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Swift-XRT spectra of GRB 110818A

Last updated after receiving ObsID 00500914005, version 16

Data were analysed using HEASOFT version 6.32

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The spectral fits assume a redshift: 3.36 (GCN 12284)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 384 to 66418 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+411 s

NH (Galactic)2.93 × 1020 cm-2
NH (intrinsic)5.3 (+13.4, -5.3) × 1021 cm-2
z of absorber3.36
Photon index2.07 (+0.25, -0.20)
Flux (0.3-10 keV)
(Observed)
1.99 (+0.30, -0.28) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.25 (+0.26, -0.25) × 10-10 erg cm-2 s-1
Counts to flux (obs)2.97 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.37 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
173.11 (201)
Spectrum exposure61 s

PC mode. Mean photon arrival: T0+6648 s

NH (Galactic)2.93 × 1020 cm-2
NH (intrinsic)1.4 (+0.8, -0.7) × 1022 cm-2
z of absorber3.36
Photon index1.840 (+0.101, -0.097)
Flux (0.3-10 keV)
(Observed)
3.90 (+0.27, -0.25) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
4.42 (+0.24, -0.23) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.55 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.03 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
354.26 (397)
Spectrum exposure22.2 ks

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Late Time spectrum (T0 + 6160 to 66418 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+20448 s

NH (Galactic)2.93 × 1020 cm-2
NH (intrinsic)1.7 (+1.6, -1.4) × 1022 cm-2
z of absorber3.36
Photon index1.95 (+0.20, -0.19)
Flux (0.3-10 keV)
(Observed)
1.02 (+0.14, -0.12) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.20 (+0.13, -0.12) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.35 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.96 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
185.10 (216)
Spectrum exposure19.8 ks

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