10 citations · 27 across the 10 of their papers we have counts for
10 papers
X-ray Analysis of Gamma-Ray Burst Flares and Underlying Afterglows: Insights into Origin of Flares
H. Dereli-Bégué, A. Pe'er, D. Bégué +2
Gamma-ray burst (GRB) X-ray light curves exhibit a variety of complex temporal structures, such as flares and plateaus. The origin of flares seen in many GRB early afterglows is st…
Modeling of the time-resolved spectral energy distribution of blazar OJ 287 from 2008 to 2023: a comprehensive multi-epoch study
G. Harutyunyan, N. Sahakyan, D. Bégué
We present a comprehensive analysis of the time-resolved spectral energy distributions (SEDs) of the blazar OJ 287 over a 15-year period (2008-2023), using multi-wavelength data. I…
Unraveling the Origins of GRB X-ray Plateaus through a Study of X-ray Flares
H. Dereli-Bégué, A. Pe'er, D. Bégué +1
The X-ray light curves of gamma-ray bursts (GRBs) display complex features, including plateaus and flares, that challenge theoretical models. Here, we study the properties of flare…
Radiative cooling changes the dynamics of magnetically arrested disks
Akshay Singh, Damien Bégué, Asaf Pe'er
We studied magnetically arrested disks (MAD) around rotating black holes (BH), under the influence of radiative cooling. We introduce a critical value of the mass accretion rate $\…
Markarian Multiwavelength Data Center (MMDC): A Tool for Retrieving and Modeling Multi-temporal, Multi-wavelength and Multi-messenger Data from Blazar Observations
N. Sahakyan, V. Vardanyan, P. Giommi +7
The Markarian Multiwavelength Data Center (MMDC) is a web-based tool designed for accessing and retrieving multiwavelength and multimessenger data from blazar observations. MMDC fa…
Modeling blazar broadband emission with convolutional neural networks -- II. External Compton model
N. Sahakyan, D. Bégué, A. Casotto +6
In the context of modeling spectral energy distributions (SEDs) for blazars, we extend the method that uses a convolutional neural network (CNN) to include external inverse Compton…
Modeling blazar broadband emission with convolutional neural networks -- I. Synchrotron self-Compton model
Damien Bégué, Narek Sahakyan, Hüsne Dereli Bégué +5
Modeling the multiwavelength spectral energy distributions (SEDs) of blazars provides key insights into the underlying physical processes responsible for the emission. While SED mo…
Probing gamma-ray bursts observed at very high energies through their afterglow
Ersilia Guarini, Irene Tamborra, Damien Bégué +1
A growing number of gamma-ray burst (GRB) afterglows is observed at very-high energies (VHE, GeV). Yet, our understanding of the mechanism powering the VHE emission r…
cuHARM : a new GPU accelerated GR-MHD code and its application to ADAF disks
Damien Bégué, Asaf Pe'er, Guoqiang Zhang +2
We introduce a new GPU-accelerated general-relativistic magneto-hydrodynamic (GR-MHD) code based on HARM which we call cuHARM. The code is written in CUDA-C and uses OpenMP to para…
Bethe-Heitler signature in proton synchrotron models for gamma-ray bursts
Damien Bégué, Filip Samuelsson, Asaf Pe'er
We study the effect of Bethe-Heitler (BeHe) pair production on a proton synchrotron model for the prompt emission in gamma-ray bursts (GRBs). The possible parameter space of the mo…