6 papers
Multi-zone Modeling of Blazar Jets: Constraints from GeV-Optical Correlation and Short-Timescale Variability
Arit Bala, Kaustav Mitra, Ritaban Chatterjee
We have developed a multi-zone model of blazar jet emission, in which the emission region contains many cells with individual magnetic fields and electron energy distributions. Non…
Location of a Sample of GeV and Optical Outbursts in the Jets of Blazars
Maitreya Kundu, Arit Bala, Saugata Barat +1
The exact location of the -ray emitting region in blazar jets has long been a matter of debate. However, the location has important implications about the emission processes, g…
Sub-Day Timescale X-ray Spectral Variability of the TeV Blazars Mrk 421 and 1ES 1959+650
Susmita Das, Ritaban Chatterjee
We present X-ray spectra ( keV) of two high synchrotron-peaked blazars Mrk 421 and 1ES 1959+650 from simultaneous observations by the SXT and LAXPC instruments onboard \tex…
Accretion Disc-Jet Decomposition from the Optical-Near Infrared Monitoring of Fermi Blazars
Garima Rajguru, Ritaban Chatterjee
We study the variability of the thermal (accretion disc) and non-thermal (jet) emission of thirteen flat spectrum radio quasars in the optical and near infrared (OIR) regime using…
Spectral Energy Distribution Modeling of BL Lacertae During a Large Submillimeter Outburst and Low X-Ray Polarization State
Ayon Mondal, Arijit Sar, Maitreya Kundu +2
In 2023 October-November, the blazar BL Lacertae underwent a very large-amplitude submm outburst. The usual single-zone leptonic model with the lower energy peak of the spectral en…
Spectral Energy Distribution Modeling of Broad Emission Line Quasars: From X-ray to Radio Wavelengths
Avinanda Chakraborty, Maitreya Kundu, Suchetana Chatterjee +4
We study the differences in physical properties of quasar-host galaxies using an optically selected sample of radio loud (RL) and radio quiet (RQ) quasars (in the redshift range 0.…