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Evolution of the afterglow optical spectral shape of GRB 201015A in the first hour: evidence for dust destruction
Toktarkhan Komesh, Bruce Grossan, Zhanat Maksut +3
Instruments such as the ROTSE, TORTORA, Pi of the Sky, MASTER-net, and others have recorded single-band optical flux measurements of gamma-ray bursts starting as early as $\thicksi…
Constraining HeII Reionization Detection Uncertainties via Fast Radio Bursts
Albert Wai Kit Lau, Ayan Mitra, Mehdi Shafiee +1
Context. The increased detection rate of Fast Radio Bursts (FRBs) makes it likely to get samples of sizes to in the near future. Because of…
The Emission Mechanism of Gamma-Ray Bursts: Identification via Optical-IR Slope Measurements
Bruce Grossan, Pawan Kumar, George F. Smoot
There is no consensus on the emission mechanism of -ray bursts (GRBs). A synchrotron model can produce -ray spectra with the empirical Band function form, from a piece-wise t…
Mergers of black hole-neutron star binaries and rates of associated electromagnetic counterparts
Mukul Bhattacharya, Pawan Kumar, George Smoot
Black hole-neutron star (BHNS) binaries are amongst promising candidates for the joint detection of electromagnetic (EM) signals with gravitational waves (GWs) and are expected to…
Thermal and non-thermal emission from the cocoon of a gamma-ray burst jet
Fabio De Colle, Wenbin Lu, Pawan Kumar +2
We present hydrodynamic simulations of the hot cocoon produced when a relativistic jet passes through the gamma-ray burst (GRB) progenitor star and its environment, and we compute…
Probing Massive Stars Around Gamma-Ray Burst Progenitors
Wenbin Lu, Pawan Kumar, George F. Smoot
Long Gamma-Ray Bursts (GRBs) are produced by ultra-relativistic jets launched from core collapse of massive stars. Most massive stars form in binaries and/or in star clusters, whic…