A new activity phase of the blazar 3C 454.3 Multifrequency observations by the WEBT and XMM-Newton in 2007-2008
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F08%3A00035973" target="_blank" >RIV/00216224:14310/08:00035973 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26110/08:PU85946
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
A new activity phase of the blazar 3C 454.3 Multifrequency observations by the WEBT and XMM-Newton in 2007-2008
Original language description
In the optical band we observed a multi-peak outburst in July-August 2007, and other faster events in November 2007-February 2008. Colour analysis confirms a general redder-when-brighter trend, which reaches a "saturation" at R ~ 14 and possibly turns into a bluer-when-brighter trend in bright states. This behaviour is due to the interplay of different emission components, the synchrotron one possibly being characterised by an intrinsically variable spectrum. The most obvious interpretation implies that, as the beamed synchrotron radiation from the jet dims, we can see both the head and the tail of the big blue bump. The X-ray flux correlates with the optical flux, suggesting that in the inverse-Compton process either the seed photons are synchrotron photons at IR-optical frequencies or the relativistic electrons are those that produce the optical synchrotron emission. The X-ray radiation would thus be produced in the jet region from where the IR-optical emission comes.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomy and Astrophysics
ISSN
0004-6361
e-ISSN
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Volume of the periodical
491
Issue of the periodical within the volume
3
Country of publishing house
FR - FRANCE
Number of pages
11
Pages from-to
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UT code for WoS article
000261152900013
EID of the result in the Scopus database
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