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Swift-XRT spectra of GRB 091020

Last updated after receiving ObsID 00373458016, version 13

Data were analysed using HEASOFT version 6.32

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The spectral fits assume a redshift: 1.71 (GCN 10053)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 87 to 64740 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+201 s

NH (Galactic)1.45 × 1020 cm-2
NH (intrinsic)7.9 (+1.5, -1.4) × 1021 cm-2
z of absorber1.71
Photon index1.87 (+0.06, -0.06)
Flux (0.3-10 keV)
(Observed)
5.18 (+0.21, -0.21) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
6.10 (+0.20, -0.19) × 10-10 erg cm-2 s-1
Counts to flux (obs)3.47 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.08 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
505.31 (573)
Spectrum exposure346 s

PC mode. Mean photon arrival: T0+16719 s

NH (Galactic)1.45 × 1020 cm-2
NH (intrinsic)8.4 (+1.7, -1.6) × 1021 cm-2
z of absorber1.71
Photon index2.02 (+0.08, -0.07)
Flux (0.3-10 keV)
(Observed)
5.36 (+0.26, -0.24) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
6.60 (+0.26, -0.25) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.25 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.01 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
430.77 (468)
Spectrum exposure28.0 ks

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Late Time spectrum (T0 + 4883 to 64740 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+22111 s

NH (Galactic)1.45 × 1020 cm-2
NH (intrinsic)8.2 (+2.0, -1.9) × 1021 cm-2
z of absorber1.71
Photon index2.03 (+0.09, -0.09)
Flux (0.3-10 keV)
(Observed)
3.61 (+0.20, -0.19) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
4.45 (+0.21, -0.20) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.24 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.99 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
369.33 (419)
Spectrum exposure26.9 ks

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