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Swift-XRT spectra of GRB 221231A

Last updated after receiving ObsID 00021534002, version 8

Data were analysed using HEASOFT version 6.35.2

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Time-averaged spectrum (T0 + 32689 to 44302 s)

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PC mode spectrum of Time-averaged

PC mode. Mean photon arrival: T0+35935 s

NH (Galactic)6.44 × 1020 cm-2
NH (intrinsic)0 (+2.31 × 1021, -0) cm-2
z of absorber0
Photon index1.3 (+0.8, -0.3)
Flux (0.3-10 keV)
(Observed)		4.6 (+2.1, -1.9) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)		5.0 (+1.7, -1.8) × 10-13 erg cm-2 s-1
Counts to flux (obs)4.84 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.21 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?		23.24 (28)
Spectrum exposure5.0 ks