The afterglow and host galaxy of GRB 090205

Evidence of a Ly- α emitter at z = 4.65

P. D'Avanzo, M. Perri, D. Fugazza, R. Salvaterra, G. Chincarini, R. Margutti, X. F. Wu, C. C. Thöne, A. Fernández-Soto, T. N. Ukwatta, David Nelson Burrows, N. Gehrels, Peter Istvan Meszaros, K. Toma, B. Zhang, S. Covino, S. Campana, V. D'Elia, M. Della Valle, S. Piranomonte

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Context. Gamma-ray bursts (GRBs) have proven to be detectable to distances much larger than any other astrophysical object, providing the most effective way, complementing ordinary surveys of studying the high redshift universe. Aims. We present the results of an observational campaign devoted to the study of the high-z GRB 090205. Methods. We carried out optical/NIR spectroscopy and imaging of GRB 090205 with the ESO-VLT starting from hours after the event to several days later to detect the host galaxy. We compared the results obtained from our optical/NIR observations with the available Swift high-energy data of this burst. Results. Our observational campaign led to the detection of the optical afterglow and host galaxy of GRB 090205 and to the first measure of its redshift, z = 4.65. As in other high-z GRBs, GRB 090205 has a short duration in the rest frame with T90,rf = 1.6 s, which suggests that it might belong to the short GRB class. The X-ray afterglow of GRB 090205 has a complex and interesting behavior with a possible rebrightening at 500-1000 s from the trigger time and late flaring activity. Photometric observations of the GRB 090205 host galaxy imply that it is a starburst galaxy with a stellar population younger than ∼150 Myr. Moreover, the metallicity of Z > 0.27 ⊙ derived from the GRB afterglow spectrum is among the highest derived from GRB afterglow measurement at high-z, suggesting that the burst occurred in a rather enriched environment. Finally, a detailed analysis of the afterglow spectrum shows the existence of a line corresponding to Lyman-α emission at the redshift of the burst. GRB 090205 is thus hosted by a typical Lyman-α emitter (LAE) at z = 4.65. This makes the host galaxy of GRB 090205 the farthest GRB host galaxy, spectroscopically confirmed, detected to date.

Original languageEnglish (US)
Article numberA20
JournalAstronomy and Astrophysics
Volume522
Issue number1
DOIs
StatePublished - Oct 27 2010

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afterglows
gamma ray bursts
emitters
galaxies
young population
spectroscopy
energy
bursts
starburst galaxies
detection
flaring
analysis
method
European Southern Observatory
metallicity
astrophysics
universe
actuators

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

D'Avanzo, P., Perri, M., Fugazza, D., Salvaterra, R., Chincarini, G., Margutti, R., ... Piranomonte, S. (2010). The afterglow and host galaxy of GRB 090205: Evidence of a Ly- α emitter at z = 4.65. Astronomy and Astrophysics, 522(1), [A20]. https://doi.org/10.1051/0004-6361/201014801
D'Avanzo, P. ; Perri, M. ; Fugazza, D. ; Salvaterra, R. ; Chincarini, G. ; Margutti, R. ; Wu, X. F. ; Thöne, C. C. ; Fernández-Soto, A. ; Ukwatta, T. N. ; Burrows, David Nelson ; Gehrels, N. ; Meszaros, Peter Istvan ; Toma, K. ; Zhang, B. ; Covino, S. ; Campana, S. ; D'Elia, V. ; Della Valle, M. ; Piranomonte, S. / The afterglow and host galaxy of GRB 090205 : Evidence of a Ly- α emitter at z = 4.65. In: Astronomy and Astrophysics. 2010 ; Vol. 522, No. 1.
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abstract = "Context. Gamma-ray bursts (GRBs) have proven to be detectable to distances much larger than any other astrophysical object, providing the most effective way, complementing ordinary surveys of studying the high redshift universe. Aims. We present the results of an observational campaign devoted to the study of the high-z GRB 090205. Methods. We carried out optical/NIR spectroscopy and imaging of GRB 090205 with the ESO-VLT starting from hours after the event to several days later to detect the host galaxy. We compared the results obtained from our optical/NIR observations with the available Swift high-energy data of this burst. Results. Our observational campaign led to the detection of the optical afterglow and host galaxy of GRB 090205 and to the first measure of its redshift, z = 4.65. As in other high-z GRBs, GRB 090205 has a short duration in the rest frame with T90,rf = 1.6 s, which suggests that it might belong to the short GRB class. The X-ray afterglow of GRB 090205 has a complex and interesting behavior with a possible rebrightening at 500-1000 s from the trigger time and late flaring activity. Photometric observations of the GRB 090205 host galaxy imply that it is a starburst galaxy with a stellar population younger than ∼150 Myr. Moreover, the metallicity of Z > 0.27 ⊙ derived from the GRB afterglow spectrum is among the highest derived from GRB afterglow measurement at high-z, suggesting that the burst occurred in a rather enriched environment. Finally, a detailed analysis of the afterglow spectrum shows the existence of a line corresponding to Lyman-α emission at the redshift of the burst. GRB 090205 is thus hosted by a typical Lyman-α emitter (LAE) at z = 4.65. This makes the host galaxy of GRB 090205 the farthest GRB host galaxy, spectroscopically confirmed, detected to date.",
author = "P. D'Avanzo and M. Perri and D. Fugazza and R. Salvaterra and G. Chincarini and R. Margutti and Wu, {X. F.} and Th{\"o}ne, {C. C.} and A. Fern{\'a}ndez-Soto and Ukwatta, {T. N.} and Burrows, {David Nelson} and N. Gehrels and Meszaros, {Peter Istvan} and K. Toma and B. Zhang and S. Covino and S. Campana and V. D'Elia and {Della Valle}, M. and S. Piranomonte",
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D'Avanzo, P, Perri, M, Fugazza, D, Salvaterra, R, Chincarini, G, Margutti, R, Wu, XF, Thöne, CC, Fernández-Soto, A, Ukwatta, TN, Burrows, DN, Gehrels, N, Meszaros, PI, Toma, K, Zhang, B, Covino, S, Campana, S, D'Elia, V, Della Valle, M & Piranomonte, S 2010, 'The afterglow and host galaxy of GRB 090205: Evidence of a Ly- α emitter at z = 4.65', Astronomy and Astrophysics, vol. 522, no. 1, A20. https://doi.org/10.1051/0004-6361/201014801

