Title:	Long-term study of the light curve of PKS 1510-089 in GeV Energies
Authors:	Prince, Raj Majumdar, Pratik Gupta, Nayantara
Keywords:	Galaxies active Gamma rays
Issue Date:	Jul-2017
Publisher:	IOP Sciences for The American Astronomical Society
Citation:	The Astrophysical Journal, 2017, Vol.844, p62
Abstract:	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 × 1015 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.
Description:	Open Access
URI:	http://hdl.handle.net/2289/6751
ISSN:	0004-637X 1538-4357-(Online)
Alternative Location:	http://adsabs.harvard.edu/abs/2017ApJ...844...62P http://arxiv.org/abs/1706.02133 http://dx.doi.org/10.3847/1538-4357/aa78f4
Copyright:	2017, The American Astronomical Society.
Appears in Collections:	Research Papers (A&A)

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