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Swift-XRT spectra of GRB 090817

Last updated after receiving ObsID 00020108007, version 14

Data were analysed using HEASOFT version 6.35.2

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Add time-sliced spectrum.

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

Download spectral files for Time-averaged spectrum.

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PC mode spectrum of Time-averaged

WT mode. Mean photon arrival: T0+11008 s

Can't find a valid fit for this spectrum

PC mode. Mean photon arrival: T0+25452 s

N_H (Galactic)	5.46 × 10²¹ cm^-2
N_H (intrinsic)	10 (+7, -6) × 10²¹ cm^-2
z of absorber	0
Photon index	2.2 (+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 exposure	5.8 ks