FACT — LONGTERM MONITORING OF BRIGHT TeV BLAZARS
نویسندگان
چکیده
منابع مشابه
Monitoring of Bright Blazars with MAGIC
Blazars, a class of Active Galactic Nuclei (AGN) characterized by a close orientation of their relativistic outflows (jets) towards the line of sight, are a well established extragalactic TeV γ-ray emitters. Since 2006, three nearby and TeV bright blazars, Markarian (Mrk) 421, Mrk 501 and 1ES 1959+650, are regularly observed by the MAGIC telescope with single exposures of 30 to 60 minutes. The ...
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Since the first TeV blazar Markarian (Mrk) 421 was detected in 1992, the number of established TeV γ-ray emitting BL Lac objects has grown to 6, with redshifts ranging from 0.031 (Mrk 421) to 0.129 (H 1426+428). The intensive study of these sources has had a major impact on our understanding of the blazar phenomenon. The most notable observational results have been extremely fast large amplitud...
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Rapid variability of the TeV emission in several blazars implies a central black hole mass MBH < 10M⊙, appreciably smaller than the values estimated from the MBH −Lbulg relation, and Doppler factors for the γ-ray emitting fluid much larger than those associated with radio patterns. We discuss the conditions in the central engine required to account for the short timescales and large luminositie...
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The peak of the de-absorbed energy distribution of the TeV emitting blazars, all of the BL Lacertae (BL) class, can reach values up to ∼ 10 TeV. In the context of synchrotron-self Compton (SSC) models of relativistic uniformly moving blobs of plasma, such high energy peak emission can be reproduced only by assuming Doppler factors of δ ∼ 50. However, such high values strongly disagree with the ...
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We studied all blazars of known redshift detected by the Fermi satellite during its first three– months survey. For the majority of them, pointed Swift observations ensures a good multiwavelength coverage, enabling us to to reliably construct their spectral energy distributions (SED). We model the SEDs using a one–zone leptonic model and study the distributions of the derived interesting physic...
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ژورنال
عنوان ژورنال: Acta Polytechnica
سال: 2014
ISSN: 1805-2363,1210-2709
DOI: 10.14311/ap.2014.54.0210