Long-term multiwavelength studies of high-redshift blazar 0836+710
2013 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 556Article in journal (Refereed) Published
Aims. The observation of gamma-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. Methods. Optical and radio monitoring, plus Fermi-LAT gamma-ray monitoring provided 2008-2012 coverage, while Swift offered auxiliary optical, ultraviolet, and X-ray information. Other contemporaneous observations were used to construct a broad-band spectral energy distribution. Results. There is evidence of correlation but not a measurable lag between the optical and.-ray flaring emission. In contrast, there is no clear correlation between radio and gamma-ray activity, indicating radio emission regions that are unrelated to the parts of the jet that produce the gamma rays. The gamma-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.
Place, publisher, year, edition, pages
2013. Vol. 556
galaxies: active, gamma rays: galaxies, quasars: individual: 0836+710
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:su:diva-94585ISI: 000323893500071OAI: oai:DiVA.org:su-94585DiVA: diva2:654807