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 arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/7840
ISSN:	0004-637X 1538-4357(Online)
Alternative Location:	https://ui.adsabs.harvard.edu/abs/2021ApJ...920..117D/abstract https://arxiv.org/abs/2107.10555 https://doi.org/10.3847/1538-4357/ac178c
Copyright:	2021, The American Astronomical Society
Appears in Collections:	Research Papers (A&A)

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