GRB 080913 at redshift 6.7
(2009) GRB 080913 at redshift 6.7. Astrophysical Journal, Vol.693 (No.2). pp. 1610-1620. ISSN 0004-637X Full text not available from this repository.
Official URL: http://dx.doi.org/10.1088/0004-637X/693/2/1610
We report on the detection by Swift of GRB 080913, and subsequent optical/near-infrared follow-up observations by GROND, which led to the discovery of its optical/NIR afterglow and the recognition of its high-z nature via the detection of a spectral break between the i' and z' bands. Spectroscopy obtained at the ESO-VLT revealed a continuum extending down to lambda = 9400 angstrom, and zero flux for 7500 angstrom< lambda < 9400 angstrom, which we interpret as the onset of a Gunn-Peterson trough at z = 6.695 +/- 0.025 (95.5% confidence level), making GRB 080913 the highest-redshift gamma-ray burst (GRB) to date, and more distant than the highest-redshift QSO. We note that many redshift indicators that are based on promptly available burst or afterglow properties have failed for GRB 080913. We report on our follow-up campaign and compare the properties of GRB 080913 with bursts at lower redshift. In particular, since the afterglow of this burst is fainter than typical for GRBs, we show that 2 m class telescopes can identify most high-redshift GRBs.
|Item Type:||Journal Item|
|Subjects:||Q Science > QB Astronomy|
|Divisions:||Faculty of Science > Physics|
|Journal or Publication Title:||Astrophysical Journal|
|Official Date:||10 March 2009|
|Number of Pages:||11|
|Page Range:||pp. 1610-1620|
|Access rights to Published version:||Restricted or Subscription Access|
|Funder:||XMM-Newton SOC, DFG, EU, Leibniz-Prize, European Southern Observatory, Chile|
|Grant number:||MEIF-CT-2006-041363, HA 1850/28-1, 081.A-0135, 081.A-0856, 081.A-0966|
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