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Swift-XRT spectra of GRB 120909A

Last updated after receiving ObsID 00533060005, version 14

Data were analysed using HEASOFT version 6.29

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The spectral fits assume a redshift: 3.93 (GCN 13730)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 3307 to 40522 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+3332 s

NH (Galactic)8.84 × 1020 cm-2
NH (intrinsic)5.7 (+106.0, -5.7) × 1021 cm-2
z of absorber3.93
Photon index2.1 (+0.9, -0.5)
Flux (0.3-10 keV)
(Observed)
4.3 (+2.0, -1.6) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.3 (+2.1, -1.5) × 10-11 erg cm-2 s-1
Counts to flux (obs)2.95 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.69 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
44.64 (55)
Spectrum exposure46 s

PC mode. Mean photon arrival: T0+15260 s

NH (Galactic)8.84 × 1020 cm-2
NH (intrinsic)2.0 (+1.1, -1.0) × 1022 cm-2
z of absorber3.93
Photon index1.92 (+0.08, -0.08)
Flux (0.3-10 keV)
(Observed)
9.6 (+0.5, -0.5) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.19 (+0.05, -0.05) × 10-11 erg cm-2 s-1
Counts to flux (obs)3.50 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.35 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
451.95 (460)
Spectrum exposure13.1 ks

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Late Time spectrum (T0 + 4000 to 40522 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+16083 s

NH (Galactic)8.84 × 1020 cm-2
NH (intrinsic)2.2 (+1.1, -1.1) × 1022 cm-2
z of absorber3.93
Photon index1.95 (+0.09, -0.08)
Flux (0.3-10 keV)
(Observed)
8.7 (+0.5, -0.5) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.10 (+0.05, -0.05) × 10-11 erg cm-2 s-1
Counts to flux (obs)3.43 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.33 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
411.11 (440)
Spectrum exposure12.4 ks

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