TOUGH: Observational aspects of gamma-ray burst host galaxies

Jens Hjorth , Daniele Malesani , Andreas O. Jaunsen , Andrew J. Levan , Bo Milvang-Jensen , Darach Watson , Javier Gorosabel , Johan P. U. Fynbo

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Micha{\l} J. Micha{\l}owski Nial R. Tanvir P\'all Jakobsson Palle M{\o}ller Steve Schulze Thomas Kr\"uhler

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classification 🌌 astro-ph.CO astro-ph.HE

keywords galaxieshostgrb-selectedobservationalopticallyselectedtoughaspects

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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 selected, lower-redshift galaxies. To study the statistical properties of GRB-selected galaxies we here introduce The Optically Unbiased GRB Host (TOUGH) complete sample of 69 X-ray selected Swift GRB host galaxies spanning the redshift range 0.03-6.30 and summarise the first results of a large observational survey of these galaxies.

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TOUGH: Observational aspects of gamma-ray burst host galaxies

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