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Absolute Rate, Evolving Luminosity function, and Evolving Jet Opening Angle Distribution for Long Gamma-Ray Bursts
Tatsushi Matsubayashi, Ryo Yamazaki, Daisuke Yonetoku +2
Using the luminosity function and the apparent GRB rate inferred from the spectral peak energy-luminosity relation, we investigate the absolute GRB formation rate, taking into acco…
The Reionization History and Early Metal Enrichment inferred from the Gamma-Ray Burst Rate
T. Murakami, D. Yonetoku, M. Umemura +2
Based on the gamma-ray burst (GRB) event rate at redshifts of , which is assessed by the spectral peak energy-to-luminosity relation recently found by Yonetoku et…
A possible observational evidence for angular distribution of opening half-angle of GRB jets
Daisuke Yonetoku, Ryo Yamazaki, Takashi Nakamura +1
We propose a method to estimate the pseudo jet opening half-angle of GRBs using the spectral peak energy ($\Ep$)--peak luminosity relation (so called Yonetoku relation) as well as…
GEOTAIL observation of the SGR1806-20 Giant Flare: The first 600 ms
Toshio Terasawa, Yasuyuki Tanaka, Yasuhiro Takei +14
On December 27, 2004, plasma particle detectors on the GEOTAIL spacecraft detected an extremely strong signal of hard X-ray photons from the giant flare of SGR1806-20, a magnetar c…