2009ApJ...706L.183U

We present multi-band results for GRB071010B based on Swift, Suzaku, and ground-based optical observations. This burst is an ideal target to evaluate the robustness of the E ^src_peak- E_iso and E ^src_peak- E_γ relations, whose studies have been in stagnation due to the lack of the combined estimation of E ^src_peak and long-term optical monitoring. The joint prompt spectral fitting using Swift/Burst Alert Telescope and Suzaku/Wide-band All-sky Monitor data yielded the spectral peak energy as E ^src_peakof 86.5^+6.4_–6.3 keV and E_isoof 2.25^+0.19_–0.16x 10⁵² erg with z = 0.947. The optical afterglow light curve is well fitted by a simple power law with temporal index α = -0.60±0.02. The lower limit of temporal break in the optical light curve is 9.8 days. Our multi-wavelength analysis reveals that GRB071010B follows E ^src_peak- E_iso but violates the E ^src_peak- E_γ and E_iso- E ^src_peak- t ^src_jet at more than the 3σ level.