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Swift-XRT spectra of GRB 120907A

Last updated after receiving ObsID 00532871005, version 15

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 0.97 (GCN 13723)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 85 to 64647 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+88 s

N_H (Galactic)	7.26 × 10²⁰ cm^-2
N_H (intrinsic)	1.4 (+1.9, -1.4) × 10²² cm^-2
z of absorber	0.97
Photon index	4.8 (+19.2, -3.0)
Flux (0.3-10 keV) (Observed)	4.9 (+6.5, -2.5) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.0 (+5.8, -1.4) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	1.64 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.65 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	5.26 (9)
Spectrum exposure	6 s

PC mode. Mean photon arrival: T0+13935 s

N_H (Galactic)	7.26 × 10²⁰ cm^-2
N_H (intrinsic)	1.6 (+1.2, -1.1) × 10²¹ cm^-2
z of absorber	0.97
Photon index	1.74 (+0.09, -0.09)
Flux (0.3-10 keV) (Observed)	3.72 (+0.24, -0.23) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.32 (+0.22, -0.21) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.87 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.49 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	382.09 (446)
Spectrum exposure	27.4 ks

Late Time spectrum (T0 + 4516 to 64647 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+21820 s

N_H (Galactic)	7.26 × 10²⁰ cm^-2
N_H (intrinsic)	1.5 (+1.5, -1.4) × 10²¹ cm^-2
z of absorber	0.97
Photon index	1.69 (+0.12, -0.12)
Flux (0.3-10 keV) (Observed)	2.12 (+0.18, -0.17) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.43 (+0.16, -0.15) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.99 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.57 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	331.81 (376)
Spectrum exposure	26.4 ks