17 citations · 103 across the 22 of their papers we have counts for
22 papers
High-redshift GRB 140304A at z = 5.282 with flaring activity: A multi-wavelength study
Shashi. B. Pandey, Amit. K. Ror, A. J. Castro-Tirado +48
Context. This article presents a detailed multi-wavelength analysis of GRB 140304A at z = 5.282, having uncommon late-time flaring features. The aim is to study GRB 140304A and oth…
Investigating Temporal Features in Swift GRB Afterglows: A Comparative Study of UVOT and XRT Data
Amit K. Ror, S. B. Pandey, S. R. Oates +4
This study presents a statistical analysis of optical light curves (LCs) of 200 UVOT-detected GRBs from 2005 to 2018. We have categorised these LCs based on their distinct morpholo…
Extremely luminous optical afterglow of an energetic gamma-ray burst GRB 230204B
Rahul Gupta, Judith Racusin, Vladimir Lipunov +47
Robotic telescope networks play an important role in capturing early and bright optical afterglows, providing critical insights into the energetics and emission mechanisms of GRBs.…
X-ray and gamma-ray timing of GRB 180720B, GRB 181222B, GRB 211211A and GRB 220910A observed with Fermi and ASIM
M. D. Caballero-Garcia, E. Gogus, J. Navarro-Gonzalez +20
We present a timing study of the gamma and X-ray observations and analysis of a sample of bright gamma-ray bursts (GRBs; i.e. GRB 180720B, GRB 181222B, GRB 211211A and GRB 220910A)…
The core collapse of a 16.5 M star
Amar Aryan, Shashi Bhushan Pandey, Rahul Gupta +2
We investigate the 1D stellar evolution of a 16.5 M zero-age main-sequence star having different initial rotations. Starting from the pre-main-sequence, the models evolve…
Prompt and afterglow analysis of the Fermi-LAT detected GRB 230812B
Amit K. Ror, S. B. Pandey, A. Aryan +2
Prompt emission of GRB 230812B stands out as one of the most luminous events observed by both the Fermi-GBM and LAT. Prompt emission spectral analysis (both time-integrated and res…
An Intermediate Luminosity GRB 210210A: The early onset of the external forward shock in the X-ray?
Rahul Gupta, A. K. Ror, S. B. Pandey +5
We have analyzed the prompt and afterglow characteristics of the intermediate luminosity burst ``GRB 210210A". Our prompt emission analysis indicates that GRB 210210A is among the…
Magnetar central engine powering the energetic GRB 210610B ?
Amit Kumar Ror, Shashi B. Pandey, Rahul Gupta +1
The bright GRB 210610B was discovered simultaneously by Fermi and Swift missions at redshift 1.13. We utilized broadband Fermi-GBM observations to perform a detailed prompt emissio…
Exploring Origin of Ultra-Long Gamma-ray Bursts: Lessons from GRB 221009A
Amit Kumar Ror, Rahul Gupta, Amar Aryan +4
The brightest Gamma-ray burst (GRB) ever, GRB 221009A, displays ultra-long GRB (ULGRB) characteristics, with a prompt emission duration exceeding 1000 s. To constrain the origin an…
A detailed time-resolved and energy-resolved spectro-polarimetric study of bright GRBs detected by AstroSat CZTI in its first year of operation
Rahul Gupta, S. B. Pandey, S. Gupta +11
The radiation mechanism underlying the prompt emission remains unresolved and can be resolved using a systematic and uniform time-resolved spectro-polarimetric study. In this paper…
Revealing characteristics of dark GRB 150309A: dust extinguished or high-z?
A. J. Castro-Tirado, Rahul Gupta, S. B. Pandey +28
Dark GRBs constitute a significant fraction of the GRB population. In this paper, we present the multiwavelength analysis of an intense two-episodic GRB 150309A observed early on t…
A LOFAR prompt search for radio emission accompanying X-ray flares in GRB 210112A
A. Hennessy, R. L. C. Starling, A. Rowlinson +14
The composition of relativistic gamma-ray burst (GRB) jets and their emission mechanisms are still debated, and they could be matter or magnetically dominated. One way to distingui…
Recent observations of peculiar Gamma-ray bursts using 3.6 m Devasthal Optical Telescope (DOT)
Rahul Gupta, S. B. Pandey, Amit K. Ror +2
India has been actively involved in the follow-up observations of optical afterglows of gamma-ray bursts (GRBs) for more than two decades, using the country's meter-class facilitie…
Evolution and Final Fates of a Rotating 25 M Pop III star
Amar Aryan, Shashi Bhushan Pandey, Rahul Gupta +2
In this proceeding, we present the 1-dimensional stellar evolution of two rotating population III (Pop III) star models, each having a mass of 25 M at the zero-age main-s…
Evolution of Rotating 25 M Population III star: Physical Properties and Resulting Supernovae
Amar Aryan, Shashi Bhushan Pandey, Rahul Gupta +1
In this Letter, we report the outcomes of 1-D modelling of a rotating 25 M zero-age main-sequence Population III star up to the stage of the onset of core collapse. Rapid…
Prompt emission and early optical afterglow of VHE detected GRB 201015A and GRB 201216C: onset of the external forward shock
Amit Kumar Ror, Rahul Gupta, Martin Jelínek +19
We present a detailed prompt emission and early optical afterglow analysis of the two very high energy (VHE) detected bursts GRB 201015A and GRB 201216C, and their comparison with…
SN 2016iyc: A Type IIb supernova arising from a low-mass progenitor
Amar Aryan, S. B. Pandey, WeiKang Zheng +12
In this work, photometric and spectroscopic analyses of a very low-luminosity Type IIb supernova (SN) 2016iyc have been performed. SN 2016iyc lies near the faint end among the dist…
Tale of GRB 171010A/SN 2017htp and GRB 171205A/SN 2017iuk: Magnetar origin?
Amit Kumar, Shashi B. Pandey, Rahul Gupta +4
We present late-time optical follow-up observations of GRB 171010A/SN 2017htp ( = 0.33) and low-luminosity GRB 171205A/SN 2017iuk ( = 0.037) acquired using the 4K4K C…
Analyses of Hydrogen-stripped core-collapse supernovae using MOSFiT and MESA based tools
Amar Aryan, Shashi Bhushan Pandey, Amit Kumar +4
In this work, we employ two publicly available analysis tools to study four hydrogen(H)--stripped core--collapse supernovae (CCSNe) namely, SN 2009jf, iPTF13bvn, SN 2015ap, and SN…
Photometric studies on the host galaxies of gamma-ray bursts using 3.6m Devasthal Optical Telescope
Rahul Gupta, Shashi Bhushan Pandey, Amit Kumar +6
In this article, we present multi-band photometric observations and analysis of the host galaxies for a sample of five interesting gamma-ray bursts (GRBs) observed using the 3.6m D…
Multi-wavelength study of the luminous GRB 210619B observed with Fermi and ASIM
M. D. Caballero-García, Rahul Gupta, S. B. Pandey +28
We report on detailed multi-wavelength observations and analysis of the very bright and long GRB 210619B, detected by the Atmosphere-Space Interactions Monitor (ASIM) installed on…
The long-active afterglow of GRB 210204A: Detection of the most delayed flares in a Gamma-Ray Burst
Harsh Kumar, Rahul Gupta, Divita Saraogi +22
We present results from extensive broadband follow-up of GRB 210204A over the period of thirty days. We detect optical flares in the afterglow at 7.6 x 10^5 s and 1.1 x 10^6 s afte…