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Swift-XRT spectra of GRB 171222A

Last updated after receiving ObsID 00799669013, version 8

Data were analysed using HEASOFT version 6.32

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The spectral fits assume a redshift: 2.409 (GCN 22272)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 176 to 42070 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+276 s

NH (Galactic)1.07 × 1020 cm-2
NH (intrinsic)7.3 (+1.1, -1.0) × 1021 cm-2
z of absorber2.409
Photon index2.14 (+0.03, -0.03)
Flux (0.3-10 keV)
(Observed)
1.83 (+0.04, -0.04) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.13 (+0.04, -0.04) × 10-9 erg cm-2 s-1
Counts to flux (obs)2.96 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.45 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
682.96 (680)
Spectrum exposure386 s

PC mode. Mean photon arrival: T0+7579 s

NH (Galactic)1.07 × 1020 cm-2
NH (intrinsic)0 (+4.53 × 1021, -0) cm-2
z of absorber2.409
Photon index1.92 (+0.19, -0.10)
Flux (0.3-10 keV)
(Observed)
2.72 (+0.25, -0.31) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.79 (+0.28, -0.27) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.29 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.38 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
176.10 (205)
Spectrum exposure8.3 ks

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Late Time spectrum (T0 + 5288 to 42070 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+22895 s

NH (Galactic)1.07 × 1020 cm-2
NH (intrinsic)2.1 (+1.7, -1.4) × 1022 cm-2
z of absorber2.409
Photon index2.3 (+0.4, -0.4)
Flux (0.3-10 keV)
(Observed)
7.3 (+1.9, -1.4) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.05 (+0.31, -0.20) × 10-12 erg cm-2 s-1
Counts to flux (obs)2.88 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.13 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
82.34 (85)
Spectrum exposure6.9 ks

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