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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 (+2.21 × 1020, -0) cm-2
z of absorber0
Photon index2.027 (+0.115, -0.075)
Flux (0.3-10 keV)
(Observed)
5.1 (+0.5, -0.3) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
8.08 (+0.22, -0.78) × 10-10 erg cm-2 s-1
Counts to flux (obs)3.84 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)6.03 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
309.68 (410)
Spectrum exposure78 s

PC mode. Mean photon arrival: T0+18210 s

NH (Galactic)5.15 × 1021 cm-2
NH (intrinsic)7 (+7, -6) × 1020 cm-2
z of absorber0
Photon index1.87 (+0.10, -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)
1.975 (+0.113, -0.098) × 10-11 erg cm-2 s-1
Counts to flux (obs)4.55 × 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?
513.37 (567)
Spectrum exposure13.5 ks

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Late Time spectrum (T0 + 5507 to 59251 s)

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PC mode spectrum of GRB 121217A

PC mode. Mean photon arrival: T0+22936 s

NH (Galactic)5.15 × 1021 cm-2
NH (intrinsic)9 (+8, -7) × 1020 cm-2
z of absorber0
Photon index1.95 (+0.11, -0.11)
Flux (0.3-10 keV)
(Observed)
9.0 (+0.5, -0.5) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.476 (+0.106, -0.088) × 10-11 erg cm-2 s-1
Counts to flux (obs)4.34 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)7.11 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
445.14 (514)
Spectrum exposure12.8 ks

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