GRB 080913 at Redshift 6.7

J. Greiner; T. Krühler; J.~P.~U. Fynbo; A. Rossi; R. Schwarz; S. Klose; S. Savaglio; N.~R. Tanvir; S. McBreen; T. Totani; B.~B. Zhang; X.~F. Wu; D. Watson; S.~D. Barthelmy; A.~P. Beardmore; P. Ferrero; N. Gehrels; D.~A. Kann; N. Kawai; A. Küpcü Yoldaș; P. Mészáros; B. Milvang-Jensen; S.~R. Oates; D. Pierini; P. Schady; K. Toma; P.~M. Vreeswijk; A. Yoldaș; B. Zhang; P. Afonso; K. Aoki; D.~N. Burrows; C. Clemens; R. Filgas; Z. Haiman; D.~H. Hartmann; G. Hasinger; J. Hjorth; E. Jehin; A.~J. Levan; E.~W. Liang; D. Malesani; T. -S. Pyo; S. Schulze; G. Szokoly; K. Terada; K. Wiersema

doi:10.1088/0004-637X/693/2/1610

GRB 080913 at Redshift 6.7

J. Greiner, T. Krühler, J.~P.~U. Fynbo, A. Rossi, R. Schwarz, S. Klose, S. Savaglio, N.~R. Tanvir, S. McBreen, T. Totani, B.~B. Zhang, X.~F. Wu, D. Watson, S.~D. Barthelmy, A.~P. Beardmore, P. Ferrero, N. Gehrels, D.~A. Kann, N. Kawai, A. Küpcü YoldașP. Mészáros, B. Milvang-Jensen, S.~R. Oates, D. Pierini, P. Schady, K. Toma, P.~M. Vreeswijk, A. Yoldaș, B. Zhang, P. Afonso, K. Aoki, D.~N. Burrows, C. Clemens, R. Filgas, Z. Haiman, D.~H. Hartmann, G. Hasinger, J. Hjorth, E. Jehin, A.~J. Levan, E.~W. Liang, D. Malesani, T. -S. Pyo, S. Schulze, G. Szokoly, K. Terada, K. Wiersema

Department of Physics

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Abstract

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 λ = 9400 Å, and zero flux for 7500 Å<λ < 9400 Å, 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.

Original language	English
Pages (from-to)	1610-1620
Number of pages	11
Journal	Astrophysical Journal
Volume	693
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/693/2/1610
Publication status	Published - 10 Mar 2009

Keywords

early universe, gamma rays: bursts, radiation mechanisms: non-thermal, Astrophysics

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10.1088/0004-637X/693/2/1610

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Greiner, J., Krühler, T., Fynbo, J. P. U., Rossi, A., Schwarz, R., Klose, S., Savaglio, S., Tanvir, N. R., McBreen, S., Totani, T., Zhang, B. B., Wu, X. F., Watson, D., Barthelmy, S. D., Beardmore, A. P., Ferrero, P., Gehrels, N., Kann, D. A., Kawai, N., ... Wiersema, K. (2009). GRB 080913 at Redshift 6.7. Astrophysical Journal, 693(2), 1610-1620. https://doi.org/10.1088/0004-637X/693/2/1610

Greiner, J, Krühler, T, Fynbo, JPU, Rossi, A, Schwarz, R, Klose, S, Savaglio, S, Tanvir, NR, McBreen, S, Totani, T, Zhang, BB, Wu, XF, Watson, D, Barthelmy, SD, Beardmore, AP, Ferrero, P, Gehrels, N, Kann, DA, Kawai, N, Yoldaș, AK, Mészáros, P, Milvang-Jensen, B, Oates, SR, Pierini, D, Schady, P, Toma, K, Vreeswijk, PM, Yoldaș, A, Zhang, B, Afonso, P, Aoki, K, Burrows, DN, Clemens, C, Filgas, R, Haiman, Z, Hartmann, DH, Hasinger, G, Hjorth, J, Jehin, E, Levan, AJ, Liang, EW, Malesani, D, Pyo, T-S, Schulze, S, Szokoly, G, Terada, K & Wiersema, K 2009, 'GRB 080913 at Redshift 6.7', Astrophysical Journal, vol. 693, no. 2, pp. 1610-1620. https://doi.org/10.1088/0004-637X/693/2/1610

