Infrared/optical – X-ray simultaneous observations of X-ray flares in GRB 071112C and GRB 080506

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Table 4:

Decay and spectral index of the X-ray afterglow of GRB 080506.
Region	T (s)	$\alpha_{\rm X}$ $^{\dag }$ ( $\chi^2$ /d.o.f.)	$\beta_{\rm X}$ $^{\ddag }$
Prompt Emission	145-200	prompt like	-0.38 $\pm$ 0.03
Steep Decay	200-350	-4.8 $\pm$ 0.2(43.3/30)	-1.05 $\pm$ 0.06
Flare Rise	350-474	10.14 $\pm$ 0.72(23.8/6)	-0.80 $\pm$ 0.18
Flare Peak	474-503	-	-1.02 $\pm$ 0.13
Flare Decay	503-672	-6.41 $\pm$ 0.24(50.9/47)	-1.49 $\pm$ 0.10
Normal Decay	10 900-70 300	-0.81 $\pm$ 0.05 (55.7/19)	-1.26 _-0.16^+0.17

Notes. The uncertainties show the 90% confidence levels of the parameters. $^{(\dag )}$ X-ray decay index. $^{(\ddag )}$ X-ray spectral index( $\chi^2$ /d.o.f. = 587.7/298).

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