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Swift-XRT spectra of GRB 121217A

Last updated after receiving ObsID 00542441024, version 6.

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Time-averaged spectrum (T0 + 70 to 59251 s)

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WT and PC mode spectra of GRB 121217A

WT mode. Mean photon arrival: T0+95 s

NH (Galactic)5.15 × 1021 cm-2
NH (intrinsic)0 (+2.30 × 1020, -0) cm-2
z of absorber0
Photon index2.031 (+0.113, -0.073)
Flux (0.3-10 keV)
(Observed)
5.1 (+0.4, -0.3) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
8.354 (+0.018, -1.033) × 10-10 erg cm-2 s-1
Counts to flux (obs)3.82 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)6.23 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
309.32 (410)
Spectrum exposure78 s

PC mode. Mean photon arrival: T0+18183 s

NH (Galactic)5.15 × 1021 cm-2
NH (intrinsic)8 (+7, -6) × 1020 cm-2
z of absorber0
Photon index1.88 (+0.09, -0.09)
Flux (0.3-10 keV)
(Observed)
1.28 (+0.06, -0.06) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.00 (+0.12, -0.10) × 10-11 erg cm-2 s-1
Counts to flux (obs)4.51 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)7.04 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
505.60 (568)
Spectrum exposure13.5 ks

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Late Time spectrum (T0 + 5507 to 59251 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+22941 s

NH (Galactic)5.15 × 1021 cm-2
NH (intrinsic)1.1 (+0.8, -0.7) × 1021 cm-2
z of absorber0
Photon index1.97 (+0.11, -0.11)
Flux (0.3-10 keV)
(Observed)
8.9 (+0.5, -0.5) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.477 (+0.109, -0.091) × 10-11 erg cm-2 s-1
Counts to flux (obs)4.31 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)7.16 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
444.43 (514)
Spectrum exposure12.8 ks

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