251 citations · 2.4k across the 47 of their papers we have counts for
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The Radio to GeV Afterglow of GRB 221009A
Tanmoy Laskar, Kate D. Alexander, Raffaella Margutti +27
GRB 221009A () is one of the closest known long -ray bursts (GRBs). Its extreme brightness across all electromagnetic wavelengths provides an unprecedented opportunity…
Connecting the early afterglow to the prompt GRB and the central engine in the striped jet model
Michail Damoulakis, Rodolfo Barniol Duran, Dimitrios Giannios
Despite a generally accepted framework for describing the Gamma-Ray Burst (GRB) afterglows, the nature of the compact object at the central engine and the mechanism behind the prom…
Decelerated sub-relativistic material with energy Injection
B. Betancourt Kamenetskaia, N. Fraija, M. Dainotti +3
We investigate the evolution of the afterglow produced by the deceleration of the non-relativistic material due to its surroundings. The ejecta mass is launched into the circumstel…
A theoretical model of an off-axis GRB jet
B. Betancourt Kamenetskaia, N. Fraija, M. Dainotti +3
In light of the most recent observations of late afterglows produced by the merger of compact objects or by the core-collapse of massive dying stars, we research the evolution of t…
Luminous Late-time Radio Emission from Supernovae Detected by the Karl G. Jansky Very Large Array Sky Survey (VLASS)
M. C. Stroh, G. Terreran, D. L. Coppejans +10
We present a population of 19 radio-luminous supernovae (SNe) with emission reaching in the first epoch of the Very Large Array…
Evidence for X-ray Emission in Excess to the Jet Afterglow Decay 3.5 yrs After the Binary Neutron Star Merger GW 170817: A New Emission Component
A. Hajela, R. Margutti, J. S. Bright +34
For the first years after the binary neutron star merger event GW 170817 the radio and X-ray radiation has been dominated by emission from a structured relativistic off-axi…
GRB Fermi-LAT afterglows: explaining flares, breaks, and energetic photons
N. Fraija, T. Laskar, S. Dichiara +4
The Fermi-LAT collaboration presented the second gamma-ray burst (GRB) catalog covering its first 10 years of operations. A significant fraction of afterglow-phase light curves in…
Afterglow light curves of the non-relativistic ejecta mass in a stratified circumstellar medium
N. Fraija, B. Betancourt Kamenetskaia, M. G. Dainotti +4
We present the afterglow light curves produced by the deceleration of the non-relativistic ejecta mass in a stratified circumstellar medium with a density profile $n(r)\propto r^{-…
On the origin of the multi-GeV photons from the closest burst with intermediate luminosity: GRB 190829A
N. Fraija, P. Veres, P. Beniamini +4
Very-high-energy (VHE) emission is usually interpreted in the synchrotron-self Compton (SSC) scenario, and expected from the low-redshift and high-luminosity gamma-ray bursts (GRBs…
Ready, set, launch: time interval between BNS merger and short GRB jet formation
Paz Beniamini, Rodolfo Barniol Duran, Maria Petropoulou +1
The joint detection of GW~170817/GRB 170817 confirmed the long-standing theory that binary neutron star mergers produce short gamma-ray burst (sGRB) jets that can successfully brea…
A Reverse Shock in GRB 181201A
Tanmoy Laskar, Hendrik van Eerten, Patricia Schady +26
We present comprehensive multiwavelength radio to X-ray observations of GRB 181201A spanning from s to days after the burst, comprising the first joint AL…
Synchrotron self-Compton as a likely mechanism of photons beyond the synchrotron limit in GRB 190114C
N. Fraija, R. Barniol Duran, S. Dichiara +1
GRB 190114C, a long and luminous burst, was detected by several satellites and ground-based telescopes from radio wavelengths to GeV gamma-rays. In the GeV gamma-rays, the Fermi LA…
Description of atypical bursts seen slightly off-axis
N. Fraija, F. De Colle, P. Veres +5
The detection of gravitational waves together with their electromagnetic counterpart, in the gamma-ray burst GRB 170817A, marked a new era of multi-messenger astronomy. Several the…
Analysis and modelling of the multi-wavelength observations of the luminous GRB 190114C
N. Fraija, S. Dichiara, A. C. Caligula do E. S. Pedreira +4
Very-high-energy (VHE; GeV) photons are expected from the nearest and brightest Gamma-ray bursts (GRBs). VHE photons, at energies higher than 300 GeV, were recently repor…
Observational Constraints on Late-Time Radio Rebrightening of GRB-Supernovae
Charee Peters, Alexander J. van der Horst, Laura Chomiuk +6
We present a search for late-time rebrightening of radio emission from three supernovae (SNe) with associated gamma-ray bursts (GRBs). It has been previously proposed that the unus…
First ALMA Light Curve Constrains Refreshed Reverse Shocks and Jet Magnetization in GRB 161219B
Tanmoy Laskar, Kate D. Alexander, Edo Berger +13
We present detailed multi-wavelength observations of GRB 161219B at , spanning the radio to X-ray regimes, and the first ALMA light curve of a GRB afterglow. The cm- and…
Marginally fast cooling synchrotron models for prompt GRBs
Paz Beniamini, Rodolfo Barniol Duran, Dimitrios Giannios
Previous studies have considered synchrotron as the emission mechanism for prompt Gamma-Ray Bursts (GRBs). These works have shown that the electrons must cool on a timescale compar…
The short GRB 170817A: Modelling the off-axis emission and implications on the ejecta magnetization
N. Fraija, F. De Colle, P. Veres +4
The short GRB 170817A, detected by the Fermi Gamma-ray Burst Monitor, orbiting satellites and ground-based telescopes, was the electromagnetic counterpart of a gravitational-wave t…
Modeling the high-energy emission in GRB 110721A and implications on the early multiwavelength and polarimetric observations
N. Fraija, W. H. Lee, M. Araya +3
GRB 110721A was detected by the Gamma-ray Burst Monitor and the Large Area Telescope (LAT) onboard the Fermi satellite and the Gamma-ray Burst Polarimeter onboard the IKAROS solar…
Collapsar Gamma-Ray Bursts: how the luminosity function dictates the duration distribution
Maria Petropoulou, Rodolfo Barniol Duran, Dimitrios Giannios
Jets in long-duration -ray bursts (GRBs) have to drill through the collapsing star in order to break out of it and produce the -ray signal while the central engine is still a…
Off-axis short GRBs from structured jets as counterparts to GW events
Adithan Kathirgamaraju, Rodolfo Barniol Duran, Dimitrios Giannios
Binary neutron star mergers are considered to be the most favorable sources that produce electromagnetic (EM) signals associated with gravitational waves (GWs). These mergers are t…
Theoretical Description Of GRB 160625B with Wind-to-ISM Transition and Implications for a Magnetized Outflow
N. Fraija, P. Veres, B. B. Zhang +7
GRB 160625B, one of the brightest bursts in recent years, was simultaneously observed by Fermi and Swift satellites, and ground-based optical telescopes in three different events s…
High-energy emission as signature of magnetic field amplification in Neutron Star Mergers
Nissim Fraija, William H. Lee, Peter Veres +1
The merger of a binary neutron star system is suggested as the central engine of short gamma-ray bursts (sGRBs). For the merger process, simulations predict that magnetic field is…
TDE fallback cut-off due to a pre-existing accretion disc
Adithan Kathirgamaraju, Rodolfo Barniol Duran, Dimitrios Giannios
Numerous tidal disruption event (TDE) candidates originating from galactic centres have been detected (e.g., by and ASASSN). Some of their host galaxies show typical…