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Swift-XRT spectra of GRB 120422A

Last updated after receiving ObsID 00520658027, version 5

Data were analysed using HEASOFT version 6.35.2

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The spectral fits assume a redshift: 0.28 (GCN 13251)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 101 to 40849 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+119 s

NH (Galactic)4.25 × 1020 cm-2
NH (intrinsic)2.6 (+0.6, -0.5) × 1021 cm-2
z of absorber0.28
Photon index4.12 (+0.27, -0.24)
Flux (0.3-10 keV)
(Observed)
5.07 (+0.24, -0.23) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.2 (+0.7, -0.5) × 10-9 erg cm-2 s-1
Counts to flux (obs)2.14 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)9.42 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
205.96 (210)
Spectrum exposure71 s

PC mode. Mean photon arrival: T0+11155 s

NH (Galactic)4.25 × 1020 cm-2
NH (intrinsic)0 (+1.04 × 1021, -0) cm-2
z of absorber0.28
Photon index2.19 (+0.43, -0.15)
Flux (0.3-10 keV)
(Observed)
4.9 (+0.7, -0.9) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.5 (+1.0, -0.6) × 10-13 erg cm-2 s-1
Counts to flux (obs)2.95 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.29 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
78.81 (115)
Spectrum exposure14.6 ks

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Late Time spectrum (T0 + 4635 to 40849 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+17583 s

NH (Galactic)4.25 × 1020 cm-2
NH (intrinsic)0 (+1.86 × 1021, -0) cm-2
z of absorber0.28
Photon index1.88 (+0.47, -0.25)
Flux (0.3-10 keV)
(Observed)
3.3 (+0.7, -0.8) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
3.6 (+0.8, -0.6) × 10-13 erg cm-2 s-1
Counts to flux (obs)3.43 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.75 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
62.72 (83)
Spectrum exposure13.5 ks

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