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Title: Long-term multiwavelength studies of high-redshift blazar 0836+710

The observation of γ-ray flares from blazar 0836+710 in 2011, following a period of quiescence, offered an opportunity to study correlated activity at different wavelengths for a high-redshift (z = 2.218) active galactic nucleus. Here, optical and radio monitoring, plus Fermi-LAT γ-ray monitoring provided 20082–2012 coverage, while Swift offered auxiliary optical, ultraviolet, and X-ray information. Other contemporaneous observations were used to construct a broad-band spectral energy distribution. As a result, there is evidence of correlation but not a measurable lag between the optical and γ-ray flaring emission. In contrast, there is no clear correlation between radio and γ-ray activity, indicating radio emission regions that are unrelated to the parts of the jet that produce the γ rays. In conclusion, the γ-ray energy spectrum is unusual in showing a change of shape from a power law to a curved spectrum when going from the quiescent state to the active state.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [5] ;  [5] ;  [6] ;  [7] ;  [8]
  1. Univ. of Cukurova, Adana (Turkey); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  2. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  3. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); Univ. of Maryland, College Park, MD (United States)
  4. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); Univ. of Maryland Baltimore County (UMBC), Baltimore, MD (United States)
  5. Max-Planck-Institut fur Radioastonomie, Bonn (Germany)
  6. Stockholm Univ., Stockholm (Sweden); The Oskar Klein Centre for Cosmoparticle Physics, Stockholm (Sweden)
  7. Astro Space Center of Lebedev Physical Institute, Moscow (Russia); Moscow State Univ., Moscow (Russia)
  8. Abastumani Observatory, Abastumani (Republic of Georgia); Zentrum fur Astronomie der Univ. Heidelberg, Heidelberg (Germany); Kazan Federal Univ., Tatarstan (Russia)
Publication Date:
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Astronomy and Astrophysics
Additional Journal Information:
Journal Volume: 556; Journal ID: ISSN 0004-6361
Publisher:
EDP Sciences
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; galaxies: active; gamma rays: galaxies; quasars: individual: 0836+710
OSTI Identifier:
1356563

Akyuz, A., Thompson, D. J., Donato, D., Perkins, J. S., Fuhrmann, L., Angelakis, E., Zensus, J. A., Larsson, S., Sokolovsky, K., and Kurtanidze, O.. Long-term multiwavelength studies of high-redshift blazar 0836+710. United States: N. p., Web. doi:10.1051/0004-6361/201321721.
Akyuz, A., Thompson, D. J., Donato, D., Perkins, J. S., Fuhrmann, L., Angelakis, E., Zensus, J. A., Larsson, S., Sokolovsky, K., & Kurtanidze, O.. Long-term multiwavelength studies of high-redshift blazar 0836+710. United States. doi:10.1051/0004-6361/201321721.
Akyuz, A., Thompson, D. J., Donato, D., Perkins, J. S., Fuhrmann, L., Angelakis, E., Zensus, J. A., Larsson, S., Sokolovsky, K., and Kurtanidze, O.. 2013. "Long-term multiwavelength studies of high-redshift blazar 0836+710". United States. doi:10.1051/0004-6361/201321721. https://www.osti.gov/servlets/purl/1356563.
@article{osti_1356563,
title = {Long-term multiwavelength studies of high-redshift blazar 0836+710},
author = {Akyuz, A. and Thompson, D. J. and Donato, D. and Perkins, J. S. and Fuhrmann, L. and Angelakis, E. and Zensus, J. A. and Larsson, S. and Sokolovsky, K. and Kurtanidze, O.},
abstractNote = {The observation of γ-ray flares from blazar 0836+710 in 2011, following a period of quiescence, offered an opportunity to study correlated activity at different wavelengths for a high-redshift (z = 2.218) active galactic nucleus. Here, optical and radio monitoring, plus Fermi-LAT γ-ray monitoring provided 20082–2012 coverage, while Swift offered auxiliary optical, ultraviolet, and X-ray information. Other contemporaneous observations were used to construct a broad-band spectral energy distribution. As a result, there is evidence of correlation but not a measurable lag between the optical and γ-ray flaring emission. In contrast, there is no clear correlation between radio and γ-ray activity, indicating radio emission regions that are unrelated to the parts of the jet that produce the γ rays. In conclusion, the γ-ray energy spectrum is unusual in showing a change of shape from a power law to a curved spectrum when going from the quiescent state to the active state.},
doi = {10.1051/0004-6361/201321721},
journal = {Astronomy and Astrophysics},
number = ,
volume = 556,
place = {United States},
year = {2013},
month = {7}
}