VERY RAPID HIGH-AMPLITUDE GAMMA-RAY VARIABILITY IN LUMINOUS BLAZAR PKS 1510-089 STUDIED WITH FERMI-LAT

被引：111

作者：

Saito, S. ^{[1
,2
]}

Stawarz, L. ^{[1
,3
]}

Tanaka, Y. T. ^{[4
]}

Takahashi, T. ^{[1
,2
]}

Madejski, G. ^{[5
,6
]}

D'Ammando, F. ^{[7
,8
]}

机构：

[1] Inst Space & Astronaut Sci JAXA, Chuo Ku, Sagamihara, Kanagawa 2525210, Japan

[2] Univ Tokyo, Grad Sch Sci, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[3] Jagiellonian Univ, Astron Observ, PL-30244 Krakow, Poland

[4] Hiroshima Univ, Dept Phys Sci, Higashihiroshima, Hiroshima 7398526, Japan

[5] Stanford Univ, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, Stanford, CA 94305 USA

[6] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA

[7] Univ Perugia, Dip Fis, I-06123 Perugia, Italy

[8] Ist Nazl Fis Nucl, I-06123 Perugia, Italy

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2013年 / 766卷 / 01期

基金：

瑞典研究理事会;

关键词：

acceleration of particles; galaxies: active; galaxies: jets; gamma rays: galaxies; quasars: individual (PKS1510-089); radiation mechanisms: non-thermal; LARGE-AREA TELESCOPE; QUASAR; JET; EMISSION; CATALOG; REGION;

D O I：

10.1088/2041-8205/766/1/L11

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：6

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