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Afterglow spectrum of a gamma-ray burst with the highest known redshift z=6.295
N. Kawai, G. Kosugi, K. Aoki +25
Gamma-ray bursts (GRBs) and their afterglows have been proposed as an excellent probe to study the evolution of cosmic star formation, the reionization of the intergalactic medium,…
HETE-2 Localization and Observations of the Gamma-Ray Burst GRB 020813
R. Sato, the HETE Science Team
A bright, long gamma-ray burst (GRB) was detected and localized by the instruments on board the High Energy Transient Explorer 2 satellite (HETE-2) at 02:44:19.17 UTC (9859.17 s UT…
Discovery of the short gamma-ray burst GRB 050709
J. S. Villasenor, D. Q. Lamb, G. R. Ricker +30
Gamma-Ray Bursts (GRBs) fall into two classes: short-hard and long-soft bursts. The latter are now known to have X-ray and optical afterglows, to occur at cosmological distances in…
GRBs Optical follow-up observation at Lulin observatory, Taiwan
K. Y. Huang, Y. Urata, W. H. Ip +3
The Lulin GRB program, using the Lulin One-meter Telescope (LOT) in Taiwan started in July 2003. Its scientific aims are to discover optical counterparts of XRFs and short and long…
The search for optical emission on and before the GRB trigger with the WIDGET telescope
T. Tamagawa, F. Usui, Y. Urata +11
WIDGET is a robotic telescope for monitoring the HETE-2 field-of-view to detect Gamma-ray Burst optical flashes or possible optical precursors. The system has 62degx62deg wide fiel…
GRB follow-up observations in the East-Asian region
Y. Urata, K. Y. Huang, W. H. Ip +6
In 2004, we established a Japan-Taiwan-China collaboration for GRB study in the East-Asian region. This serves as a valuable addition to the world-wide optical and infrared follow-…