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Swift-XRT spectra of GRB 170912B

Last updated after receiving ObsID 00772052002, version 16

Data were analysed using HEASOFT version 6.32

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 56 to 23831 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+64 s

N_H (Galactic)	1.73 × 10²² cm^-2
N_H (intrinsic)	3 (+7, -3) × 10²² cm^-2
z of absorber	0
Photon index	1.5 (+1.7, -1.4)
Flux (0.3-10 keV) (Observed)	3.4 (+1.9, -1.2) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	6.3 (+10.4, -2.8) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	7.67 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.44 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	42.81 (56)
Spectrum exposure	15 s

PC mode. Mean photon arrival: T0+2411 s

N_H (Galactic)	1.73 × 10²² cm^-2
N_H (intrinsic)	2.3 (+0.8, -0.7) × 10²² cm^-2
z of absorber	0
Photon index	1.64 (+0.30, -0.28)
Flux (0.3-10 keV) (Observed)	1.74 (+0.18, -0.16) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.3 (+0.9, -0.5) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	8.90 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.71 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	314.28 (391)
Spectrum exposure	6.5 ks

Late Time spectrum (T0 + 4771 to 23831 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+7638 s

N_H (Galactic)	1.73 × 10²² cm^-2
N_H (intrinsic)	3.2 (+1.9, -1.5) × 10²² cm^-2
z of absorber	0
Photon index	2.1 (+0.7, -0.6)
Flux (0.3-10 keV) (Observed)	3.4 (+0.7, -0.6) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.03 (+1.46, -0.46) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	8.01 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	2.44 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	154.93 (152)
Spectrum exposure	5.5 ks