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Swift-XRT spectra of GRB 130427B

Last updated after receiving ObsID 00554635007, version 2

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The spectral fits assume a redshift: 2.78 (GCN 14493)

Jump to: Time-averaged|Late Time

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

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+130 s

NH (Galactic)5.35 × 1020 cm-2
NH (intrinsic)8 (+39, -8) × 1020 cm-2
z of absorber2.78
Photon index1.867 (+0.112, -0.088)
Flux (0.3-10 keV)
(Observed)
4.6 (+0.3, -0.3) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.26 (+0.30, -0.29) × 10-10 erg cm-2 s-1
Counts to flux (obs)3.40 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.90 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
414.02 (412)
Spectrum exposure120 s

PC mode. Mean photon arrival: T0+7564 s

NH (Galactic)5.35 × 1020 cm-2
NH (intrinsic)1.8 (+7.0, -1.8) × 1021 cm-2
z of absorber2.78
Photon index1.76 (+0.18, -0.15)
Flux (0.3-10 keV)
(Observed)
2.53 (+0.33, -0.30) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.87 (+0.30, -0.27) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.76 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.27 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
217.55 (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 (+9.79 × 1021, -0) cm-2
z of absorber2.78
Photon index1.85 (+0.31, -0.19)
Flux (0.3-10 keV)
(Observed)
6.0 (+1.0, -1.1) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
6.80 (+1.15, -0.98) × 10-13 erg cm-2 s-1
Counts to flux (obs)3.54 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.01 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
105.60 (109)
Spectrum exposure10.2 ks

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