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Uncovering a population of gravitational lens galaxies with magnified standard candle SN Zwicky
Ariel Goobar, Joel Johansson, Steve Schulze +35
Detecting gravitationally lensed supernovae is among the biggest challenges in astronomy. It involves a combination of two very rare phenomena: catching the transient signal of a s…
The distribution of equivalent widths in long GRB afterglow spectra
A. de Ugarte Postigo, J. P. U. Fynbo, C. C. Thoene +11
The extreme brightness of gamma-ray burst (GRB) afterglows and their simple spectral shape make them ideal beacons to study the interstellar medium of their host galaxies through a…
TOUGH: Observational aspects of gamma-ray burst host galaxies
Jens Hjorth, Daniele Malesani, Andreas O. Jaunsen +11
GRB-selected galaxies are broadly known to be faint, blue, young, star-forming dwarf galaxies. This insight, however, is based in part on heterogeneous samples of optically selecte…
The optically unbiased GRB host (TOUGH) survey. I. Survey design and catalogs
Jens Hjorth, Daniele Malesani, Páll Jakobsson +11
Long-duration gamma-ray bursts (GRBs) are powerful tracers of star-forming galaxies. We have defined a homogeneous subsample of 69 Swift GRB-selected galaxies spanning a very wide…
Probing GRB environments with time variability: ULTRASPEC fast imaging of GRB 080210
A. De Cia, P. Jakobsson, G. Björnsson +12
We present high time resolution (1.09 s) photometry of GRB 080210 obtained with ULTRASPEC mounted on the ESO/3.6-m telescope, starting 68.22 min after the burst and lasting for 26.…