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The Spectroscopic Variability of GRB 021004
T. Matheson, P. M. Garnavich, C. Foltz +9
We present spectra of the optical transient (OT) associated with GRB 021004. The spectra show a blue continuum with superposed absorption features and one emission line. We confirm…
The unusual optical afterglow of the gamma-ray burst GRB 021004: Color changes and short-time-scale variability
D. Bersier, K. Z. Stanek, J. Winn +11
We report UBVRI observations of the optical afterglow of the gamma-ray burst GRB 021004. We observed significant (10-20%) deviations from a power law decay on several time scales,…
Discovery of the Low-Redshift Optical Afterglow of GRB 011121 and Its Progenitor Supernova 2001ke
P. M. Garnavich, K. Z. Stanek, L. Wyrzykowski +10
We present the discovery and follow-up observations of the afterglow of the GRB 011121 and its associated supernova SN 2001ke. Images were obtained with the OGLE 1.3m telescope in…
Discovery of four X-ray quasars behind the Large Magellanic Cloud
A. Dobrzycki, P. J. Groot, L. M. Macri +1
We present the discovery of four X-ray quasars (z_em = 0.26, 0.53, 0.61, 1.63) located behind the Large Magellanic Cloud; three of them are located behind the bar of the LMC. The q…