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Swift-XRT spectra of GRB 081121

Last updated after receiving ObsID 00335105013, version 19

Data were analysed using HEASOFT version 6.32

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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 (+1.89 × 1022, -0) cm-2
z of absorber2.512
Photon index1.3 (+0.9, -0.4)
Flux (0.3-10 keV)
(Observed)
2.95 (+1.63, -0.72) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
3.2 (+1.5, -1.2) × 10-10 erg cm-2 s-1
Counts to flux (obs)3.99 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.35 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
20.95 (27)
Spectrum exposure7 s

PC mode. Mean photon arrival: T0+12352 s

NH (Galactic)4.75 × 1020 cm-2
NH (intrinsic)2.2 (+3.4, -2.2) × 1021 cm-2
z of absorber2.512
Photon index1.81 (+0.08, -0.08)
Flux (0.3-10 keV)
(Observed)
2.67 (+0.15, -0.14) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.97 (+0.13, -0.13) × 10-11 erg cm-2 s-1
Counts to flux (obs)3.61 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.02 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
362.92 (446)
Spectrum exposure8.3 ks

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Late Time spectrum (T0 + 4001 to 40099 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+14251 s

NH (Galactic)4.75 × 1020 cm-2
NH (intrinsic)3 (+4, -3) × 1021 cm-2
z of absorber2.512
Photon index1.82 (+0.09, -0.08)
Flux (0.3-10 keV)
(Observed)
2.07 (+0.12, -0.12) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.32 (+0.11, -0.11) × 10-11 erg cm-2 s-1
Counts to flux (obs)3.59 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.03 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
351.83 (434)
Spectrum exposure7.1 ks

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