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 (19)
- Doppler factors, Lorentz factors and viewing angles for quasars, BL Lacertae objects and radio galaxies
- Roma-BZCAT: A multifrequency catalogue of Blazars
- Correlated Multi-Waveband Variability in the Blazar 3C~279 from 1996 to 2007
- A method for the estimation of the significance of cross-correlations in unevenly sampled red-noise time series
- Stochastic Modeling of the Fermi/LAT Gamma-ray Blazar Variability
- 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
- Gamma-ray Flux Distribution and Non-linear behavior of Four LAT Bright AGNs
- MAXI investigation into the longterm X-ray variability from the very-high-energy gamma-ray blazar Mrk 421
- Multi-wavelength variability study of the classical BL Lac object PKS 0735+178 on timescales ranging from decades to minutes
- Long-term optical variability of PKS 2155-304
- 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
- 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
- The large gamma-ray flare of the FSRQ PKS 0346-27