Optical quasi-periodic oscillation of the BL Lacertae object S5 0716+714 during the faint state

Abstract

In order to search for the evidence of quasi-periodic oscillation (QPO) in blazar, multicolor optical observations of the BL Lacertae object S5 0716+714 were performed from 2005 to 2012. For $I$ band on March 19 2010 with low variability amplitude and low flux level, the same quasi-periodic oscillation $\simeq 50$ minutes with 99% significance levels is confirmed by ZDCF method, Lomb-Scargle method, REDFIT and fitting sinusoidal curves. The observed QPO is likely to be explained by accretion disk variability. If the observed QPO indicates an innermost stable orbital period from the accretion disk, the QPO $\simeq 50$ min corresponds to a black hole mass of $5.03\times 10^6{M}_{\odot }$ for a non-rotating Schwarzschild black hole and $3.2\times 10^7{M}_{\odot }$ for a maximally rotating Kerr black hole.

arXiv comment29 pages, 3 figures, 6 tables, accepted for publication in AJ

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• Multiwavelength periodicity search in a sample of $\gamma$-ray bright blazars
• Searching for Quasi-Periodic Modulations in $\gamma$-ray Active Galactic Nuclei
• Statistical analysis of micro-variability properties of the blazar S5 0716+714
• The gamma-ray and Optical Variability Analysis of the BL Lac Object 3FGL J0449.4-4350
• A geometrical interpretation for the properties of multiband optical variability of the blazar S5 0716+714
• A 31.3 day Transient Quasiperiodic Oscillation in Gamma-ray Emission from Blazar S5 0716+714
• Optical variability in IBL S5 0716+714 during the 2013-2015 outburst
• Intra-day optical multi-band quasi-simultaneous observation of BL Lacertae object S5 0716+714 from 2013 to 2016
• Multicolour Optical Variability Monitoring of Blazars with High Time Resolution
• Multi-wavelength temporal variability of the blazar PKS 1510-089
• A QPO in Mkn 421 from Archival RXTE Data
• Investigating Optical Variability of the Blazar S5 0716+714 On Diverse Time-scales
• About 300 days optical quasi-periodic oscillations in the long-term light curves of the blazar PKS 2155-304
• Optical Monitoring and Long-term Optical Spectral Variability of BL Lacertae Object S5 0716+714
• Multi-wavelength variability analysis of the blazar S5 0716+714 during a long-lasting period of low activity
• Variability Study and Searching for QPOs with day-like periods in the blazar S5 0716+714 with TESS