The afterglow and host galaxy of GRB 090205 : Evidence of a Ly- α emitter at z = 4.65. / D'Avanzo, P.; Perri, M.; Fugazza, D.; Salvaterra, R.; Chincarini, G.; Margutti, R.; Wu, X. F.; Thöne, C. C.; Fernández-Soto, A.; Ukwatta, T. N.; Burrows, David Nelson; Gehrels, N.; Meszaros, Peter Istvan; Toma, K.; Zhang, B.; Covino, S.; Campana, S.; D'Elia, V.; Della Valle, M.; Piranomonte, S.

In: Astronomy and Astrophysics, Vol. 522, No. 1, A20, 27.10.2010.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The afterglow and host galaxy of GRB 090205

T2 - Evidence of a Ly- α emitter at z = 4.65

AU - D'Avanzo, P.

AU - Perri, M.

AU - Fugazza, D.

AU - Salvaterra, R.

AU - Chincarini, G.

AU - Margutti, R.

AU - Wu, X. F.

AU - Thöne, C. C.

AU - Fernández-Soto, A.

AU - Ukwatta, T. N.

AU - Burrows, David Nelson

AU - Gehrels, N.

AU - Meszaros, Peter Istvan

AU - Toma, K.

AU - Zhang, B.

AU - Covino, S.

AU - Campana, S.

AU - D'Elia, V.

AU - Della Valle, M.

AU - Piranomonte, S.

PY - 2010/10/27

Y1 - 2010/10/27

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AB - Context. Gamma-ray bursts (GRBs) have proven to be detectable to distances much larger than any other astrophysical object, providing the most effective way, complementing ordinary surveys of studying the high redshift universe. Aims. We present the results of an observational campaign devoted to the study of the high-z GRB 090205. Methods. We carried out optical/NIR spectroscopy and imaging of GRB 090205 with the ESO-VLT starting from hours after the event to several days later to detect the host galaxy. We compared the results obtained from our optical/NIR observations with the available Swift high-energy data of this burst. Results. Our observational campaign led to the detection of the optical afterglow and host galaxy of GRB 090205 and to the first measure of its redshift, z = 4.65. As in other high-z GRBs, GRB 090205 has a short duration in the rest frame with T90,rf = 1.6 s, which suggests that it might belong to the short GRB class. The X-ray afterglow of GRB 090205 has a complex and interesting behavior with a possible rebrightening at 500-1000 s from the trigger time and late flaring activity. Photometric observations of the GRB 090205 host galaxy imply that it is a starburst galaxy with a stellar population younger than ∼150 Myr. Moreover, the metallicity of Z > 0.27 ⊙ derived from the GRB afterglow spectrum is among the highest derived from GRB afterglow measurement at high-z, suggesting that the burst occurred in a rather enriched environment. Finally, a detailed analysis of the afterglow spectrum shows the existence of a line corresponding to Lyman-α emission at the redshift of the burst. GRB 090205 is thus hosted by a typical Lyman-α emitter (LAE) at z = 4.65. This makes the host galaxy of GRB 090205 the farthest GRB host galaxy, spectroscopically confirmed, detected to date.

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D'Avanzo P, Perri M, Fugazza D, Salvaterra R, Chincarini G, Margutti R et al. The afterglow and host galaxy of GRB 090205: Evidence of a Ly- α emitter at z = 4.65. Astronomy and Astrophysics. 2010 Oct 27;522(1). A20. https://doi.org/10.1051/0004-6361/201014801