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Swift-XRT spectra of GRB 120404A

Last updated after receiving ObsID 00519380006, version 13

Data were analysed using HEASOFT version 6.29

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The spectral fits assume a redshift: 2.87 (GCN 13217)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 136 to 33853 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+176 s

NH (Galactic)3.98 × 1020 cm-2
NH (intrinsic)0 (+6.78 × 1021, -0) cm-2
z of absorber2.87
Photon index1.646 (+0.136, -0.088)
Flux (0.3-10 keV)
(Observed)
3.44 (+0.29, -0.33) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
3.65 (+0.31, -0.29) × 10-10 erg cm-2 s-1
Counts to flux (obs)3.74 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.97 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
261.38 (356)
Spectrum exposure99 s

PC mode. Mean photon arrival: T0+4519 s

NH (Galactic)3.98 × 1020 cm-2
NH (intrinsic)8 (+7, -6) × 1021 cm-2
z of absorber2.87
Photon index1.83 (+0.12, -0.11)
Flux (0.3-10 keV)
(Observed)
7.6 (+0.6, -0.6) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
8.6 (+0.6, -0.5) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.55 × 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?
335.49 (347)
Spectrum exposure7.8 ks

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Late Time spectrum (T0 + 4740 to 33853 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+7686 s

NH (Galactic)3.98 × 1020 cm-2
NH (intrinsic)9 (+9, -8) × 1021 cm-2
z of absorber2.87
Photon index2.02 (+0.17, -0.16)
Flux (0.3-10 keV)
(Observed)
3.3 (+0.4, -0.3) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
3.9 (+0.3, -0.3) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.22 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.84 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
252.53 (249)
Spectrum exposure6.6 ks

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