Multiwavelength variability of BL Lacertae measured with high time resolution

ZR Weaver, KE Williamson, SG Jorstad… - The Astrophysical …, 2020 - iopscience.iop.org
In an effort to locate the sites of emission at different frequencies and physical processes
causing variability in blazar jets, we have obtained high time-resolution observations of BL …

Multiwaveband quasi-periodic oscillation in the blazar 3C 454.3

A Sarkar, AC Gupta, VR Chitnis… - Monthly Notices of the …, 2021 - academic.oup.com
We report the detection (> 4σ) of a quasi-periodic oscillation (QPO) in the gamma-ray light
curve of 3C 454.3 along with a simultaneous marginal QPO detection (> 2.4 σ) in the optical …

Detection of a quasi-periodic oscillation in γ-ray light curve of the high-redshift blazar B2 1520+ 31

AC Gupta, A Tripathi, PJ Wiita… - Monthly Notices of …, 2019 - academic.oup.com
We detected a possible quasi-periodic oscillation (QPO) of∼ 71 d in the 0.1–300 GeV γ-ray
Fermi-Large Area Telescope light curve of the high-redshift flat spectrum radio quasar B2 …

Gamma-ray flux distribution and nonlinear behavior of four LAT bright AGNs

P Kushwaha, A Sinha, R Misra, KP Singh… - The Astrophysical …, 2017 - iopscience.iop.org
We present a statistical characterization of the γ-ray emission from the four Fermi-LAT
sources: FR I radio galaxy NGC 1275, BL Lac Mrk 421, FSRQs B2 1520+ 31, and PKS 1510 …

Long-term variability and correlation study of the blazar 3C 454.3 in the radio, NIR, and optical wavebands

A Sarkar, VR Chitnis, AC Gupta, H Gaur… - The Astrophysical …, 2019 - iopscience.iop.org
We performed a long-term optical (B, V, R bands), infrared (J and K bands), and radio band
(15, 22, 37 GHz band) study of the flat spectrum radio quasar, 3C 454.3, using data collected …

Correlation between optical flux and polarization variations in flat-spectrum radio quasars on diverse time-scales

A Pandey, B Rajput, CS Stalin - Monthly Notices of the Royal …, 2022 - academic.oup.com
Study of the polarization behaviour in blazars is a powerful tool to discern the role of the
magnetic field in the variable emission process in their relativistic jets. We present here the …

A peculiar multiwavelength flare in the blazar 3C 454.3

AC Gupta, A Mangalam, PJ Wiita… - Monthly Notices of …, 2017 - academic.oup.com
Abstract The blazar 3C 454.3 exhibited a strong flare seen in γ-rays, X-rays and optical/near-
infrared bands during 2009 December 3–12. Emission in the V and J bands rose more …

Temporal correlation between the optical and γ-ray flux variations in the blazar 3C 454.3

B Rajput, CS Stalin, S Sahayanathan… - Monthly Notices of …, 2019 - academic.oup.com
Blazars show optical and γ-ray flux variations that are generally correlated, although there
are exceptions. Here we present anomalous behaviour seen in the blazar 3C 454.3 based …

Two-zone Emission Modeling of PKS 1510-089 during the High State of 2015

R Prince, N Gupta, K Nalewajko - The Astrophysical Journal, 2019 - iopscience.iop.org
PKS 1510-089 is one of the most variable blazars in the third Fermi-LAT source catalog.
During 2015, this source has shown four flares identified as flares A, B, C, and D in between …

The 2016 June Optical and Gamma-Ray Outburst and Optical Microvariability of the Blazar 3C 454.3

ZR Weaver, TJ Balonek, SG Jorstad… - The Astrophysical …, 2019 - iopscience.iop.org
Abstract The quasar 3C 454.3 underwent a uniquely structured multifrequency outburst in
2016 June. The blazar was observed in the optical R-band by several ground-based …