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Swift-XRT spectra of GRB 121229A

Last updated after receiving ObsID 00544347003, version 9

Data were analysed using HEASOFT version 6.32

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The spectral fits assume a redshift: 2.707 (GCN 14120)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 152 to 75035 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+422 s

NH (Galactic)2.08 × 1021 cm-2
NH (intrinsic)9 (+4, -4) × 1021 cm-2
z of absorber2.707
Photon index2.05 (+0.05, -0.05)
Flux (0.3-10 keV)
(Observed)
7.74 (+0.23, -0.22) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.125 (+0.030, -0.028) × 10-9 erg cm-2 s-1
Counts to flux (obs)3.44 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.00 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
591.47 (624)
Spectrum exposure371 s

PC mode. Mean photon arrival: T0+15076 s

NH (Galactic)2.08 × 1021 cm-2
NH (intrinsic)0 (+9.10 × 1021, -0) cm-2
z of absorber2.707
Photon index2.19 (+0.21, -0.18)
Flux (0.3-10 keV)
(Observed)
1.03 (+0.14, -0.14) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.55 (+0.18, -0.17) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.17 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.78 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
138.52 (166)
Spectrum exposure14.6 ks

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Late Time spectrum (T0 + 4000 to 75035 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+34284 s

NH (Galactic)2.08 × 1021 cm-2
NH (intrinsic)0 (+3.09 × 1022, -0) cm-2
z of absorber2.707
Photon index1.99 (+0.41, -0.28)
Flux (0.3-10 keV)
(Observed)
3.6 (+0.8, -0.8) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
4.90 (+1.04, -0.78) × 10-13 erg cm-2 s-1
Counts to flux (obs)3.60 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.95 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
88.00 (84)
Spectrum exposure14.4 ks

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