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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,…
The Optical Afterglows of Gamma-Ray Bursts
S. T. Holland
The optical afterglows of gamma-ray bursts can be used to probe the physics, geometry, and environments of gamma-ray bursts. In this article I discuss the how spectra and photometr…
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…
The Optical Afterglow of GRB 011211
Stephen T. Holland, I. Soszynski, Michael D. Gladders +6
We 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…
Fundamental parameters of Cepheids. V. Additional photometry and radial velocity for southern Cepheids
D. Bersier
I present photometric and radial velocity data for Galactic Cepheids, most of them being in the southern hemisphere. There are 1250 Geneva 7-color photometric measurements for 62 C…