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Swift-XRT spectra of GRB 071031

Last updated after receiving ObsID 00295670007, version 22

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 2.69 (GCN 7023)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 109 to 45273 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+299 s

N_H (Galactic)	1.25 × 10²⁰ cm^-2
N_H (intrinsic)	1.17 (+0.14, -0.13) × 10²² cm^-2
z of absorber	2.69
Photon index	1.897 (+0.029, -0.029)
Flux (0.3-10 keV) (Observed)	1.095 (+0.021, -0.020) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.250 (+0.019, -0.019) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.36 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.84 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	634.26 (711)
Spectrum exposure	646 s

PC mode. Mean photon arrival: T0+6201 s

N_H (Galactic)	1.25 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+7.38 × 10²¹, -0) cm^-2
z of absorber	2.69
Photon index	1.72 (+0.18, -0.12)
Flux (0.3-10 keV) (Observed)	2.81 (+0.29, -0.33) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.88 (+0.32, -0.29) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.69 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.78 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	200.74 (225)
Spectrum exposure	12.6 ks

Late Time spectrum (T0 + 4551 to 45273 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+20305 s

N_H (Galactic)	1.25 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+1.36 × 10²², -0) cm^-2
z of absorber	2.69
Photon index	1.63 (+0.35, -0.20)
Flux (0.3-10 keV) (Observed)	5.3 (+1.0, -1.1) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.4 (+1.2, -1.1) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	3.88 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.97 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	70.72 (96)
Spectrum exposure	12.2 ks