Radio to gamma-ray variability study of blazar S5 0716+714
Abstract
In this paper, we present the results of a series of radio, optical, X-ray, and γ-ray observations of the BL Lac object S50716+714 carried out between April 2007 and January 2011. The multifrequency observations were obtained using several ground- and space-based facilities. The intense optical monitoring of the source reveals faster repetitive variations superimposed on a long-term variability trend on a time scale of ~350 days. Episodes of fast variability recur on time scales of ~60-70 days. The intense and simultaneous activity at optical and γ-ray frequencies favors the synchrotron self-Compton mechanism for the production of the high-energy emission. Two major low-peaking radio flares were observed during this high optical/γ-ray activity period. The radio flares are characterized by a rising and a decaying stage and agrees with the formation of a shock and its evolution. We found that the evolution of the radio flares requires a geometrical variation in addition to intrinsic variations of the source. Different estimates yield robust and self-consistent lower limits of δ ≥ 20 and equipartition magnetic field Beq ≥ 0.36 G. Causality arguments constrain the size of emission region θ ≤ 0.004 mas. We found a significant correlation between flux variations at radio frequencies withmore »
- Authors:
- more »
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- Contributing Org.:
- Fermi-LAT Collaboration
- OSTI Identifier:
- 1356594
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Astronomy and Astrophysics
- Additional Journal Information:
- Journal Volume: 552; Journal ID: ISSN 0004-6361
- Publisher:
- EDP Sciences
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; galaxies: active; BL Lacertae objects: individual: S5 0716+714; gamma rays: galaxies; X-rays: galaxies; radio continuum: galaxies
Citation Formats
Rani, B., Krichbaum, T. P., Fuhrmann, L., Böttcher, M., Lott, B., Aller, H. D., Aller, M. F., Angelakis, E., Bach, U., Bastieri, D., Falcone, A. D., Fukazawa, Y., Gabanyi, K. E., Gupta, A. C., Gurwell, M., Itoh, R., Kawabata, K. S., Krips, M., Lähteenmäki, A. A., Liu, X., Marchili, N., Max-Moerbeck, W., Nestoras, I., Nieppola, E., Quintana-Lacaci, G., Readhead, A. C. S., Richards, J. L., Sasada, M., Sievers, A., Sokolovsky, K., Stroh, M., Tammi, J., Tornikoski, M., Uemura, M., Ungerechts, H., Urano, T., and Zensus, J. A. Radio to gamma-ray variability study of blazar S5 0716+714. United States: N. p., 2013.
Web. doi:10.1051/0004-6361/201321058.
Rani, B., Krichbaum, T. P., Fuhrmann, L., Böttcher, M., Lott, B., Aller, H. D., Aller, M. F., Angelakis, E., Bach, U., Bastieri, D., Falcone, A. D., Fukazawa, Y., Gabanyi, K. E., Gupta, A. C., Gurwell, M., Itoh, R., Kawabata, K. S., Krips, M., Lähteenmäki, A. A., Liu, X., Marchili, N., Max-Moerbeck, W., Nestoras, I., Nieppola, E., Quintana-Lacaci, G., Readhead, A. C. S., Richards, J. L., Sasada, M., Sievers, A., Sokolovsky, K., Stroh, M., Tammi, J., Tornikoski, M., Uemura, M., Ungerechts, H., Urano, T., & Zensus, J. A. Radio to gamma-ray variability study of blazar S5 0716+714. United States. https://doi.org/10.1051/0004-6361/201321058
Rani, B., Krichbaum, T. P., Fuhrmann, L., Böttcher, M., Lott, B., Aller, H. D., Aller, M. F., Angelakis, E., Bach, U., Bastieri, D., Falcone, A. D., Fukazawa, Y., Gabanyi, K. E., Gupta, A. C., Gurwell, M., Itoh, R., Kawabata, K. S., Krips, M., Lähteenmäki, A. A., Liu, X., Marchili, N., Max-Moerbeck, W., Nestoras, I., Nieppola, E., Quintana-Lacaci, G., Readhead, A. C. S., Richards, J. L., Sasada, M., Sievers, A., Sokolovsky, K., Stroh, M., Tammi, J., Tornikoski, M., Uemura, M., Ungerechts, H., Urano, T., and Zensus, J. A. Wed .
"Radio to gamma-ray variability study of blazar S5 0716+714". United States. https://doi.org/10.1051/0004-6361/201321058. https://www.osti.gov/servlets/purl/1356594.
