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Swift-XRT spectra of GRB 130427B

Last updated after receiving ObsID 00554635007, version 2.

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Time-averaged spectrum (T0 + 83 to 121728 s)

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WT and PC mode spectra of GRB 130427B

WT mode. Mean photon arrival: T0+130 s

NH (Galactic)5.35 × 1020 cm-2
NH (intrinsic)2.4 (+31.8, -2.4) × 1019 cm-2
z of absorber0
Photon index1.818 (+0.124, -0.078)
Flux (0.3-10 keV)
(Observed)
4.66 (+0.28, -0.35) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.17 (+0.31, -0.30) × 10-10 erg cm-2 s-1
Counts to flux (obs)3.46 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.84 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
411.91 (412)
Spectrum exposure120 s

PC mode. Mean photon arrival: T0+7564 s

NH (Galactic)5.35 × 1020 cm-2
NH (intrinsic)1.1 (+5.7, -1.1) × 1020 cm-2
z of absorber0
Photon index1.72 (+0.20, -0.15)
Flux (0.3-10 keV)
(Observed)
2.6 (+0.3, -0.3) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.83 (+0.30, -0.25) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.81 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.21 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
217.28 (234)
Spectrum exposure11.4 ks

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Late Time spectrum (T0 + 11565 to 121728 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+20100 s

NH (Galactic)5.35 × 1020 cm-2
NH (intrinsic)0 (+8.07 × 1020, -0) cm-2
z of absorber0
Photon index1.80 (+0.35, -0.18)
Flux (0.3-10 keV)
(Observed)
6.07 (+0.94, -1.13) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
6.73 (+1.08, -0.97) × 10-13 erg cm-2 s-1
Counts to flux (obs)3.58 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.97 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
105.62 (109)
Spectrum exposure10.2 ks

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