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Fig. 1.
Top: distributions of αBand for SGRBs (green) and for both LGRBs with and without the low-energy spectral break (orange and blue histogram). Bottom: distributions of α1,2SBPL and α2,2SBPL of the 12 LGRBs best fitted by the 2SBPL (i.e., with the low-energy spectral break). Distributions are normalized to their peak values.
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