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Swift-XRT spectra of GRB 081121

Last updated after receiving ObsID 00335105013, version 19

Data were analysed using HEASOFT version 6.28

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The spectral fits assume a redshift: 2.512 (GCN 8542)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 2816 to 40099 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+2820 s

NH (Galactic)4.75 × 1020 cm-2
NH (intrinsic)0 (+1.39 × 1022, -0) cm-2
z of absorber2.512
Photon index1.28 (+1.02, -0.46)
Flux (0.3-10 keV)
(Observed)
4.6 (+1.8, -2.0) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
4.8 (+2.0, -1.8) × 10-10 erg cm-2 s-1
Counts to flux (obs)4.44 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.54 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
21.20 (27)
Spectrum exposure7 s

PC mode. Mean photon arrival: T0+12476 s

NH (Galactic)4.75 × 1020 cm-2
NH (intrinsic)1.5 (+2.2, -1.5) × 1021 cm-2
z of absorber2.512
Photon index1.85 (+0.08, -0.08)
Flux (0.3-10 keV)
(Observed)
2.32 (+0.13, -0.12) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.65 (+0.12, -0.11) × 10-11 erg cm-2 s-1
Counts to flux (obs)3.58 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.09 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
378.10 (447)
Spectrum exposure8.3 ks

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Late Time spectrum (T0 + 4000 to 40099 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+14205 s

NH (Galactic)4.75 × 1020 cm-2
NH (intrinsic)2.5 (+2.3, -2.2) × 1021 cm-2
z of absorber2.512
Photon index1.88 (+0.08, -0.08)
Flux (0.3-10 keV)
(Observed)
1.70 (+0.10, -0.09) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.97 (+0.09, -0.09) × 10-11 erg cm-2 s-1
Counts to flux (obs)3.53 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.10 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
375.01 (442)
Spectrum exposure7.1 ks

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