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Swift-XRT spectra of GRB 081118

Last updated after receiving ObsID 00334877009, version 15

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 2.58 (GCN 8531)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 159 to 203899 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+189 s

N_H (Galactic)	4.26 × 10²⁰ cm^-2
N_H (intrinsic)	4 (+6, -4) × 10²¹ cm^-2
z of absorber	2.58
Photon index	2.66 (+0.25, -0.22)
Flux (0.3-10 keV) (Observed)	2.68 (+0.28, -0.26) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.6 (+0.5, -0.4) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	2.49 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.34 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	201.17 (206)
Spectrum exposure	91 s

PC mode. Mean photon arrival: T0+32272 s

N_H (Galactic)	4.26 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+8.57 × 10²¹, -0) cm^-2
z of absorber	2.58
Photon index	2.37 (+0.34, -0.17)
Flux (0.3-10 keV) (Observed)	2.34 (+0.30, -0.35) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.74 (+0.50, -0.29) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	2.80 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.28 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	129.76 (140)
Spectrum exposure	46.8 ks

Late Time spectrum (T0 + 4919 to 203899 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+62549 s

N_H (Galactic)	4.26 × 10²⁰ cm^-2
N_H (intrinsic)	9.6 (+16.3, -9.6) × 10²¹ cm^-2
z of absorber	2.58
Photon index	2.3 (+0.4, -0.4)
Flux (0.3-10 keV) (Observed)	1.06 (+0.27, -0.21) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.41 (+0.37, -0.27) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	2.87 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.79 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	63.91 (91)
Spectrum exposure	45.4 ks