Oscar Wistemar
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View article: Photospheric emission from GRB 211211A altered by a strong radiation-mediated shock
Photospheric emission from GRB 211211A altered by a strong radiation-mediated shock Open
Gamma-ray burst (GRB) spectra are typically non-thermal, with many including two spectral breaks suggestive of optically thin emission. However, the emitted spectrum from a GRB photosphere, which includes prior dissipation of energy by rad…
View article: A Generalized Method to Measure the Lorentz Factor from Gamma-Ray Burst Photospheric Emission
A Generalized Method to Measure the Lorentz Factor from Gamma-Ray Burst Photospheric Emission Open
The properties of gamma-ray bursts (GRBs) that are inferred from observations depend on the value of the bulk Lorentz factor, Γ. Consequently, accurately estimating it is an important aim. In this work, we present a method of measuring Γ b…
View article: Exploring Absorption in the Host Galaxies of Gamma-Ray Bursts
Exploring Absorption in the Host Galaxies of Gamma-Ray Bursts Open
Gamma-ray bursts (GRB) are extremely high energy pulses that are connected to supernovae and black hole formation. They are divided into two forms, long and short GRBs. The emission of a GRB are split into two phases, the prompt emission p…