Physics
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007atnf.prop.1068m&link_type=abstract
ATNF proposal C1741, Semester: October, 2007
Physics
Extragalactic, Atca
Scientific paper
We propose to observe a clean, well-defined sample of gamma-ray burst (GRB) host galaxies in an optimum redshift range for detection (z<1) to resolve the question: What are the star-formation rates of GRB hosts? Mapping the growth of cosmic structure and star-formation is of prime importance in cosmology. GRB hosts constitute a unique probe of galaxy evolution; they are identified over a wide redshift range, selected independent of their luminosity, and trace at least some fraction of universal star-formation. Unfortunately, the GRB hosts studied before do not constitute a fair sample of the population. To get localisations and redshifts, the presence of an optical afterglow was usually a requirement, leading to a strong bias against dusty systems. To take advantage of the success of the Swift satellite, producing a large sample of GRBs, we have embarked upon a multi-facility campaign to understand the nature of GRB hosts, founded on a VLT large program. Our follow-up is producing a sample both larger and much less optically-biased than previous studies. We select galaxies based only on having an accurate X-ray position.
Castro Cerón José María
Fynbo Johan
Hjorth Jens
Malesani Daniele
Michalowski Michal
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