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Swift-XRT spectra of GRB 130427B

Last updated after receiving ObsID 00554635007, version 2

Data were analysed using HEASOFT version 6.22

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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 121746 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)1.5 (+5.8, -1.5) × 1021 cm-2
z of absorber2.78
Photon index1.834 (+0.113, -0.090)
Flux (0.3-10 keV)
(Observed)
5.1 (+0.4, -0.4) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.8 (+0.3, -0.3) × 10-10 erg cm-2 s-1
Counts to flux (obs)3.44 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.85 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
412.46 (412)
Spectrum exposure120 s

PC mode. Mean photon arrival: T0+7564 s

NH (Galactic)5.35 × 1020 cm-2
NH (intrinsic)3.0 (+10.6, -3.0) × 1021 cm-2
z of absorber2.78
Photon index1.73 (+0.18, -0.15)
Flux (0.3-10 keV)
(Observed)
2.50 (+0.32, -0.29) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.77 (+0.28, -0.27) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.79 × 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?
217.16 (234)
Spectrum exposure11.4 ks

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Late Time spectrum (T0 + 11565 to 121746 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 (+1.48 × 1022, -0) cm-2
z of absorber2.78
Photon index1.81 (+0.31, -0.19)
Flux (0.3-10 keV)
(Observed)
6.0 (+1.1, -1.1) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
6.7 (+1.1, -1.2) × 10-13 erg cm-2 s-1
Counts to flux (obs)3.57 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.95 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
105.60 (109)
Spectrum exposure10.2 ks

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