34 citations · 187 across the 26 of their papers we have counts for
28 papers
Dynamical chiral symmetry breaking in rotating QED: critical flavor number and the occupation-reweighting channel
Wei Li
We study dynamical chiral symmetry breaking in -dimensional QED on a rigidly rotating disc, , within the rainbow Schwinger--Dyson framework. At zero temperature the…
Unveiling the Accretion Architecture of GS 1354--64: A Broadband X-ray and Polarimetric Study of its 2025--2026 Outburst
Kaushik Chatterjee
A comprehensive multi-satellite analysis of the dynamically confirmed black hole candidate GS 1354-64 during its highly active 2025-2026 outburst is presented. Leveraging simultane…
SN 2025aico: Early observations of a faint Type IIb supernova with a low-mass envelope
J. -W. Zhao, A. Pastorello, B. Kumar +45
We aimed to investigate the physical properties and the underlying explosion mechanisms of the Type IIb SN 2025aico. Through a comprehensive analysis of early-phase optical light c…
Revisiting the 2021 Outburst of the BHC MAXI J1803-298 Using NICER, NuSTAR, and Insight-HXMT Data
Kaushik Chatterjee, Sujoy K. Nath
We present a broadband spectral and timing study of the black hole candidate MAXI J1803-298 during its 2021 outburst using simultaneous observations from NICER, NuSTAR, and Insight…
Bridging X-ray Polarization with Timing & Spectroscopic Parameters of a galactic black hole: Swift J1727.8-1613
Arka Chatterjee, Sujoy K. Nath, Kaushik Chatterjee +5
We report the discovery of a correlated energy-dependent time lag and degree of polarization for Swift J1727.8-1613 during its 2023 outburst. The energy-dependent time lag is measu…
Multi-wavelength study of EP250416a / GRB 250416C: An Optically Dark Long GRB with a Late Jet Break
Guoying Zhao, Duo-Le Cao, Rong-Feng Shen +29
We present multi-wavelength study of the /X-ray transient EP250416a (also designated GRB 250416C), triggered by the Einstein Probe (EP) Wide-field X-ray Telescope and also by SV…
Distinct Fe-K Line Complexes in MAXI J1744-294 Revealed by XRISM High-Resolution Spectroscopy
Kaushik Chatterjee, Santanu Mondal, Biswaraj Palit +7
The newly discovered Galactic transient MAXI J1744-294 went into its first X-ray outburst in 2025. We study the spectral properties of this source in the 2-10 keV energy band durin…
SN 2024aecx: A double-peaked rapidly evolving Type IIb supernova at 11 Mpc
Xingzhu Zou, Brajesh Kumar, Rishabh Singh Teja +28
We present the results of low-resolution spectroscopic and densely sampled multi-band photometric follow-up of supernova (SN) 2024aecx. The SN was discovered in the spiral galaxy N…
Detection of QPO Soft Lag during Outburst of Swift J1727.8-1613: Estimation of Instrinsic Parameters from Spectral Study
Dipak Debnath, Sujoy Kumar Nath, Debjit Chatterjee +2
The recently discovered bright transient black hole candidate Swift J1727.8-1613 is studied in a broad energy range ( keV) using combined NICER and NuSTAR data on 29 August…
Interpreting the Spectro-Temporal Properties of the Black Hole Candidate Swift J151857.0-572147 during its First Outburst in 2024
Kaushik Chatterjee, S. Pujitha Suribhatla, Santanu Mondal +1
The transient Galactic black hole candidate Swift J151857.0-572147 went through an outburst in March 2024 for the first time. Using publicly archived {\it Insight}-HXMT data, we ha…
Early-phase simultaneous multiband observations of the Type II supernova SN 2024ggi with Mephisto
Xinlei Chen, Brajesh Kumar, Xinzhong Er +24
We present early-phase good-cadence (hour-to-day) simultaneous multiband ( and bands) imaging of the nearby supernova SN~2024ggi, which exploded in the nearby galaxy, NG…
{\it Insight}-HXMT View of the BHC Swift J1727.8-1613 during its outburst in 2023
Kaushik Chatterjee, Santanu Mondal, Chandra B. Singh +1
The transient Galactic black hole candidate Swift\,J1727.8-1613 went through an outburst for the very first time in August 2023 and lasted for almost 6 months. We study the timing…
The first detection of X-ray polarization in a newly discovered Galactic transient Swift\,J151857.0-572147
Santanu Mondal, S. Pujitha Suribhatla, Kaushik Chatterjee +2
We study the spectro-polarimetric properties of a newly discovered black hole X-ray binary Swift\,J151857.0-572147 jointly using {\it IXPE} and {\it NuSTAR} observations during Mar…
MAXI J0637-430: A Possible Candidate for Bulk Motion Comptonization?
