Table 2: Our sample of X-ray flares with known redshift and published light curves. $t_{\rm p}$ is the time of the X-ray flare peak, $t_{\rm f}$ is the flare duration, $\Delta t/t$ is the duration-to-flare time ratio, and $L_{\rm p}$ is the peak luminosity of X-ray flares evaluated as $L_{\rm p}= 4 \pi D_l^2 F_{0.2{-}10.0~{\rm keV}}(1+z)^{(2-\gamma)}$ with $\gamma $ the power law photon index.
Name Redshift $t_{\rm p}$ $t_{\rm f}$ $\Delta t/t$ $L_{\rm p}$ References
  z [s] [s]   $[\rm erg~s^{-1}]$  
GRB050406 2.44 $211 \pm 5$ $17.9^{\rm +12.3}_{-4.6}$ 0.882 $2.3\times10^{\rm 49}$ [1]
GRB050724 0.26 $275 \pm 5$ $30.6^{\rm +6.6}_{-6.0}$ - $3.5 \times 10^{\rm 47}$ [2], [3]
  - $327^{\rm +6}_{-9}$ $12.7^{\rm +6.3}_{-5.0}$ - $1.6 \times 10^{\rm 47}$ -
GRB050730 3.97 $131.8^{\rm +12.7}_{-59.6}$ $32.7^{\rm +24.4}_{-8.3}$ - $1.0\times10^{\rm 50}$ [4]
  - $234.2^{\rm +2.7}_{-2.4}$ $14.5^{\rm +3}_{-2.8}$ - $8.3\times10^{\rm 49}$ -
  - $436.5^{\rm +1.5}_{-2.2}$ $32.7^{\rm +24.4}_{-8.3}$ - $1.1\times10^{\rm 50}$ -
  - $685.8^{\rm +2.8}_{-2.7}$ $23.8^{\rm +3.9}_{-3.5}$ - $7.8\times10^{\rm 49}$ -
GRB050802 1.71 $464 \pm 31$ $100^{\rm +33}_{-40}$ 2.327 $4.3 \times 10^{\rm 48}$ [2], [3]
GRB050820A 2.61 $241^{\rm +0}_{-1}$ $9.5^{\rm +0.3}_{-0.2}$ - $1.2\times10^{\rm 50}$ [5]
GRB050904 6.3 $448.6^{\rm +3.7}_{-4.0}$ $45.9^{\rm +4.5}_{-3.8}$ - $8.1\times10^{\rm 50}$ [6]
  6.3 $975.5^{\rm +38.5}_{-32.5}$ $62.8^{\rm +36.9}_{-32.5}$ - $8.5\times10^{\rm 49}$ -
  6.3 $1265.5^{\rm +28.0}_{-27.0}$ $81.6^{\rm +30.1}_{-28.2}$ - $8.7\times10^{\rm 49}$ -
GRB060108 2.03 $303.5^{\rm +23.5}_{-24.5}$ $44.5^{\rm +125.5}_{-30.5}$ 1.405 $4.0\times10^{47}$ [7]
References: [1] Romano et al. (2006); [2] Chincarini et al. (2007b); [3] Falcone et al. (2007); [4] Perri et al. (2007); [5] Cenko et al. (2006) ; [6] Cusumano et al. (2007); [7] Oates et al. (2006).


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