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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…
Optical/near-infrared selection of red QSOs: Evidence for steep extinction curves towards galactic centers?
J. P. U. Fynbo, J. -K. Krogager, B. Venemans +5
We present the results of a search for red QSOs using a selection based on optical imaging from SDSS and near-infrared imaging from UKIDSS. For a sample of 58 candidates 46 (79%) a…
The Optically Unbiased GRB Host (TOUGH) survey. IV. Lyman-alpha emitters
Bo Milvang-Jensen, Johan P. U. Fynbo, Daniele Malesani +3
We report the results of a spectroscopic search for Lyman-alpha emission from gamma-ray burst host galaxies. Based on the well-defined TOUGH sample of 69 X-ray selected Swift GRBs,…
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…
UltraVISTA: a new ultra-deep near-infrared survey in COSMOS
H. J. McCracken, B. Milvang-Jensen, J. Dunlop +18
In this paper we describe the first data release of the UltraVISTA near-infrared imaging survey of the COSMOS field. We summarise the key goals and design of the survey and provide…