Long-term Study of the Light Curve of PKS 1510-089 in GeV Energies

被引：23

作者：

Prince, Raj ^{[1
]}

Majumdar, Pratik ^{[2
]}

Gupta, Nayantara ^{[1
]}

机构：

[1] Raman Res Inst, Bangalore 560080, Karnataka, India

[2] HBNI, Saha Inst Nucl Phys, Kolkata 700064, W Bengal, India

来源：

ASTROPHYSICAL JOURNAL | 2017年 / 844卷 / 01期

关键词：

galaxies: active; gamma rays: galaxies; quasars: individual (PKS 1510-089); LARGE-AREA TELESCOPE; SPECTRUM RADIO QUASAR; FERMI-DETECTED BLAZARS; GAMMA-RAY VARIABILITY; EMISSION; REGION; LOCATION; FLARES; JUNE; LAT;

D O I：

10.3847/1538-4357/aa78f4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have analyzed data from the flat-spectrum radio quasar PKS 1510-089 collected over a period of eight years from 2008 August to 2016 December with the Fermi-LAT. We have identified several flares of this highly variable source, studied their temporal and spectral properties in detail, and compared with previous works on flares of PKS 1510-089. Five major flares and a few subflares or substructures have been identified in our study. The fastest variability time is found to be 1.30 +/- 0.18 hr between MJD 55852.063 and 55852.188, where we estimate the minimum size of the emission region to be 4.85 x 10(15) cm. In most of the flares, the spectral energy distributions are better fitted with a log-parabolic distribution compared to a simple power law or a power law with exponential cutoffs. This has strong physics implications regarding the nature of the high-energy gamma-ray emission region.

引用

页数：35

共 50 条

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