Long term study of the light curve of PKS 1510-089 in GeV energies

Abstract

We have analyzed data from the Flat Spectrum Radio Quasar PKS 1510-089 collected over a period of 8 years from August 2008 to December 2016 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 few sub-flares/sub-structures have been identified in our study. The fastest variability time is found to be 1.30$\pm$0.18 hr between MJD 55852.063 and 55852.188 where we estimate the minimum size of the emission region to be $4.85\times 10^{15}$ cm. In most of the flares the spectral energy distributions are better fitted with Logparabolic distribution compared to simple Power law or Power law with exponential cut-offs. This has strong physics implications regarding the nature of the high energy gamma-ray emission region.

arXiv comment29 pages, 29 figures, Accepted in ApJ

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Cited by in corpus (17)

• Transient Quasi-Periodic Oscillations at $\gamma$-rays in the TeV Blazar PKS 1510-089
• Detection of persistent VHE gamma-ray emission from PKS 1510-089 by the MAGIC telescopes during low states between 2012 and 2017
• Fermi-Large Area Telescope observations of the brightest Gamma-ray flare ever detected from CTA 102
• Two-zone emission modeling of PKS 1510-089 during the high state of 2015
• Correlation between optical and $\gamma$-ray flux variations in bright flat spectrum radio quasars
• Exploring the origin of multiwavelength activities of high-redshift FSRQ PKS 1502+106 during 2014-2018
• Ejection of Double knots from the radio core of PKS 1510--089 during the strong gamma-ray flares in 2015
• Exploring the Variability of the Flat Spectrum Radio Source 1633+382. II: Physical Properties
• Gamma-Ray Flares in Long Term Light Curve of 3C 454.3
• Exploring the Nature of the 2016 γ-ray Emission in the Blazar 1749+096
• Interferometric Monitoring of Gamma-ray Bright AGNs: Measuring the Magnetic Field Strength of 4C +29.45
• Diversity of gamma-ray and Radio Variabilities of Bright Blazars and Implications for gamma-ray Emission Location
• Detection of VHE gamma-ray transients with monitoring facilities
• Gamma-ray flares and broadband spectral study of PKS 0402-362
• Multi-frequency Variability Study of Flat-Spectrum Radio Quasar PKS 0346-27
• Spectral Modeling of Flares in Long Term Gamma-Ray Light Curve of PKS 0903-57
• Broadband Spectro-temporal Study on Blazar TXS 1700+685