Near real-time selection of high redshift GRBs with Swift

Details Near real-time selection of high redshift GRBs with Swift Near real-time selection of high redshift GRBs with Swift

2006-10-20

arxiv.org/abs/astro-ph/0610626v1

Astron.Astrophys.464:L25,2007

Astronomy and Astrophysics

Astrophysics

Submitted to A&A Letters

Scientific paper

10.1051/0004-6361:20066592

A good fraction of GRBs detected by Swift are at a large redshift (up to z=6.3, so far). Their study allows us to investigate, among other things, the cosmic star formation in the early Universe (possibly up to the re-ionization era) and the chemical enrichment of the high-redshift gas. Here we present and discuss a method of selection which identifies high-redshift candidates based only upon promptly-available information provided by Swift. This method relies upon, Galactic extinction, GRB duration time and absence of an optical counterpart in the UVOT telescope onboard Swift. This tool may provide an extremely effective way to locate high-redshift astrophysical objects and to follow them in the optical/NIR band in near real time.

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