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37 papers
Origin of the strong sodium absorption of the lensed supernova 2016geu at z=0.4
Christa Gall, Jens Hjorth, Lise Christensen +7
The origin of strong sodium absorption, which has been observed for a few nearby Type Ia supernovae (SNe Ia), remains elusive. Here we analyse two high-signal-to-noise, intermediat…
GRB 160410A: the first Chemical Study of the Interstellar Medium of a Short GRB
J. F. Agüí Fernández, C. C. Thöne, D. A. Kann +27
Short Gamma-Ray Bursts (SGRBs) are produced by the coalescence of compact binary systems which are remnants of massive stars. GRB 160410A is classified as a short-duration GRB with…
Observation of inverse Compton emission from a long -ray burst
V. A. Acciari, S. Ansoldi, L. A. Antonelli +301
Long-duration gamma-ray bursts (GRBs) originate from ultra-relativistic jets launched from the collapsing cores of dying massive stars. They are characterised by an initial phase o…
An Unambiguous Separation of Gamma-Ray Bursts into Two Classes from Prompt Emission Alone
Christian K. Jespersen, Johann B. Severin, Charles L. Steinhardt +4
The duration of a gamma-ray burst (GRB) is a key indicator of its physics origin, with long bursts perhaps associated with the collapse of massive stars and short bursts with merge…
X-shooter Spectroscopy and HST Imaging of 15 Ultra Massive Quiescent Galaxies at
Mikkel Stockmann, Sune Toft, Anna Gallazzi +23
We present a detailed analysis of a large sample of spectroscopically confirmed ultra-massive quiescent galaxies () at . This sam…
GRB 190114C in the nuclear region of an interacting galaxy -- A detailed host analysis using ALMA, HST and VLT
A. de Ugarte Postigo, C. C. Thöne, S. Martın +28
GRB 190114C is the first GRB for which the detection of very-high energy emission up to the TeV range has been reported. It is still unclear whether environmental properties might…