGE, EM ;

ROSENBER.FD .

ASTROPHYSICAL JOURNAL, 1965, 142 (04) :1673-&

[4] THE RELATIONSHIP BETWEEN INFRARED, OPTICAL, AND ULTRAVIOLET EXTINCTION [J].

CARDELLI, JA ;

CLAYTON, GC ;

MATHIS, JS .

ASTROPHYSICAL JOURNAL, 1989, 345 (01) :245-256

[5]

CHATTERJEE R, 2008, APJ IN PRESS, V689

[6]

COLLMAR W, 2007, 710 ARXIV

[7] Rapid multiwaveband polarization variability in the quasar PKS 0420-014: Optical emission from the compact radio jet [J].

D'Arcangelo, Francesca D. ;

Marscher, Alan P. ;

Jorstad, Svetlana G. ;

Smith, Paul S. ;

Larionov, Valeri M. ;

Hagen-Thorn, Vladimir A. ;

Kopatskaya, Eugenia N. ;

Williams, G. Grant ;

Gear, Walter K. .

ASTROPHYSICAL JOURNAL, 2007, 659 (02) :L107-L110

[8] THE DISCRETE CORRELATION-FUNCTION - A NEW METHOD FOR ANALYZING UNEVENLY SAMPLED VARIABILITY DATA [J].

EDELSON, RA ;

KROLIK, JH .

ASTROPHYSICAL JOURNAL, 1988, 333 (02) :646-659

[9] Radio circular polarization produced in helical magnetic fields in eight active galactic nuclei [J].

Gabuzda, D. C. ;

Vitrishchak, V. M. ;

Mahmud, M. ;

O'Sullivan, S. P. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2008, 384 (03) :1003-1014

[10]

Gomez J.-L., 2002, VLBA SCI MEMO, V30

← 1 2 3 4 5 →