45 citations · 596 across the 44 of their papers we have counts for
29 papers · 1 filter
Modeling multiband SEDs and light curves of BL Lacertae using a time-dependent shock-in-jet model
Rukaiya Khatoon, Markus Boettcher, Raj Prince
The origin of fast flux variability in blazars is a long-standing problem, with many theoretical models proposed to explain it. In this study, we focus on BL Lacertae to model its…
Origin of the broadband emission from the transition blazar B2 1308+326
Ashwani Pandey, Pankaj Kushwaha, Paul J. Wiita +3
Transition blazars exhibit a shift from one subclass to the next during different flux states. It is therefore crucial to study them to understand the underlying physics of blazars…
Probing the disc-jet coupling in S4 0954+65, PKS 0903-57, & 4C +01.02 with -rays
Ajay Sharma, Sushanth Reddy Kamaram, Raj Prince +2
We present a comprehensive variability study on three blazars, S4 0954+65, PKS 0903-57, and 4C +01.02 covering a mass range of log(M/M) = 8--9, by using 15 years-lo…
Multi-wavelength temporal and spectral study of PKS 0402-362
Avik kumar Das, Sandeep Kumar Mondal, Raj Prince
We study the long-term behavior of the bright gamma-ray blazar PKS 0402-362. Over a span of approximately 12.5 years, from August 2008 to January 2021, we gathered Fermi-LAT tempor…
Quasi-periodic oscillation detected in -rays in blazar PKS 0346-27
Raj Prince, Anuvab Banerjee, Ajay Sharma +3
We present a variability study of the blazar PKS 0346-27 from December 2018 to January 2022 in its archival -ray observation by Fermi-LAT. We use the Lomb-Scargle periodogram an…
Gamma-ray flares and broadband spectral study of PKS 0402-362
Avik Kumar Das, Sandeep Kumar Mondal, Raj prince
We study the long-term behavior of the bright gamma-ray blazar PKS 0402-362. We collected approximately 13 years of Fermi-LAT data between Aug 2008 to Jan 2021 and identified three…
Dissecting the broadband emission from γ-ray blazar PKS 0735+178 in search of neutrinos
Raj Prince, Saikat Das, Nayantara Gupta +2
The origin of the diffuse flux of TeV-PeV astrophysical neutrinos is still unknown. The -ray blazar PKS 0735+178, located outside the 90\% localization region at 2.2 deg from th…
Multi-wavelength study of TeV blazar 1ES 1218+304 using gamma-ray, X-ray and optical observations
Rishank Diwan, Raj Prince, Aditi Agarwal +6
We report the multi-wavelength study for a high-synchrotron-peaked BL Lac 1ES 1218+304 using near-simultaneous data obtained during the period from January 1, 2018, to May 31, 2021…
The detection of possible transient Quasi-Periodic Oscillations in the -ray light curve of PKS 0244-470 and 4C+38.41
Avik Kumar Das, Raj Prince, Alok C. Gupta +1
The continuous monitoring capability of Fermi-LAT has enabled the exploration of Quasi-Periodic Oscillations (QPOs) in the -ray light curve of blazar that has given a new perspe…
Multiwavelength temporal and spectral study of TeV blazar 1ES 1727+502 during 2014 to 2021
Raj Prince, Rukaiya Khatoon, Pratik Majumdar +2
One of the most important questions in blazar physics is the origin of broadband emission and fast-flux variation. In this work, we studied the broadband temporal and spectral prop…
Multi-frequency Variability Study of Flat-Spectrum Radio Quasar PKS 0346-27
Sushanth Reddy Kamaram, Raj Prince, Suman Pramanick +1
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 (gam…
Multi-wavelength temporal and spectral analysis of Blazar S5 1803+78
Shruti Priya, Raj Prince, A. Agarwal +3
Blazars are a class of AGN, one of their jets is pointed towards the earth. Here, we report about the multi-wavelength study for blazar S5 1803+78 between MJD 58727 to MJD 59419. W…
