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Discovery of a redshifted Iron K-line in the X-ray afterglow of GRB 000214
L. A. Antonelli, L. Piro, M. Vietri +13
We report the detection (3 sigma significance level) of a strong iron emission line in the X-ray spectrum of the afterglow of GRB 000214 (``Valentine's Day Burst'') observed by Bep…
VLT spectroscopy of GRB 990510 and GRB 990712; probing the faint and bright end of the GRB host galaxy population
P. M. Vreeswijk, A. Fruchter, L. Kaper +15
We present time-resolved optical spectroscopy of the afterglows of the gamma-ray bursts GRB 990510 and GRB 990712. Through the identification of several absorption lines in the fir…
The very red afterglow of GRB 000418 - further evidence for dust extinction in a GRB host galaxy
S. Klose, B. Stecklum, N. Masetti +36
We report near-infrared and optical follow-up observations of the afterglow of the Gamma-Ray Burst 000418 starting 2.5 days after the occurrence of the burst and extending over nea…
GRB990712: First Indication of Polarization Variability in a Gamma-ray Burst Afterglow
E. Rol, R. A. M. J. Wijers, P. M. Vreeswijk +9
We report the detection of significant polarization in the optical afterglow of GRB990712 on three instances 0.44, 0.70 and 1.45 days after the gamma-ray burst, with (P, theta) bei…
Discovery of the optical counterpart and early optical observations of GRB990712
Kailash C. Sahu
We present the discovery observations of the optical counterpart of the gamma-ray burster GRB990712 taken 4.16 hours after the outburst and discuss its light curve observed in the…