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Swift-XRT spectra of GRB 090817

Last updated after receiving ObsID 00020108007, version 14

Data were analysed using HEASOFT version 6.29

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Time-averaged spectrum (T0 + 11005 to 57842 s)

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PC mode spectrum of Time-averaged

PC mode. Mean photon arrival: T0+25452 s

NH (Galactic)5.46 × 1021 cm-2
NH (intrinsic)10 (+7, -6) × 1021 cm-2
z of absorber0
Photon index2.2 (+0.6, -0.5)
Flux (0.3-10 keV)
(Observed)
1.6 (+0.4, -0.3) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
4.1 (+4.0, -1.4) × 10-12 erg cm-2 s-1
Counts to flux (obs)4.73 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)1.20 × 10-10 erg cm-2 ct-1
W-stat (dof)
What's this?
126.94 (126)
Spectrum exposure5.8 ks