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title = "GRB 080913 at Redshift 6.7",

abstract = " 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 λ = 9400 {\AA}, and zero flux for 7500 {\AA}<λ < 9400 {\AA}, 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. ",

keywords = "early universe, gamma rays: bursts, radiation mechanisms: non-thermal, Astrophysics",

author = "J. Greiner and T. Kr{\"u}hler and J.~P.~U. Fynbo and A. Rossi and R. Schwarz and S. Klose and S. Savaglio and N.~R. Tanvir and S. McBreen and T. Totani and B.~B. Zhang and X.~F. Wu and D. Watson and S.~D. Barthelmy and A.~P. Beardmore and P. Ferrero and N. Gehrels and D.~A. Kann and N. Kawai and Yoldaș, {A. K{\"u}pc{\"u}} and P. M{\'e}sz{\'a}ros and B. Milvang-Jensen and S.~R. Oates and D. Pierini and P. Schady and K. Toma and P.~M. Vreeswijk and A. Yoldaș and B. Zhang and P. Afonso and K. Aoki and D.~N. Burrows and C. Clemens and R. Filgas and Z. Haiman and D.~H. Hartmann and G. Hasinger and J. Hjorth and E. Jehin and A.~J. Levan and E.~W. Liang and D. Malesani and Pyo, {T. -S.} and S. Schulze and G. Szokoly and K. Terada and K. Wiersema",

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doi = "10.1088/0004-637X/693/2/1610",

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T1 - GRB 080913 at Redshift 6.7

AU - Greiner, J.

AU - Krühler, T.

AU - Fynbo, J.~P.~U.

AU - Rossi, A.

AU - Schwarz, R.

AU - Klose, S.

AU - Savaglio, S.

AU - Tanvir, N.~R.

AU - McBreen, S.

AU - Totani, T.

AU - Zhang, B.~B.

AU - Wu, X.~F.

AU - Watson, D.

AU - Barthelmy, S.~D.

AU - Beardmore, A.~P.

AU - Ferrero, P.

AU - Gehrels, N.

AU - Kann, D.~A.

AU - Kawai, N.

AU - Yoldaș, A. Küpcü

AU - Mészáros, P.

AU - Milvang-Jensen, B.

AU - Oates, S.~R.

AU - Pierini, D.

AU - Schady, P.

AU - Toma, K.

AU - Vreeswijk, P.~M.

AU - Yoldaș, A.

AU - Zhang, B.

AU - Afonso, P.

AU - Aoki, K.

AU - Burrows, D.~N.

AU - Clemens, C.

AU - Filgas, R.

AU - Haiman, Z.

AU - Hartmann, D.~H.

AU - Hasinger, G.

AU - Hjorth, J.

AU - Jehin, E.

AU - Levan, A.~J.

AU - Liang, E.~W.

AU - Malesani, D.

AU - Pyo, T. -S.

AU - Schulze, S.

AU - Szokoly, G.

AU - Terada, K.

AU - Wiersema, K.

PY - 2009/3/10

Y1 - 2009/3/10

N2 - 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 λ = 9400 Å, and zero flux for 7500 Å<λ < 9400 Å, 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.

AB - 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 λ = 9400 Å, and zero flux for 7500 Å<λ < 9400 Å, 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.

KW - early universe, gamma rays: bursts, radiation mechanisms: non-thermal, Astrophysics

U2 - 10.1088/0004-637X/693/2/1610

DO - 10.1088/0004-637X/693/2/1610

M3 - Article

SN - 0004-637X

VL - 693

SP - 1610

EP - 1620

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

GRB 080913 at Redshift 6.7

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