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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 index1.42 (+0.09, -0.09)
Flux (0.3-10 keV)
(Observed)
1.950 (+0.104, -0.099) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.39 (+0.10, -0.10) × 10-9 erg cm-2 s-1
Counts to flux (obs)5.50 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)6.75 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
522.70 (624)
Spectrum exposure84 s

PC mode. Mean photon arrival: T0+8106 s

NH (Galactic)3.16 × 1021 cm-2
NH (intrinsic)0 (+9.79 × 1020, -0) cm-2
z of absorber0
Photon index1.60 (+0.19, -0.10)
Flux (0.3-10 keV)
(Observed)
1.35 (+0.12, -0.14) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.70 (+0.13, -0.15) × 10-12 erg cm-2 s-1
Counts to flux (obs)4.72 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.93 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
271.58 (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 GRB 121108A

PC mode. Mean photon arrival: T0+22037 s

NH (Galactic)3.16 × 1021 cm-2
NH (intrinsic)1.2 (+2.0, -1.2) × 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)
5.7 (+0.8, -0.5) × 10-13 erg cm-2 s-1
Counts to flux (obs)3.95 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)6.17 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
114.34 (156)
Spectrum exposure27.7 ks

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