Kaushik Chatterjee, Dipak Debnath, Sujoy Kumar Nath +1
The transient Galactic black hole candidate MAXI J0637-430 went through an outburst in 2019--20 for the very first time. This outburst was active for almost 6 months from November…
Accretion Flow Properties of EXO 1846-031 During its Multi-Peaked Outburst After Long Quiescence
Sujoy Kumar Nath, Dipak Debnath, Kaushik Chatterjee +3
We study the recent outburst of the black hole candidate EXO 1846-031 which went into an outburst in 2019 after almost 34 years in quiescence. We use archival data from Swift/XRT,…
Properties of MAXI J1348-630 during Its Second Outburst in 2019
Riya Bhowmick, Dipak Debnath, Kaushik Chatterjee +2
The newly discovered galactic black hole candidate (BHC) MAXI~J1348-630 showed two major outbursts in 2019, just after its discovery. Here, we provide a detailed spectral and tempo…
Properties of 2017-18 'failed' Outburst of GX 339-4
Dipak Debnath, Kaushik Chatterjee, Sujoy Kumar Nath +2
The Galactic transient black hole candidate GX 339-4 is a very interesting object to study as it showed both complete and failed types of outbursts. We studied both spectral and te…
Accretion Flow Properties of MAXI J1910-057/Swift J1910.2-0546 During Its 2012-13 Outburst
Sujoy Kumar Nath, Dipak Debnath, Kaushik Chatterjee +3
Galactic black hole candidate MAXI J1910-057/Swift J1910.2-0546 was simultaneously discovered by MAXI/GSC and Swift/BAT satellites during its first outburst in 2012. We study the d…
Anomalous nature of outbursts of the black hole candidate 4U 1630-472
Kaushik Chatterjee, Dipak Debnath, Riya Bhowmick +2
The Galactic black hole candidate (BHC) 4U~1630-472 has gone through several outbursts (13 to be particular) in the last two and a half decades starting from the RXTE era till date…
Accretion Properties of MAXI J1813-095 during its Failed Outburst in 2018
Arghajit Jana, Gaurava K. Jaisawal, Sachindra Naik +7
We present the results obtained from detailed timing and spectral studies of a black hole candidate MAXI~J1813-095 using {\it Swift}, {\it NICER}, and {\it NuSTAR} observations dur…
Jet Properties of XTE J1752-223 During its 2009-2010 Outburst
Dipak Debnath, Kaushik Chatterjee, Debjit Chatterjee +2
Galactic short orbital period black hole candidate (BHC) XTE~J1752-223 was discovered on 2009 Oct 21 by the Rossi X-ray Timing Explorer (RXTE). We study the spectral properties of…
Properties of Faint X-ray Activity of XTE J1908+094 in 2019
Debjit Chatterjee, Arghajit Jana, Kaushik Chatterjee +5
We study the properties of the faint X-ray activity of Galactic transient black hole candidate XTE~J1908+094 during its 2019 outburst. Here, we report the results of detailed spect…
Accretion Flow Properties of GRS 1716-249 during its 2016-17 'failed' Outburst
Kaushik Chatterjee, Dipak Debnath, Debjit Chatterjee +4
In , the Galactic transient black hole candidate GRS 1716-249 exhibited an outburst event after a long period of quiescence of almost 23 years. The source remained in the…
Relation Between Quiescence and Outbursting Properties of GX 339-4
Riya Bhowmick, Dipak Debnath, Kaushik Chatterjee +5
Galactic black hole candidate (BHC) GX~339-4 underwent several outbursting phases in the past two and a half decades at irregular intervals of years. Nature of these outburst…