Rapid high-amplitude gamma-ray variability in Blazar PKS 0507+17

Abstract

We report a detailed analysis of $\gamma$-ray data of 2FGL J0509.9+1802 observed by the Large Area Telescope on board {\it Fermi} satellite, especially focusing on April 2013 when extraordinary $\gamma$-ray variability has been detected. Localization of $\gamma$-ray emission during this epoch suggests that the $\gamma$-ray source only associates with PKS 0507+17. The $\gamma$-ray emission of PKS 0507+17 is identified at the first time. The daily peak flux is over two orders of magnitude higher than the first two-year average flux, giving an isotropic $\gamma$-ray luminosity of $\simeq 4\times 10^{48}$ erg ${\mathrm{s}}^{-1}$. Rapid $\gamma$-ray variability with doubling time of 2-3 hours has been detected. Such a short doubling timescale has been detected for only a few bright blazars and indicates a location of $\gamma$-ray emission inside the broad line region. Together with the bluer-when-brighter $\gamma$-ray spectra, the variability phenomena could be well explained by the classic flat-spectrum radio quasar variability model that includes a fast injection of accelerated electrons and the external Compton cooling process.

arXiv commentAccepted for publication in New Astronomy

References in corpus (36)

• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Unified Schemes for Radio-Loud Active Galactic Nuclei
• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• Fermi Large Area Telescope Second Source Catalog
• An Exceptional VHE Gamma-Ray Flare of PKS 2155-304
• The Second Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
• Blazars in the Fermi Era: The OVRO 40-m Telescope Monitoring Program
• Variable VHE gamma-ray emission from Markarian 501
• CRATES: An All-Sky Survey of Flat-Spectrum Radio Sources
• The First Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
• The Non-Linear Dependence of Flux on Black Hole Mass and Accretion Rate in Core Dominated Jets
• MAGIC discovery of VHE Emission from the FSRQ PKS 1222+21
• CGRaBS: An All-Sky Survey of Gamma-Ray Blazar Candidates
• Implications of very rapid TeV variability in blazars
• A Universal Scaling for the Energetics of Relativistic Jets From Black Hole Systems
• Multiwavelength Observations of a Dramatic High Energy Flare in the Blazar 3C 279
• GeV breaks in blazars as a result of gamma-ray absorption within the broad-line region
• The Deep X-ray Radio Blazar Survey (DXRBS). I. Methods and First Results
• Location of gamma-ray Flare Emission in the Jet of the BL Lacertae Object OJ287 more than 14pc from the Central Engine
• Constraining the location of the emitting region in Fermi blazars through rapid gamma-ray variability
• Detection of significant cm to sub-mm band radio and gamma-ray correlated variability in Fermi bright blazars
• An Intense Gamma-Ray Flare of PKS1622-297
• Very Rapid High-Amplitude Gamma-ray Variability in Luminous Blazar PKS 1510-089 Studied with Fermi-LAT
• PKS 1502+106: a new and distant gamma-ray blazar in outburst discovered by the Fermi Large Area Telescope
• Search for the shortest variability at gamma rays in flat-spectrum radio quasars
• Modeling the production of flares in $\gamma$-ray quasars
• Rapid TeV Gamma-Ray Flaring of BL Lacertae
• Locating the gamma-ray emission region of the flat spectrum radio quasar PKS 1510-089
• The curvature of spectral energy distribution of blazars
• Fermi-LAT observations of the exceptional gamma-ray outbursts of 3C 273 in September 2009
• Contemporaneous VLBA 5 GHz Observations of LAT-Detected Blazars
• Fermi LAT detection of extraordinary variability in the gamma-ray emission of the blazar PKS 1510-089
• Fermi/LAT discovery of gamma-ray emission from the flat-spectrum radio quasar PKS 1454-354
• Variability of gamma-ray emission from blazars on the black hole timescales
• Blazar Anti-Sequence of Spectral Variation within individual Blazars: Cases for Mrk 501 and 3C 279
• The First IRAM/PdBI Polarimetric Millimeter Survey of Active Galactic Nuclei. I. Global Properties of the Sample

Cited by in corpus (9)

• A $\gamma$-ray Quasi-Periodic modulation in the Blazar PKS 0301$-$243?
• X-ray spectral studies of TeV gamma-ray emitting blazars
• Fast $\gamma$-ray variability in blazars beyond redsift 3
• Discovery of $\gamma$-ray emission from the radio-intermediate quasar III Zw 2: violent jet activity with intraday $\gamma$-ray variability
• Swift/XRT view on S5 0716+714 during a flare
• The Intrinsic $\gamma$-ray Emissions of $Fermi$ Blazars
• The flat-spectrum radio quasar 3C 345 from the high to the low emission state
• Discovery of gamma-ray emission from a strongly lobe-dominated quasar 3C 275.1
• Constraining X-ray emission in HBL blazars using multiwavelength observations