The Variability and Period Analysis for the BL Lac AO 0235+164

Abstract

Variability is one of the extreme observational properties of BL Lacertae objects. AO 0235+164 is a well studied BL Lac through the whole electro-magnetic wavebands. In the present work, we show its optical R band photometric observations carried out during the period of Nov, 2006 to Dec. 2012 using the Ap6E CCD camera attached to the primary focus of the $70-\mathrm{cm}$ meniscus telescope at Abastumani Observatory, Georgia. It shows a large variation of $\Delta R$ = 4.88 mag (14.19 - 19.07 mag) and a short time scale of $\Delta T_v$ = 73.5 min during our monitoring period. During the period of Dec. 2006 to Nov. 2009, we made radio observations of the source using the 25-m radio telescope at Xinjiang Astronomical Observatory. When a discrete correlation function (DCF) is adopted to the optical and radio observations, we found that the optical variation leads the radio variation by 23.2$\pm$12.9 days.

arXiv commentAccepted by ApJ

References in corpus (48)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• Fermi Large Area Telescope Second Source Catalog
• Fermi Large Area Telescope First Source Catalog
• The Spectral Energy Distribution of Fermi bright blazars
• The Second Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
• The Connection between X-ray- and Radio-Selected BL Lacertae Objects
• The Third Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
• Doppler factors, Lorentz factors and viewing angles for quasars, BL Lacertae objects and radio galaxies
• Multi-Epoch VLBA Observations of EGRET-Detected Quasars and BL Lac Objects: Superluminal Motion of Gamma-Ray Bright Blazars
• A systematic search for close supermassive black hole binaries in the Catalina Real-Time Transient Survey
• A Population of Short-Period Variable Quasars from PTF as Supermassive Black Hole Binary Candidates
• Spectral energy distributions of a large sample of BL Lacertae objects
• Relativistic beaming and gamma-ray brightness of blazars
• Optical and radio variability of the BL Lac object AO 0235+16: a possible 5-6 year periodicity
• The WEBT BL Lac Campaign 2000
• The Spectral Energy Distributions of Fermi Blazars
• On the use of structure functions to study blazar variability: caveats and problems
• Historic Light Curve and Long-term Optical Variation of BL Lacertae 2200+420
• The awakening of BL Lacertae: observations by Fermi, Swift, and the GASP-WEBT
• Testing tests on AGN microvariability
• Helical jets in blazars. Interpretation of the multifrequency long-term variability of AO 0235+16
• Quasi-Periodic Oscillations of ~ 15 minutes in the Optical Light Curve of the BL Lac S5 0716+714
• A multifrequency analysis of radio variability of blazars
• The Outburst of the Blazar AO 0235+164 in 2006 December: Shock-in-Jet Interpretation
• Optical Flux and Spectral Variability of Blazars
• Intranight optical variability of Blazars
• Radio variability properties for radio sources
• Multi-band optical variability studies of BL Lacertae
• Multifrequency variability of the blazar AO 0235+164. The WEBT campaign in 2004-2005 and long-term SED analysis
• Nearly Periodic Fluctuations in the Long Term X-ray Light Curves of the Blazars AO 0235+164 and 1ES 2321+419
• Multi-wavelength observations of blazar AO 0235+164 in the 2008-2009 flaring state
• Ten-year optical monitoring of PKS 0735+178: historical comparison, multiband behaviour and variability timescales
• Radio-to-UV monitoring of AO 0235+164 by the WEBT and Swift during the 2006--2007 outburst
• Multi-color Near Infra-red Intra-day and Short Term Variability of the Blazar S5 0716+714
• Nature of Intra-night Optical Variability of BL Lacertae
• Optical Monitoring of BL Lacertae Object OJ 287: a 40-Day Period?
• Spectroscopic monitoring of the BL Lac object AO 0235+164
• Multi-band optical-NIR variability of blazars on diverse timescales
• Optical observations of BL Lacertae from 1997 to 1999
• The binary black hole scenario for the BL Lacertae object AO 0235+16
• The infrared and optical variability of OJ 287
• Multi-band Variability Analysis of Mrk 421
• Optical Photometrical Observations and Variability for Quasar 4C 29.45
• Optical and Radio Variability of BL Lacertae
• Optical flux behaviour of a sample of Fermi blazars
• Estimating black hole masses of blazars
• Variability of OI 090.4
• Prominent Polarized Flares of the Blazars AO 0235+164 and PKS 1510-089

Cited by in corpus (9)

• Quasi-Periodic Oscillations in the long term radio light curves of the blazar AO 0235+164
• Multicolor Optical Monitoring of the Blazar S5 0716+714 from 2017 to 2019
• Detection of a quasi-periodic oscillation in the optical light curve of the remarkable blazar AO 0235+164
• A comprehensive study on the variation phenomena of AO 0235+164
• Optical Quasi-periodic Oscillations in the TESS light curves of three blazars
• Multiwavelength variability of the blazar AO 0235+164
• Exploring TeV candidates of Fermi blazars through machine learning
• Study of variability in long-term multiwavelength optical lightcurves of blazar AO 0235+164
• Parsec-scale jet precession and a putative supermassive binary black hole system in the blazar AO 0235+164