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Swift-XRT spectra of GRB 130427B

Last updated after receiving ObsID 00554635007, version 3

Data were analysed using HEASOFT version 6.32

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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)4 (+6, -4) × 1021 cm-2
z of absorber2.78
Photon index1.84 (+0.11, -0.11)
Flux (0.3-10 keV)
(Observed)
5.0 (+0.4, -0.4) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.7 (+0.3, -0.3) × 10-10 erg cm-2 s-1
Counts to flux (obs)3.46 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.93 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
379.50 (415)
Spectrum exposure120 s

PC mode. Mean photon arrival: T0+8833 s

NH (Galactic)5.35 × 1020 cm-2
NH (intrinsic)4.2 (+12.5, -4.2) × 1021 cm-2
z of absorber2.78
Photon index1.73 (+0.20, -0.18)
Flux (0.3-10 keV)
(Observed)
2.7 (+0.4, -0.3) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
3.0 (+0.3, -0.3) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.78 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.23 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
188.21 (213)
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 (+1.53 × 1022, -0) cm-2
z of absorber2.78
Photon index1.82 (+0.31, -0.19)
Flux (0.3-10 keV)
(Observed)
6.6 (+1.2, -1.2) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
7.3 (+1.3, -1.1) × 10-13 erg cm-2 s-1
Counts to flux (obs)3.56 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.94 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
105.24 (109)
Spectrum exposure10.2 ks

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