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Swift-XRT spectra of GRB 090424

Last updated after receiving ObsID 00350311055, version 10

Data were analysed using HEASOFT version 6.29

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The spectral fits assume a redshift: 0.544 (GCN 9243)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 90 to 36703 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+633 s

NH (Galactic)2.02 × 1020 cm-2
NH (intrinsic)5.25 (+0.25, -0.25) × 1021 cm-2
z of absorber0.544
Photon index1.959 (+0.028, -0.027)
Flux (0.3-10 keV)
(Observed)
9.07 (+0.15, -0.15) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.238 (+0.018, -0.018) × 10-9 erg cm-2 s-1
Counts to flux (obs)3.58 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.88 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
798.22 (762)
Spectrum exposure1.7 ks

PC mode. Mean photon arrival: T0+14708 s

NH (Galactic)2.02 × 1020 cm-2
NH (intrinsic)6.0 (+1.0, -0.9) × 1021 cm-2
z of absorber0.544
Photon index1.87 (+0.09, -0.09)
Flux (0.3-10 keV)
(Observed)
2.85 (+0.17, -0.16) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
3.82 (+0.19, -0.17) × 10-11 erg cm-2 s-1
Counts to flux (obs)3.88 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.19 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
433.47 (468)
Spectrum exposure5.6 ks

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Late Time spectrum (T0 + 5556 to 36703 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+16444 s

NH (Galactic)2.02 × 1020 cm-2
NH (intrinsic)5.93 (+1.04, -0.97) × 1021 cm-2
z of absorber0.544
Photon index1.871 (+0.101, -0.096)
Flux (0.3-10 keV)
(Observed)
2.45 (+0.16, -0.14) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
3.27 (+0.17, -0.16) × 10-11 erg cm-2 s-1
Counts to flux (obs)3.86 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.16 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
393.39 (448)
Spectrum exposure5.1 ks

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