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Swift-XRT spectra of GRB 090823

Last updated after receiving ObsID 00020109003, version 11

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

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

N_H (Galactic)	4.54 × 10²⁰ cm^-2
N_H (intrinsic)	2.6 (+6.0, -2.3) × 10²¹ cm^-2
z of absorber	0
Photon index	2.3 (+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 exposure	4.7 ks