The gamma-ray and Optical Variability Analysis of the BL Lac Object 3FGL J0449.4-4350

Abstract

We have assembled the historical light curves of the BL Lac Object 3FGL J0449.4-4350 at optical and gamma-ray bands, the time spanning about 10 years, analyzed the periodic variability of the light curves by using four different methods (Lomb-Scargle periodogram, REDFIT38, Jurkevich and DACF). We detected a marginally possible quasi-periodic oscillation (QPO) of ~450 days. Assuming it originates from the helical motion jet in a supermassive binary black hole (SMBBH) system undergoing major merger, we estimate the primary black hole mass M~7.7*10^{9} M_sun. To explore the origin of the gamma-ray, we investigated the optical-gamma-ray correlations using discrete correlation function (DCF) method, and found that the correlation between the two bands is very significant. This strong correlation tends to imply lepton self-synchro-Compton (LSSC) model to produce the gamma-ray.

19 pages, 6 figures, 2 tables, Accepted for publication in PASP

References in corpus (10)

• The generalised Lomb-Scargle periodogram. A new formalism for the floating-mean and Keplerian periodograms
• A possible close supermassive black-hole binary in a quasar with optical periodicity
• A Universal Scaling for the Energetics of Relativistic Jets From Black Hole Systems
• A model for periodic blazars
• Revisiting Quasi-Periodic modulation in $\gamma$-ray Blazar PKS 2155-304 with Fermi Pass 8 data
• Harmonic QPOs and Thick Accretion Disk Oscillations in BL Lac Object AO 0235+164
• A $\gamma$-ray Quasi-Periodic modulation in the Blazar PKS 0301$-$243?
• Multiband optical variability of the blazar OJ 287 during its outbursts in 2015 -- 2016
• Evolution of Supermassive Black Hole Binary and Acceleration of Jet Precession in Galactic Nuclei
• Optical quasi-periodic oscillation of the BL Lacertae object S5 0716+714 during the faint state

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• Multicolour Optical Variability Monitoring of Blazars with High Time Resolution
• A QPO in Mkn 421 from Archival RXTE Data
• Long-term multi-wavelength variations of Fermi blazar 3C 279
• Optical Monitoring and Long-term Optical Spectral Variability of BL Lacertae Object S5 0716+714