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Swift-XRT spectra of GRB 080916A

Last updated after receiving ObsID 00324895018, version 20

Data were analysed using HEASOFT version 6.32

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The spectral fits assume a redshift: 0.689 (GCN 8254)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 73 to 47693 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+116 s

NH (Galactic)1.95 × 1020 cm-2
NH (intrinsic)1.03 (+0.11, -0.11) × 1022 cm-2
z of absorber0.689
Photon index2.16 (+0.08, -0.08)
Flux (0.3-10 keV)
(Observed)
1.05 (+0.05, -0.05) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.71 (+0.09, -0.08) × 10-9 erg cm-2 s-1
Counts to flux (obs)3.37 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.49 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
425.94 (529)
Spectrum exposure173 s

PC mode. Mean photon arrival: T0+9627 s

NH (Galactic)1.95 × 1020 cm-2
NH (intrinsic)8.1 (+2.0, -1.8) × 1021 cm-2
z of absorber0.689
Photon index1.79 (+0.14, -0.14)
Flux (0.3-10 keV)
(Observed)
5.8 (+0.5, -0.5) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
7.6 (+0.6, -0.5) × 10-12 erg cm-2 s-1
Counts to flux (obs)4.10 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.38 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
325.26 (350)
Spectrum exposure9.7 ks

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Late Time spectrum (T0 + 5040 to 47693 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+13251 s

NH (Galactic)1.95 × 1020 cm-2
NH (intrinsic)8.1 (+2.3, -2.0) × 1021 cm-2
z of absorber0.689
Photon index1.96 (+0.17, -0.17)
Flux (0.3-10 keV)
(Observed)
3.4 (+0.4, -0.3) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
4.7 (+0.4, -0.4) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.73 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.24 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
253.74 (286)
Spectrum exposure8.3 ks

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