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|---|---|---|
| 000 | 12462naa a2203013 4500 | |
| 001 | oai:DiVA.org:lnu-30223 | |
| 003 | SwePub | |
| 008 | 131108s2012 | |||||||||||000 ||eng| | |
| 009 | oai:DiVA.org:kth-96741 | |
| 009 | oai:DiVA.org:su-80153 | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-302232 URI |
| 024 | 7 | a https://doi.org/10.1051/0004-6361/2011175092 DOI |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-967412 URI |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-801532 URI |
| 040 | a (SwePub)lnud (SwePub)kthd (SwePub)su | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Abramowski, A.4 aut |
| 245 | 1 0 | a A multiwavelength view of the flaring state of PKS 2155-304 in 2006 |
| 264 | c 2012-03-09 | |
| 264 | 1 | b EDP Sciences,c 2012 |
| 338 | a print2 rdacarrier | |
| 500 | a QC 20120613 | |
| 500 | a AuthorCount:210; | |
| 520 | a Context. Multiwavelength (MWL) observations of the blazar PKS 2155-304 during two weeks in July and August 2006, the period when two exceptional flares at very high energies (VHE, E greater than or similar to 100 GeV) occurred, provide a detailed picture of the evolution of its emission. The complete data set from this campaign is presented, including observations in VHE gamma-rays (H.E.S. S.), X-rays (RXTE, Chandra, Swift XRT), optical (Swift UVOT, Bronberg, Watcher, ROTSE), and in the radio band (NRT, HartRAO, ATCA). Optical and radio light curves from 2004 to 2008 are compared to the available VHE data from this period, to put the 2006 campaign into the context of the long-term evolution of the source. Aims. The data set offers a close view of the evolution of the source on different time scales and yields new insights into the properties of the emission process. The predictions of synchrotron self-Compton (SSC) scenarios are compared to the MWL data, with the aim of describing the dominant features in the data down to the hour time scale. Methods. The spectral variability in the X-ray and VHE bands is explored and correlations between the integral fluxes at different wavelengths are evaluated. SSC modelling is used to interpret the general trends of the varying spectral energy distribution. Results. The X-ray and VHE gamma-ray emission are correlated during the observed high state of the source, but show no direct connection with longer wavelengths. The long-term flux evolution in the optical and radio bands is found to be correlated and shows that the source reaches a high state at long wavelengths after the occurrence of the VHE flares. Spectral hardening is seen in the Swift XRT data. Conclusions. The nightly averaged high-energy spectra of the non-flaring nights can be reproduced by a stationary one-zone SSC model, with only small variations in the parameters. The spectral and flux evolution in the high-energy band during the night of the second VHE flare is modelled with multi-zone SSC models, which can provide relatively simple interpretations for the hour time-scale evolution of the high-energy emission, even for such a complex data set. For the first time in this type of source, a clear indication is found for a relation between high activity at high energies and a long-term increase in the low frequency fluxes. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 650 | 7 | a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng |
| 653 | a galaxies: active | |
| 653 | a radiation mechanisms: non-thermal | |
| 653 | a gamma rays: galaxies | |
| 653 | a BL Lacertae objects: individual: PKS 2155-304 | |
| 653 | a Astropartikelfysik | |
| 653 | a Astroparticle Physics | |
| 700 | 1 | a Acero, F.4 aut |
| 700 | 1 | a Aharonian, F.4 aut |
| 700 | 1 | a Akhperjanian, A. G.4 aut |
| 700 | 1 | a Anton, G.4 aut |
| 700 | 1 | a Balzer, A.4 aut |
| 700 | 1 | a Barnacka, A.4 aut |
| 700 | 1 | a de Almeida, U. Barres4 aut |
| 700 | 1 | a Becherini, Yvonne4 aut |
| 700 | 1 | a Becker, J.4 aut |
| 700 | 1 | a Behera, B.4 aut |
| 700 | 1 | a Benbow, W.4 aut |
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| 700 | 1 | a Buesching, I.4 aut |
| 700 | 1 | a Carrigan, S.4 aut |
| 700 | 1 | a Casanova, S.4 aut |
| 700 | 1 | a Cerruti, M.4 aut |
| 700 | 1 | a Punch, Michaelu Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France4 aut0 (Swepub:lnu)mipuaa |
| 700 | 1 | a Charbonnier, A.4 aut |
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| 700 | 1 | a Coignet, G.4 aut |
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| 700 | 1 | a Conrad, Janu Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)conrad |
| 700 | 1 | a Coudreau, N.4 aut |
| 700 | 1 | a Dalton, M.4 aut |
| 700 | 1 | a Daniel, M. K.4 aut |
| 700 | 1 | a Davids, I. D.4 aut |
| 700 | 1 | a Degrange, B.4 aut |
| 700 | 1 | a Deil, C.4 aut |
| 700 | 1 | a Dickinson, Hugh J.u Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)hdick |
| 700 | 1 | a Djannati-Atai, A.4 aut |
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| 700 | 1 | a Ripken, Joachimu Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)ripken |
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| 710 | 2 | a Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, Franceb Fysikum4 org |
| 773 | 0 | t Astronomy and Astrophysicsd : EDP Sciencesg 539, s. A149-q 539<A149-x 0004-6361x 1432-0746 |
| 856 | 4 | u https://www.aanda.org/articles/aa/pdf/2012/03/aa17509-11.pdf |
| 856 | 4 | u https://doi.org/10.1051/0004-6361/201117509y Fulltext |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-30223 |
| 856 | 4 8 | u https://doi.org/10.1051/0004-6361/201117509 |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96741 |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-80153 |
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