Figure 1: Light curve and spectral evolution of GRB 050904 as observed by the Burst Alert Telescope (BAT) and the X-ray Telescope (XRT). | Nature

Figure 1: Light curve and spectral evolution of GRB 050904 as observed by the Burst Alert Telescope (BAT) and the X-ray Telescope (XRT).

From: Huge explosion in the early Universe

Figure 1

WT, windowed timing mode data; PC, photon counting data. Top, evolution of the gamma-ray burst (GRB) K-corrected 0.2–10 keV luminosity (the K-correction accounts for the redshift dependence of the luminosity in a given band of wavelengths). Error bars show 90% confidence. Times are referred to the BAT trigger. Rest-frame time is obtained by applying correction factor (1+z)−1 to the observer frame time. Gaps in XRT-PC data correspond to the part of the orbit when the satellite was not observing this GRB. Bottom, change in photon index (Γ, defined by the power law F(E)=EΓ+1, where F(E) is the observed flux of energy E) of GRB 050904 during the observation. Spectra were modelled using a power law with two absorbing components (galactic and intrinsic).

Back to article page