13 citations · 37 across the 4 of their papers we have counts for
4 papers
Investigating time variability of X-ray absorption in Swift GRBs
Vlasta Valan, Josefin Larsson, Björn Ahlgren
The existence of excess absorption in the X-ray spectra of GRBs is well known, but the primary location of the absorbing material is still uncertain. To gain more knowledge about t…
A comprehensive view of blackbody components in the X-ray spectra of GRBs
Vlasta Valan, Josefin Larsson
A small fraction of gamma-ray bursts (GRBs) exhibit blackbody emission in the X-ray spectra, the origin of which is debated. In order to gain a more complete understanding of this…
Investigating subphotospheric dissipation in gamma-ray bursts using joint Fermi-Swift observations
Björn Ahlgren, Josefin Larsson, Vlasta Valan +3
The jet photosphere has been proposed as the origin for the gamma-ray burst (GRB) prompt emission. In many such models, characteristic features in the spectra appear below the ener…
Thermal components in the early X-ray afterglows of GRBs: likely cocoon emission and constraints on the progenitors
Vlasta Valan, Josefin Larsson, Björn Ahlgren
The early X-ray afterglows of gamma-ray bursts (GRBs) are usually well described by absorbed power laws. However, in some cases, additional thermal components have been identified.…