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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

NH (Galactic)1.73 × 1022 cm-2
NH (intrinsic)3 (+7, -3) × 1022 cm-2
z of absorber0
Photon index1.5 (+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 exposure15 s

PC mode. Mean photon arrival: T0+2411 s

NH (Galactic)1.73 × 1022 cm-2
NH (intrinsic)2.3 (+0.8, -0.7) × 1022 cm-2
z of absorber0
Photon index1.64 (+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 exposure6.5 ks

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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

NH (Galactic)1.73 × 1022 cm-2
NH (intrinsic)3.2 (+1.9, -1.5) × 1022 cm-2
z of absorber0
Photon index2.1 (+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 exposure5.5 ks

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