80 citations · 208 across the 9 of their papers we have counts for
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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…
Onset of particle acceleration during the prompt phase in gamma-ray bursts as revealed by synchrotron emission in GRB160821A
Felix Ryde, Shabnam Iyyani, Björn Ahlgren +4
The physical processes of the gamma-ray emission and particle acceleration during the prompt phase in GRBs are still unsettled. In order to perform an unambiguous physical modellin…
A semi-analytic afterglow with thermal electrons and synchrotron self-Compton emission
Donald C. Warren, Maria Dainotti, Maxim V. Barkov +3
We extend previous work on gamma-ray burst (GRB) afterglows involving hot thermal electrons at the base of a shock-accelerated tail. Using a physically-motivated electron distribut…
A search for lensed gamma-ray bursts in 11 years of observations by Fermi GBM
Björn Ahlgren, Josefin Larsson
Macrolensing of gamma-ray bursts (GRBs) is expected to manifest as a GRB recurring with the same light curve and spectrum as a previous one, but with a different flux and a slightl…
The Fraction of Gamma-ray Bursts with an Observed Photospheric Emission Episode
Zeynep Acuner, Felix Ryde, Asaf Pe'er +2
There is no complete description of the emission physics during the prompt phase in gamma-ray bursts. Spectral analyses, however, indicate that many spectra are narrower than what…
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…