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Swift-XRT spectra of GRB 220921A

Last updated after receiving ObsID 00021519001, version 6

Data were analysed using HEASOFT version 6.35.2

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Time-averaged spectrum (T0 + 33429 to 44472 s)

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PC mode spectrum of Time-averaged

PC mode. Mean photon arrival: T0+37421 s

NH (Galactic)2.60 × 1020 cm-2
NH (intrinsic)1.7 (+1.9, -1.4) × 1021 cm-2
z of absorber0
Photon index2.2 (+0.6, -0.5)
Flux (0.3-10 keV)
(Observed)		3.23 (+1.12, -0.76) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)		4.73 (+1.17, -0.86) × 10-12 erg cm-2 s-1
Counts to flux (obs)2.86 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.18 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?		71.10 (83)
Spectrum exposure1.6 ks