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Swift-XRT spectra of GRB 090102

Last updated after receiving ObsID 00338895008, version 25

Data were analysed using HEASOFT version 6.32

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The spectral fits assume a redshift: 1.547 (GCN 8766)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 393 to 53551 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+503 s

NH (Galactic)4.69 × 1020 cm-2
NH (intrinsic)7.9 (+2.9, -2.7) × 1021 cm-2
z of absorber1.547
Photon index1.68 (+0.11, -0.10)
Flux (0.3-10 keV)
(Observed)
5.3 (+0.4, -0.4) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
6.2 (+0.3, -0.3) × 10-10 erg cm-2 s-1
Counts to flux (obs)3.97 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.65 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
380.89 (449)
Spectrum exposure240 s

PC mode. Mean photon arrival: T0+15138 s

NH (Galactic)4.69 × 1020 cm-2
NH (intrinsic)7.8 (+2.2, -2.0) × 1021 cm-2
z of absorber1.547
Photon index1.68 (+0.08, -0.08)
Flux (0.3-10 keV)
(Observed)
9.7 (+0.5, -0.5) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.13 (+0.05, -0.05) × 10-11 erg cm-2 s-1
Counts to flux (obs)4.02 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.70 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
470.70 (496)
Spectrum exposure17.6 ks

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Late Time spectrum (T0 + 6179 to 53551 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+22137 s

NH (Galactic)4.69 × 1020 cm-2
NH (intrinsic)7.5 (+2.6, -2.4) × 1021 cm-2
z of absorber1.547
Photon index1.70 (+0.10, -0.10)
Flux (0.3-10 keV)
(Observed)
4.9 (+0.3, -0.3) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.71 (+0.31, -0.29) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.96 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.64 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
415.73 (424)
Spectrum exposure16.8 ks

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