Multi-frequency Variability Study of Flat-Spectrum Radio Quasar PKS 0346-27
arXiv:2205.04719 · doi:10.1093/mnras/stad167
Abstract
We have presented a multiwavelength temporal and spectral study of the Blazar PKS 0346-27 for the period 2019 January-2021 December (MJD 58484-59575) using data from Fermi-LAT (gamma-rays), Swift-XRT (X-rays) and Swift-UVOT (ultra-violet and optical). We identified multiple flaring episodes by analyzing the gamma-ray light curve generated from the Fermi-LAT data over a two-year period. The light curves of these individual gamma-ray flares with one-day binning were then modeled using a sum-of-exponentials fit. We found the minimum variability times for the gamma-ray light curve to be 1.34 +\- 0.3 days and a range of 0.1-3.2 days for the Swift wavelengths suggesting the compactness of the source. The broadband emission mechanism was studied by modeling the simultaneous multi-waveband Spectral Energy Distributions (SED) using the one-zone leptonic emission mechanism. We found that the optical-UV and X-ray data can be explained by the synchrotron and Synchrotron Self-Compton (SSC) emissions. However, the disk component of the External Compton radiation is dominant at higher energies with contributions from the EC broad line region component and SSC. Further, we performed a power spectral density (PSD) analysis with data from the gamma-ray light curve using the power spectrum response (PSRESP) method. With the power law model, a best-fit slope of 2.15 +\- 0.87 was found. This source could be a promising target for upcoming CTA for its harder spectrum at lower energies (tens of GeV).
References in corpus (55)
- Unified Schemes for Radio-Loud Active Galactic Nuclei
- The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
- Fermi Large Area Telescope Fourth Source Catalog
- Fermi Large Area Telescope Second Source Catalog
- Fermi Large Area Telescope First Source Catalog
- On characterising the variability properties of X-ray light curves from active galaxies
- The Spectral Energy Distribution of Fermi bright blazars
- An Exceptional VHE Gamma-Ray Flare of PKS 2155-304
- Leptonic and Hadronic Modeling of Fermi-Detected Blazars
- Canonical high power blazars
- Measuring the broadband power spectra of active galactic nuclei with RXTE
- Doppler factors, Lorentz factors and viewing angles for quasars, BL Lacertae objects and radio galaxies
- Roma-BZCAT: A multifrequency catalogue of Blazars
- Constraining Emission Models of Luminous Blazar Sources
- Gamma-ray Light Curves and Variability of Bright Fermi-Detected Blazars
- The VLBA Calibrator Survey - VCS1
- Swift observations of the very intense flaring activity of Mrk 421 during 2006: I. Phenomenological picture of electron acceleration and predictions for the MeV/GeV emission
- Stochastic Acceleration and the Evolution of Spectral Distributions in SSC Sources: A Self Consistent Modeling of Blazars' Flares
- Spectral Properties of Bright Fermi-detected Blazars in the Gamma-ray Band
- Fermi Gamma-ray Space Telescope Observations of the Gamma-ray Outburst from 3C 454.3 in November 2010
- Correlated Multi-Waveband Variability in the Blazar 3C~279 from 1996 to 2007
- Fermi Gamma-ray Space Telescope Observations of Recent Gamma-ray Outbursts from 3C 454.3
- A method for the estimation of the significance of cross-correlations in unevenly sampled red-noise time series
- Absorption of 10--200 Gev Gamma Rays by Radiation from BLR in Blazars
- Similarity of the Optical-IR and Gamma-Ray Time Variability of Fermi Blazars
- The awakening of BL Lacertae: observations by Fermi, Swift, and the GASP-WEBT
- Long-term optical monitoring of TeV emitting Blazars
- Characterizing the Gamma-Ray Variability of the Brightest Flat Spectrum Radio Quasars Observed with the Fermi LAT
- Very-high-energy gamma-rays from the Universe's middle age: detection of the z=0.940 blazar PKS 1441+25 with MAGIC
- Radiation fields of disk, BLR and torus in quasars and blazars: implications for gamma-ray absorption
- The second catalog of flaring gamma-ray sources from the Fermi All-sky Variability Analysis
- Radio-emitting narrow-line Seyfert 1 galaxies in the JVLA perspective
- Detection of very high energy gamma-ray emission from the gravitationally-lensed blazar QSO B0218+357 with the MAGIC telescopes
- Stochastic Modeling of the Fermi/LAT Gamma-ray Blazar Variability
- Stochastic modeling of multiwavelength variability of the classical BL Lac object OJ 287 on timescales ranging from decades to hours
- Locating the gamma-ray emission site in Fermi/LAT blazars from correlation analysis between 37 GHz radio and gamma-ray light curves
- Fourier Analysis of Blazar Variability
- X-ray spectra, light-curves and SEDs of blazars frequently observed by Swift
- Fermi-LAT Observations of the 2014 May-July outburst from 3C 454.3
- Gamma-ray Flux Distribution and Non-linear behavior of Four LAT Bright AGNs
- Characteristic Variability Timescales in the Gamma-ray Power Spectra of Blazars
- MAXI investigation into the longterm X-ray variability from the very-high-energy gamma-ray blazar Mrk 421
- Time series analysis of gamma-ray blazars and implications for the central black-hole mass
- Long-term optical variability of PKS 2155-304
- Multi-wavelength variability study of the classical BL Lac object PKS 0735+178 on timescales ranging from decades to minutes
- Possible Accretion Disk Origin of the Emission Variability of a Blazar Jet
- Long term study of the light curve of PKS 1510-089 in GeV energies
- Multiwavelength variability power spectrum analysis of the blazars 3C 279 and PKS 1510-089 on multiple timescales
- Particle diffusion and localized acceleration in inhomogeneous AGN jets - Part II: stochastic variation
- Blazar variability power spectra from radio up to TeV photon energies: Mrk 421 and PKS 2155-304
- Blazar Variability: A Study of Non-stationarity and the Flux-RMS Relation
- Constraints on the location of -ray emitting region for a sample of blazars with radio core-shift measurements
- Ground-based gamma-ray astronomy: history and development of techniques
- TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional Sources
- The large gamma-ray flare of the FSRQ PKS 0346-27