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Swift-XRT spectra of GRB 110820A

Last updated after receiving ObsID 00501095006, version 10.

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Time-averaged spectrum (T0 + 82 to 24532 s)

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WT and PC mode spectra of GRB 110820A

WT mode. Mean photon arrival: T0+247 s

NH (Galactic)3 × 1021 cm-2
NH (intrinsic)3.0 (+0.6, -0.6) × 1021 cm-2
z of absorber0
Photon index1.26 (+0.07, -0.07)
Flux (0.3-10 keV)
(Observed)
4.71 (+0.16, -0.16) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.94 (+0.17, -0.17) × 10-9 erg cm-2 s-1
Counts to flux (obs)7 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)9 × 10-11 erg cm-2 ct-1
C-stat (dof)749.17 (764)
Exposure time110 s

PC mode. Mean photon arrival: T0+4730 s

NH (Galactic)3 × 1021 cm-2
NH (intrinsic)1.7 (+1.6, -1.4) × 1021 cm-2
z of absorber0
Photon index1.82 (+0.28, -0.26)
Flux (0.3-10 keV)
(Observed)
3.5 (+0.5, -0.4) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.55 (+1.10, -0.47) × 10-12 erg cm-2 s-1
Counts to flux (obs)5 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)8 × 10-11 erg cm-2 ct-1
C-stat (dof)193.13 (247)
Exposure time9.9 ks

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Late Time spectrum (T0 + 4885 to 24532 s)

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PC mode spectrum of GRB 110820A

PC mode. Mean photon arrival: T0+13127 s

NH (Galactic)3 × 1021 cm-2
NH (intrinsic)1.8 (+2.4, -1.8) × 1021 cm-2
z of absorber0
Photon index2.6 (+0.6, -0.5)
Flux (0.3-10 keV)
(Observed)
6.0 (+1.5, -1.2) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.80 (+1.63, -0.51) × 10-12 erg cm-2 s-1
Counts to flux (obs)3 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)1.0 × 10-10 erg cm-2 ct-1
C-stat (dof)85.98 (97)
Exposure time8.7 ks

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