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Swift-XRT spectra of GRB 121229A

Last updated after receiving ObsID 00544347003, version 8.

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

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 0 to 75012 s)

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WT and PC mode spectra of GRB 121229A

WT mode. Mean photon arrival: T0+422 s

NH (Galactic)2.08 × 1021 cm-2
NH (intrinsic)8 (+4, -4) × 1021 cm-2
z of absorber2.707
Photon index2.05 (+0.05, -0.05)
Flux (0.3-10 keV)
(Observed)
7.41 (+0.22, -0.21) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.073 (+0.035, -0.027) × 10-9 erg cm-2 s-1
Counts to flux (obs)3.44 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.97 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
595.73 (621)
Spectrum exposure371 s

PC mode. Mean photon arrival: T0+14890 s

NH (Galactic)2.08 × 1021 cm-2
NH (intrinsic)0 (+8.42 × 1021, -0) cm-2
z of absorber2.707
Photon index2.20 (+0.21, -0.18)
Flux (0.3-10 keV)
(Observed)
8.8 (+1.1, -1.2) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.21 (+0.12, -0.19) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.16 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.37 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
134.50 (170)
Spectrum exposure14.6 ks

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Late Time spectrum (T0 + 4000 to 75012 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+34784 s

NH (Galactic)2.08 × 1021 cm-2
NH (intrinsic)0 (+3.01 × 1022, -0) cm-2
z of absorber2.707
Photon index1.98 (+0.40, -0.29)
Flux (0.3-10 keV)
(Observed)
3.2 (+0.8, -0.7) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
4.43 (+0.86, -1.05) × 10-13 erg cm-2 s-1
Counts to flux (obs)3.60 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.93 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
81.61 (86)
Spectrum exposure14.4 ks

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