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Swift-XRT spectra of GRB 090426

Last updated after receiving ObsID 00350479007, version 12

Data were analysed using HEASOFT version 6.32

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The spectral fits assume a redshift: 2.609 (GCN 9264)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 88 to 25404 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+90 s

NH (Galactic)1.58 × 1020 cm-2
NH (intrinsic)0 (+2.56 × 1022, -0) cm-2
z of absorber2.609
Photon index1.6 (+0.9, -0.9)
Flux (0.3-10 keV)
(Observed)
1.41 (+2.68, -0.70) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.52 (+2.57, -0.77) × 10-10 erg cm-2 s-1
Counts to flux (obs)4.05 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.37 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
5.83 (8)
Spectrum exposure7 s

PC mode. Mean photon arrival: T0+2229 s

NH (Galactic)1.58 × 1020 cm-2
NH (intrinsic)6 (+6, -6) × 1021 cm-2
z of absorber2.609
Photon index1.95 (+0.16, -0.15)
Flux (0.3-10 keV)
(Observed)
4.4 (+0.5, -0.4) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
4.9 (+0.4, -0.4) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.30 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.66 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
213.28 (264)
Spectrum exposure6.8 ks

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Late Time spectrum (T0 + 5463 to 25404 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+9056 s

NH (Galactic)1.58 × 1020 cm-2
NH (intrinsic)4.5 (+15.6, -4.5) × 1021 cm-2
z of absorber2.609
Photon index1.82 (+0.36, -0.29)
Flux (0.3-10 keV)
(Observed)
1.18 (+0.31, -0.25) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.27 (+0.27, -0.23) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.54 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.82 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
78.07 (87)
Spectrum exposure4.6 ks

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