The optical afterglow of the gamma-ray burst GRB 012111

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dc.contributor.authorHolland, ST
dc.contributor.authorSoszynski, I
dc.contributor.authorGladders, MD
dc.contributor.authorBarrientos, LF
dc.contributor.authorBerlind, P
dc.contributor.authorBersier, D
dc.contributor.authorGarnavich, PM
dc.contributor.authorJha, S
dc.contributor.authorStanek, KZ
dc.date.accessioned2025-01-21T01:10:44Z
dc.date.available2025-01-21T01:10:44Z
dc.date.issued2002
dc.description.abstractWe present early-time optical photometry and spectroscopy of the optical afterglow of the gamma-ray burst GRB 011211. The spectrum of the optical afterglow contains several narrow metal lines that are consistent with the burst's occurring at a redshift of 2.14 +/- 0.001. The optical afterglow decays as a power law with a slope of alpha = 0.83 +/- 0.04 for the first approximate to2 days after the burst, at which time there is evidence of a break. The slope after the break is greater than or equal to 1.4. There is evidence of rapid variations in the R-band light approximately 0.5 days after the burst. These variations suggest that there are density fluctuations near the gamma-ray burst on spatial scales of approximately 40-125 AU. The magnitude of the break in the light curve, the spectral slope, and the rate of decay in the optical suggest that the burst expanded into an ambient medium that is homogeneous on large scales. We estimate that the local particle density is between approximately 0.1 and 10 cm(-3) and that the total gamma-ray energy in the burst was (1.2-1.9) x 10(50) ergs. This energy is smaller than, but consistent with, the "standard" value of (5 +/- 2) x 10(50) ergs. Comparing the observed color of the optical afterglow with predictions of the standard beaming model suggests that the rest-frame V-band extinction in the host galaxy is less than or similar to0.03 mag.
dc.fuente.origenWOS
dc.identifier.issn0004-6256
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96714
dc.identifier.wosidWOS:000176888900001
dc.issue.numero2
dc.language.isoen
dc.pagina.final645
dc.pagina.inicio639
dc.revistaAstronomical journal
dc.rightsacceso restringido
dc.subjectgamma rays : bursts
dc.titleThe optical afterglow of the gamma-ray burst GRB 012111
dc.typeartículo
dc.volumen124
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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