Broadband Spectro-temporal Study on Blazar TXS 1700+685
Anuvab Banerjee, Prantik Nandi, Raj Prince +2
We attempt to present a multiwavelength variability and correlation study as well as detailed multi-waveband spectral characteristics of the May 2021 -ray flare of the blazar so…
Multi wavelength study of 4C+28.07
Avik Kumar Das, Raj Prince, Nayantara Gupta
4C+28.07 is a -ray Flat Spectrum Radio Quasar (FSRQ) type source. It is often monitored at different frequencies, though long-term multi-wavelength data of this source have not…
Broadband Modeling of Low Luminosity Active Galactic Nuclei Detected in Gamma Rays
Gunjan Tomar, Nayantara Gupta, Raj Prince
Low luminosity active galactic nuclei are more abundant and closer to us than the luminous ones but harder to explore as they are faint. We have selected the four sources NGC 315,…
Spectral Modeling of Flares in Long Term Gamma-Ray Light Curve of PKS 0903-57
Sandeep Kumar Mondal, Raj Prince, Nayantara Gupta +1
A detailed study of the BL Lacertae PKS 0903-57 has been done for the first time with 12 years of Fermi Large Area Telescope data. We have identified two bright gamma-ray flares in…
Multi-wavelength Analysis and Modeling of OJ 287 During 2017-2020
Raj Prince, Aditi Agarwal, Nayantara Gupta +4
Context. The blazar OJ 287 has been proposed as a binary black hole system based on its periodic optical outburst. Among blazars with parsec scale jets, the black hole binary syste…
A comprehensive study of 2019-2020 flare of OJ 287 using AstroSat, Swift, and NuSTAR
Raj Prince, Gayathri Raman, Rukaiya Khatoon +5
OJ 287 is a well-studied binary black hole system, that occasionally exhibits bright X-ray and optical flares. Here we present a detailed spectral study of its second brightest X-r…
Broadband study of BL Lac during flare of 2020: Spectral evolution and emergence of HBL component
Raj Prince
BL Lacertae (BL Lac) is categorized as TeV blazar and considered as a possible source of astrophysical neutrinos. In 2020, the brightest X-ray flare ever detected from it. A detail…
Temporal and spectral study of PKS 0208-512 during the 2019-2020 flare
Rukaiya Khatoon, Raj Prince, Zahir Shah +2
We present the temporal and spectral study of blazar PKS 0208-512, using recent flaring activity from November 2019 to May 2020, as detected by the Fermi-LAT observatory. The conte…
Study of Temporal and Spectral variability for Blazar PKS 1830-211 with Multi-Wavelength Data
Jayant Abhir, Raj Prince, Jophin Joseph +2
A study of the gravitationally lensed blazar PKS 1830-211 was carried out using multi waveband data collected by Fermi-LAT, Swift-XRT and Swift-UVOT telescopes between MJD 58400 to…
Broadband study of OQ 334 during its flaring state
Raj Prince, Rukaiya Khatoon, C. S. Stalin
The blazar OQ 334 displayed a γ-ray flare in 2018, after being in the long quiescent γ-ray state since 2008. Subsequent to the flare, the source was in a higher γ-ray flux state an…
Gamma-Ray Flares in Long Term Light Curve of 3C 454.3
Avik Kumar Das, Raj Prince, Nayantara Gupta
3C 454.3 is frequently observed in flaring state. The long term light curve of this source has been analysed with 9 year (August 2008 - July 2017) data from Fermi LAT detector. We…
Correlation of highly variable blazars with TeV IceCube track events
R. Moharana, P. Majumdar, P. P. Basumallick +3
The first ever identification of a cosmic ray accelerator as the consequence of spacial and temporal correlation of IceCube event 170922A with flaring of a blazar TXS 0506+056 moti…