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Swift-XRT spectra of GRB 090422

Last updated after receiving ObsID 00349931008, version 13

Data were analysed using HEASOFT version 6.32

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Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 70 to 73843 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+76 s

NH (Galactic)2.55 × 1021 cm-2
NH (intrinsic)0 (+4.43 × 1021, -0) cm-2
z of absorber0
Photon index1.9 (+0.9, -0.5)
Flux (0.3-10 keV)
(Observed)
1.7 (+0.8, -0.6) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.24 (+1.28, -0.73) × 10-10 erg cm-2 s-1
Counts to flux (obs)3.37 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.52 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
37.95 (47)
Spectrum exposure14 s

PC mode. Mean photon arrival: T0+14957 s

NH (Galactic)2.55 × 1021 cm-2
NH (intrinsic)2.13 (+1.10, -0.96) × 1021 cm-2
z of absorber0
Photon index2.18 (+0.21, -0.20)
Flux (0.3-10 keV)
(Observed)
1.20 (+0.13, -0.12) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.17 (+0.34, -0.25) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.67 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)6.61 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
254.10 (298)
Spectrum exposure31.0 ks

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Late Time spectrum (T0 + 4295 to 73843 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+22642 s

NH (Galactic)2.55 × 1021 cm-2
NH (intrinsic)2.6 (+1.4, -1.2) × 1021 cm-2
z of absorber0
Photon index2.33 (+0.27, -0.26)
Flux (0.3-10 keV)
(Observed)
6.2 (+0.8, -0.7) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.28 (+0.33, -0.19) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.46 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)7.09 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
188.53 (235)
Spectrum exposure30.1 ks

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