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Swift-XRT spectra of GRB 090823

Last updated after receiving ObsID 00020109003, version 11

Data were analysed using HEASOFT version 6.35.2

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Time-averaged spectrum (T0 + 108378 to 116628 s)

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PC mode spectrum of Time-averaged

PC mode. Mean photon arrival: T0+112603 s

NH (Galactic)4.54 × 1020 cm-2
NH (intrinsic)2.6 (+6.0, -2.3) × 1021 cm-2
z of absorber0
Photon index2.3 (+1.5, -1.0)
Flux (0.3-10 keV)
(Observed)		1.89 (+1.55, -0.80) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)		3.4 (+5.5, -1.4) × 10-13 erg cm-2 s-1
Counts to flux (obs)3.10 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.56 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?		15.68 (16)
Spectrum exposure4.7 ks