@article{osti_1356594,
title = {Radio to gamma-ray variability study of blazar S5 0716+714},
author = {Rani, B. and Krichbaum, T. P. and Fuhrmann, L. and Böttcher, M. and Lott, B. and Aller, H. D. and Aller, M. F. and Angelakis, E. and Bach, U. and Bastieri, D. and Falcone, A. D. and Fukazawa, Y. and Gabanyi, K. E. and Gupta, A. C. and Gurwell, M. and Itoh, R. and Kawabata, K. S. and Krips, M. and Lähteenmäki, A. A. and Liu, X. and Marchili, N. and Max-Moerbeck, W. and Nestoras, I. and Nieppola, E. and Quintana-Lacaci, G. and Readhead, A. C. S. and Richards, J. L. and Sasada, M. and Sievers, A. and Sokolovsky, K. and Stroh, M. and Tammi, J. and Tornikoski, M. and Uemura, M. and Ungerechts, H. and Urano, T. and Zensus, J. A.},
abstractNote = {In this paper, we present the results of a series of radio, optical, X-ray, and γ-ray observations of the BL Lac object S50716+714 carried out between April 2007 and January 2011. The multifrequency observations were obtained using several ground- and space-based facilities. The intense optical monitoring of the source reveals faster repetitive variations superimposed on a long-term variability trend on a time scale of ~350 days. Episodes of fast variability recur on time scales of ~60-70 days. The intense and simultaneous activity at optical and γ-ray frequencies favors the synchrotron self-Compton mechanism for the production of the high-energy emission. Two major low-peaking radio flares were observed during this high optical/γ-ray activity period. The radio flares are characterized by a rising and a decaying stage and agrees with the formation of a shock and its evolution. We found that the evolution of the radio flares requires a geometrical variation in addition to intrinsic variations of the source. Different estimates yield robust and self-consistent lower limits of δ ≥ 20 and equipartition magnetic field Beq ≥ 0.36 G. Causality arguments constrain the size of emission region θ ≤ 0.004 mas. We found a significant correlation between flux variations at radio frequencies with those at optical and γ-rays. Theoptical/GeV flux variations lead the radio variability by ~65 days. The longer time delays between low-peaking radio outbursts and optical flares imply that optical flares are the precursors of radio ones. An orphan X-ray flare challenges the simple, one-zone emission models, rendering them too simple. Finally, here we also describe the spectral energy distribution modeling of the source from simultaneous data taken through different activity periods.},
doi = {10.1051/0004-6361/201321058},
journal = {Astronomy and Astrophysics},
number = ,
volume = 552,
place = {United States},
year = {Wed Mar 13 00:00:00 EDT 2013},
month = {Wed Mar 13 00:00:00 EDT 2013}
}
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Multiwavelength Picture of the Blazar S5 0716+714 during Its Brightest Outburst
text, January 2016
- Manganaro, Marina; Pedaletti, Giovanna; Doert, Marlene
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Location of Gamma-ray emission and magnetic field strengths in OJ 287
text, January 2016
- Hodgson, J. A.; Krichbaum, T. P.; Marscher, A. P.
- arXiv
Multiwavelength picture of the blazar S5 0716+714 during its brightest outburst
text, January 2017
- Manganaro, Marina; Pedaletti, Giovanna; Doert, Marlene
- arXiv
Interferometric Monitoring of Gamma-ray Bright AGNs: S5 0716+714
text, January 2017
- Lee, Jee Won; Lee, Sang-Sung; Hodgson, Jeffrey A.
- arXiv
Multiwavelength Photometric and Spectropolarimetric Analysis of the FSRQ 3C 279
text, January 2018
- Patiño-Álvarez, V. M.; Fernandes, S.; Chavushyan, V.
- arXiv
Multiwavelength Cross-Correlations and Flaring Activity in Bright Blazars
text, January 2018
- Liodakis, I.; Romani, R. W.; Filippenko, A. V.
- arXiv
Ejection of Double knots from the radio core of PKS 1510--089 during the strong gamma-ray flares in 2015
text, January 2019
- Park, Jongho; Lee, Sang-Sung; Kim, Jae-Young
- arXiv
Optical variability modeling of newly identified blazar candidates behind Magellanic Clouds
text, January 2019
- Żywucka, Natalia; Tarnopolski, Mariusz; Böttcher, Markus
- arXiv
H.E.S.S. Monitoring of PKS 2155-304 in 2015 and 2016
text, January 2019
- Wierzcholska, Alicja; Zacharias, Michael; Jankowsky, Felix
- arXiv