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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…
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…
The afterglow of the short/intermediate-duration gamma-ray burst GRB 000301C: A jet at z=2.04
B. L. Jensen, J. U. Fynbo, J. Gorosabel +23
We present Ulysses and NEAR data from the detection of the short or intermediate duration (2 s) gamma-ray burst GRB000301C (2000 March 1.41 UT). The gamma-ray burst (GRB) was local…
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…