VLT identification of the optical afterglow of the gamma-ray burst GRB 000131 at z=4.50
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VLT identification of the optical afterglow of the gamma-ray burst GRB 000131 at z=4.50. / Andersen, M. I.; Hjorth, J.; Pedersen, H.; Jensen, B. L.; Hunt, L. K.; Gorosabel, J.; Moller, P.; Fynbo, J.; Kippen, R. M.; Thomsen, B.; Olsen, L. F.; Christensen, L.; Vestergaard, Marianne; Masetti, N.; Palazzi, E.; Hurley, K.; Cline, T.; Kaper, L.; Jaunsen, A. O.
I: Astronomy & Astrophysics, Bind 364, 17.10.2000, s. L54-L61.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - VLT identification of the optical afterglow of the gamma-ray burst GRB 000131 at z=4.50
AU - Andersen, M. I.
AU - Hjorth, J.
AU - Pedersen, H.
AU - Jensen, B. L.
AU - Hunt, L. K.
AU - Gorosabel, J.
AU - Moller, P.
AU - Fynbo, J.
AU - Kippen, R. M.
AU - Thomsen, B.
AU - Olsen, L. F.
AU - Christensen, L.
AU - Vestergaard, Marianne
AU - Masetti, N.
AU - Palazzi, E.
AU - Hurley, K.
AU - Cline, T.
AU - Kaper, L.
AU - Jaunsen, A. O.
PY - 2000/10/17
Y1 - 2000/10/17
N2 - We report the discovery of the gamma-ray burst GRB 000131 and its optical afterglow. The optical identification was made with the VLT 84 hours after the burst following a BATSE detection and an Inter Planetary Network localization. GRB 000131 was a bright, long-duration GRB, with an apparent precursor signal 62 s prior to trigger. The afterglow was detected in ESO VLT, NTT, and DK1.54m follow-up observations. Broad-band and spectroscopic observations of the spectral energy distribution reveals a sharp break at optical wavelengths which is interpreted as a Ly-alpha absorption edge at 6700 A. This places GRB 000131 at a redshift of 4.500 +/- 0.015. The inferred isotropic energy release in gamma rays alone was approximately 10^54 erg (depending on the assumed cosmology). The rapid power-law decay of the afterglow (index alpha=2.25, similar to bursts with a prior break in the lightcurve), however, indicates collimated outflow, which relaxes the energy requirements by a factor of
AB - We report the discovery of the gamma-ray burst GRB 000131 and its optical afterglow. The optical identification was made with the VLT 84 hours after the burst following a BATSE detection and an Inter Planetary Network localization. GRB 000131 was a bright, long-duration GRB, with an apparent precursor signal 62 s prior to trigger. The afterglow was detected in ESO VLT, NTT, and DK1.54m follow-up observations. Broad-band and spectroscopic observations of the spectral energy distribution reveals a sharp break at optical wavelengths which is interpreted as a Ly-alpha absorption edge at 6700 A. This places GRB 000131 at a redshift of 4.500 +/- 0.015. The inferred isotropic energy release in gamma rays alone was approximately 10^54 erg (depending on the assumed cosmology). The rapid power-law decay of the afterglow (index alpha=2.25, similar to bursts with a prior break in the lightcurve), however, indicates collimated outflow, which relaxes the energy requirements by a factor of
KW - astro-ph
M3 - Journal article
VL - 364
SP - L54-L61
JO - Astronomy & Astrophysics
JF - Astronomy & Astrophysics
SN - 0004-6361
ER -
ID: 123370497