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Swift-XRT spectra of GRB 211221A

Last updated after receiving ObsID 01090472001, version 9

Data were analysed using HEASOFT version 6.29

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Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 60 to 73663 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+83 s

NH (Galactic)1.37 × 1021 cm-2
NH (intrinsic)9 (+4, -3) × 1021 cm-2
z of absorber0
Photon index1.9 (+0.4, -0.3)
Flux (0.3-10 keV)
(Observed)
4.5 (+0.9, -0.7) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
7.8 (+2.6, -1.4) × 10-10 erg cm-2 s-1
Counts to flux (obs)4.72 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)8.29 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
184.54 (206)
Spectrum exposure52 s

PC mode. Mean photon arrival: T0+6164 s

NH (Galactic)1.37 × 1021 cm-2
NH (intrinsic)9 (+4, -3) × 1021 cm-2
z of absorber0
Photon index1.59 (+0.31, -0.29)
Flux (0.3-10 keV)
(Observed)
1.29 (+0.21, -0.18) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.88 (+0.35, -0.24) × 10-11 erg cm-2 s-1
Counts to flux (obs)6.18 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)9.04 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
164.38 (222)
Spectrum exposure5.8 ks

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Late Time spectrum (T0 + 21374 to 73663 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+39549 s

NH (Galactic)1.37 × 1021 cm-2
NH (intrinsic)8 (+9, -6) × 1021 cm-2
z of absorber0
Photon index2.44 (+1.13, -0.88)
Flux (0.3-10 keV)
(Observed)
4.6 (+2.4, -1.5) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.2 (+4.1, -0.5) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.79 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)1.03 × 10-10 erg cm-2 ct-1
W-stat (dof)
What's this?
37.77 (38)
Spectrum exposure4.9 ks

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