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Table 4

Time-resolved spectral parameters from model fits to GRB time intervals where significant deviations were detected.

GRB Interval* Detectors Model Epeak α β kT Index C-Stat/DOF

GRB 090323 60.4:66.6 n9+nb+b1 Comp 535.70 –0.83 410.14/353
Band 532.00 –0.83 –2.92 409.25/352
Band+BB 426.00 –0.52 –3.00b 4.99 373.13/351
Band+PL 409.20 –0.28 –3.00b –1.75 377.69/351

GRB 090424 2.3:3.3 n6+n7+n8 Comp 169.50 –0.87 738.26/596
+nb+b1 Band 153.00 –0.80 –2.81 729.21/595
Band+BB 176.90 –0.48 –3.10 9.20 662.65/593
Band+PL 153.40 –0.80 –2.82 0.16 729.25/593

GRB 090820a 31.7:36.9 n2+n5+b0 Comp 267.10 -0.58 896.24/357
Band 221.60 –0.45 –2.63 667.45/356
Band+BB 317.20 –0.71 –3.37 28.90 600.59/354
Band+PL

GRB 090902Bc 9.7:10.6 n0+n1+b0 Comp 1695.00 –1.14 1178.7/356
Band 1657.00 –1.14 –3.00b 1198.0/356
Band+BB 917.30 –0.51 –3.00b 5.01 489.48/354
Band+PL 782.00 0.20 –3.00b –2.02 419.13/354

GRB 090926A 9.5:10.5 n3+n6+n7 Comp 331.90 –0.95 639.49/478
+b1 Band 311.40 –0.93 –2.64 628.82/477
Band+BB 392.00 –1.17 –2.35 48.99 592.81/475
Band+PL 265.70 –0.46 –3.35 –1.73 583.77/475

Notes.

(*)

Measured in seconds since trigger time (T0).

(a)

The Band+PL fit for GRB 090820 did not converge to physical parameters and is omitted.

(b)

β was frozen to –3.00 if the uncertainties were unconstrained.

(c)

Although many intervals have significant excesses in GRB 090902B, only one is presented above for illustrative purposes (see also Abdo et al. 2009a; Pe’er et al. 2012; Ryde et al. 2011).

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