Quasi-simultaneous two band optical variability of the blazars 1ES 1959+650 and 1ES 2344+514

Abstract

We report the results of quasi-simultaneous two filter optical monitoring of two high-energy peaked blazars, 1ES 1959+650 and 1ES 2344+514, to search for microvariability and short-term variability (STV). We carried out optical photometric monitoring of these sources in an alternating sequence of B and R pass-bands, and have 24 and 19 nights of new data for these two sources, respectively. No genuine microvariability (intra-night variability) was detected in either of these sources. This non-detection of intra-night variations is in agreement with the conclusions of previous studies that high-energy peaked BL Lacs are intrinsically less variable than low-energy peaked BL Lacs in the optical bands. We also report the results of STV studies for these two sources between July 2009 and August 2010. Genuine STV is found for the source 1ES 1959+650 but not for 1ES 2344+514. We briefly discuss possible reasons for the difference between the intra-night variability behaviour of high- and low-energy peaked blazars.

20 pages, 6 figures, 7 Tables, accepted for publication in MNRAS

References in corpus (7)

• The First Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
• Testing tests on AGN microvariability
• Simultaneous multiwavelength observations of the blazar 1ES1959+650 at a low TeV flux
• The radio delay of the exceptional 3C 454.3 outburst. Follow-up WEBT observations in 2005-2006
• Observation of very high energy gamma-rays from the AGN 1ES 2344+514 in a low emission state with the MAGIC telescope
• Observation of VHE gamma-ray emission from the Active Galactic Nucleus 1ES1959+650 using the MAGIC telecope
• Multi-color Near Infra-red Intra-day and Short Term Variability of the Blazar S5 0716+714

Cited by in corpus (36)

• Optical Flux and Spectral Variability of Blazars
• Multi-band optical variability studies of BL Lacertae
• X-ray Intraday Variability of Five TeV Blazars with NuSTAR
• Multi-color optical monitoring of the quasar 3C 273 from 2005 to 2016
• On the reliability of microvariability tests in quasars
• Nature of Intra-night Optical Variability of BL Lacertae
• Multiband optical variability of the blazar OJ 287 during its outbursts in 2015 -- 2016
• Multi-wavelength Intra-day Variability and Quasi-periodic Oscillation in Blazars
• Characterizing optical variability of OJ 287 in 2016 - 2017
• The nature of the intra-night optical variability in blazars
• Optical Flux and Spectral Variability of the TeV blazar PG 1553+113
• X-ray Intra-day Variability of the TeV Blazar Mrk 421 with Suzaku
• Peak of spectral energy distribution play an important role in intra-day variability of Blazars?
• Optical Variability of TeV Blazars on long time-scales
• Multi-color optical monitoring of ten blazars from 2005 to 2011
• X-ray Intraday Variability of the TeV Blazar Mrk 421 with {\it Chandra}
• Intra-night optical flux and polarization variability of BL~Lacertae during its 2020 $-$ 2021 high state
• Optical and Radio Variability of BL Lacertae
• Search for Intra-day Optical Variability in $\gamma$-ray--loud Blazars S5 0716+714 and 3C 273
• Intra-night variability of the blazar CTA 102 during its 2012 and 2016 giant outbursts
• Violent intra-night optical variability of the blazar S4 0954+65 during its unprecedented 2015 February outburst
• Optical Variability of the TeV Blazar 1ES 0806+524 on Diverse Timescales
• Study of correlation between optical flux and polarization variations in BL Lac objects
• Optical Variability of Three Extreme TeV Blazars
• 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
• Optical flux and spectral variability of BL Lacertae during its historical high outburst in 2020
• Impact of seeing and host galaxy into the analysis of photo-polarimetric microvariability in blazars - Case study of the nearby blazars 1ES 1959+650 and HB89 2201+044
• Optical variability of a newly discovered blazar sample from the BZCAT Catalog
• Multi-band Optical Variability of the TeV Blazar PG 1553+113 in 2019
• Multi-Band Intra-Night Optical Variability of BL Lacertae
• Using the Markov Chain Monte Carlo method to study the physical properties GeV-TeV BL Lac objects
• Variability of OI 090.4
• Multi-band optical variability of the blazar OP 313 in the outburst state during 2024-2025
• Microvariability Detection of Mrk 421