Please use this identifier to cite or link to this item:
Title: Multi-Wavelength Study of 4C+28.07
Authors: Das, Avik Kumar
Prince, Raj
Gupta, Nayantara
Issue Date: Oct-2021
Publisher: IOP Sciences for The American Astronomical Society
Citation: The Astrophysical Journal, 2021, Vol. 920, p117
Abstract: 4C+28.07 is a γ-ray flat-spectrum-radio-quasar-type source. It is often monitored at different frequencies, though long-term multi-wavelength data of this source have not been modeled in detail before. We have analyzed ∼12 yr (2008 August–2020 May) of Fermi-LAT data with a binning of 10 day timescale and observed three distinctive flaring states. Each flaring state consists of different phases of activity, namely, pre-flare, flare, and post-flare regions. γ-ray spectral analysis of these different activity phases has been performed and the best-fit model for its spectra is found to be a log-parabola model. We have also studied the correlation of simultaneous γ-ray light curves with the optical & radio counterparts in these flaring states and report the DCF with 95% significance level. A large time delay is found between radio and gamma-ray data for two flares, indicating two zones of emission. We have fitted the multi-wavelength data with a two-zone leptonic model. In our two-zone leptonic model the maximum required power in the jet is 9.64 × 1046 erg s−1, which is lower than its Eddington luminosity 2.29 × 1047 erg s−1.
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 0004-637X
Alternative Location:
Copyright: 2021, The American Astronomical Society
Appears in Collections:Research Papers (A&A)

Files in This Item:
File Description SizeFormat 
  Restricted Access
Restricted Access2.02 MBAdobe PDFView/Open Request a copy

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.