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Swift-XRT spectra of GRB 081118

Last updated after receiving ObsID 00334877009, version 15

Data were analysed using HEASOFT version 6.29

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The spectral fits assume a redshift: 2.58 (GCN 8531)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 159 to 203899 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+189 s

NH (Galactic)4.26 × 1020 cm-2
NH (intrinsic)4 (+6, -4) × 1021 cm-2
z of absorber2.58
Photon index2.66 (+0.25, -0.22)
Flux (0.3-10 keV)
(Observed)
1.95 (+0.20, -0.19) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.62 (+0.40, -0.29) × 10-10 erg cm-2 s-1
Counts to flux (obs)2.49 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.34 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
201.17 (206)
Spectrum exposure91 s

PC mode. Mean photon arrival: T0+30079 s

NH (Galactic)4.26 × 1020 cm-2
NH (intrinsic)5 (+90, -5) × 1020 cm-2
z of absorber2.58
Photon index2.41 (+0.32, -0.19)
Flux (0.3-10 keV)
(Observed)
2.4 (+0.3, -0.3) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.9 (+0.5, -0.3) × 10-13 erg cm-2 s-1
Counts to flux (obs)2.76 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.32 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
133.08 (147)
Spectrum exposure46.8 ks

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Late Time spectrum (T0 + 4919 to 203899 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+62549 s

NH (Galactic)4.26 × 1020 cm-2
NH (intrinsic)9.6 (+16.3, -9.6) × 1021 cm-2
z of absorber2.58
Photon index2.3 (+0.4, -0.4)
Flux (0.3-10 keV)
(Observed)
1.06 (+0.27, -0.21) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.41 (+0.37, -0.27) × 10-13 erg cm-2 s-1
Counts to flux (obs)2.87 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.79 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
63.91 (91)
Spectrum exposure45.4 ks

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