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Very rapid high-amplitude gamma-ray variability in luminous blazar PKS 1510–089 studied with Fermi-LAT

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Very rapid high-amplitude gamma-ray variability in luminous blazar PKS 1510–089 studied with Fermi-LAT

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dc.contributor.author Saito, S. pl
dc.contributor.author Stawarz, Łukasz [SAP11018649] pl
dc.contributor.author Tanaka, Y. T. pl
dc.contributor.author Takahashi, T. pl
dc.contributor.author Madejski, G. pl
dc.contributor.author D’Ammando, F. pl
dc.date.accessioned 2015-06-09T07:59:26Z
dc.date.available 2015-06-09T07:59:26Z
dc.date.issued 2013 pl
dc.identifier.issn 2041-8205 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/9060
dc.language eng pl
dc.title Very rapid high-amplitude gamma-ray variability in luminous blazar PKS 1510–089 studied with Fermi-LAT pl
dc.type JournalArticle pl
dc.abstract.en Here we report on the detailed analysis of the $\gamma$-ray light curve of a luminous blazar PKS 1510−089 observed in the GeV range with the Large Area Telescope (LAT) on board the Fermi satellite during the period 2011 September–December. By investigating the properties of the detected three major flares with the shortest possible time binning allowed by the photon statistics, we find a variety of temporal characteristics and variability patterns. This includes a clearly asymmetric profile (with a faster flux rise and a slower decay) of the flare resolved on sub-daily timescales, a superposition of many short uncorrelated flaring events forming the apparently coherent longer-duration outburst, and a huge single isolated outburst unresolved down to the timescale of 3 hr. In the latter case we estimate the corresponding $\gamma$-ray flux doubling timescale to be below 1 hr, which is extreme and never previously reported for any active galaxy in the GeV range. The other unique finding is that the total power released during the studied rapid and high-amplitude flares constitutes the bulk of the power radiatively dissipated in the source and a significant fraction of the total kinetic luminosity of the underlying relativistic outflow. Our analysis allows us to access directly the characteristic timescales involved in shaping the energy dissipation processes in the source, and to provide constraints on the location and the structure of the blazar emission zone in PKS 1510−089. pl
dc.subject.en acceleration of particles pl
dc.subject.en galaxies: active pl
dc.subject.en galaxies: jets pl
dc.subject.en gamma rays: galaxies pl
dc.subject.en quasars: individual (PKS1510−089) pl
dc.subject.en radiation mechanisms: non-thermal pl
dc.description.volume 766 pl
dc.description.number 1 pl
dc.identifier.doi 10.1088/2041-8205/766/1/L11 pl
dc.identifier.eissn 2041-8213 pl
dc.title.journal The Astrophysical Journal Letters pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne pl
dc.subtype Article pl
dc.identifier.articleid L11 pl
dc.rights.original OTHER; otwarte czasopismo; ostateczna wersja wydawcy; po opublikowaniu; 12; pl
.pointsMNiSW [2013 A]: 40


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