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Swift-XRT spectra of GRB 121108A

Last updated after receiving ObsID 00537921006, version 5.

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Time-averaged spectrum (T0 + 60 to 76788 s)

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WT and PC mode spectra of GRB 121108A

WT mode. Mean photon arrival: T0+131 s

NH (Galactic)3.16 × 1021 cm-2
NH (intrinsic)1.3 (+0.7, -0.6) × 1021 cm-2
z of absorber0
Photon index1.44 (+0.09, -0.09)
Flux (0.3-10 keV)
(Observed)
1.920 (+0.101, -0.097) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.37 (+0.10, -0.09) × 10-9 erg cm-2 s-1
Counts to flux (obs)5.41 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)6.69 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
520.31 (624)
Spectrum exposure84 s

PC mode. Mean photon arrival: T0+8107 s

NH (Galactic)3.16 × 1021 cm-2
NH (intrinsic)0 (+1.07 × 1021, -0) cm-2
z of absorber0
Photon index1.63 (+0.19, -0.12)
Flux (0.3-10 keV)
(Observed)
1.34 (+0.14, -0.14) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.70 (+0.16, -0.12) × 10-12 erg cm-2 s-1
Counts to flux (obs)4.62 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.87 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
268.54 (318)
Spectrum exposure29.4 ks

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Late Time spectrum (T0 + 5197 to 76788 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+22042 s

NH (Galactic)3.16 × 1021 cm-2
NH (intrinsic)1.3 (+2.0, -1.3) × 1021 cm-2
z of absorber0
Photon index2.0 (+0.4, -0.3)
Flux (0.3-10 keV)
(Observed)
3.6 (+0.8, -0.6) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.81 (+1.47, -0.91) × 10-13 erg cm-2 s-1
Counts to flux (obs)3.83 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)6.14 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
111.64 (156)
Spectrum exposure27.7 ks

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