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Swift-XRT spectra of GRB 220427A

Last updated after receiving ObsID 01104343002, version 9

Data were analysed using HEASOFT version 6.29

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Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 181 to 68771 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+201 s

NH (Galactic)1.02 × 1021 cm-2
NH (intrinsic)0 (+1.30 × 1021, -0) cm-2
z of absorber0
Photon index1.74 (+0.48, -0.19)
Flux (0.3-10 keV)
(Observed)
1.4 (+0.3, -0.3) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.6 (+0.4, -0.3) × 10-10 erg cm-2 s-1
Counts to flux (obs)3.46 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.87 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
82.59 (104)
Spectrum exposure37 s

PC mode. Mean photon arrival: T0+4003 s

NH (Galactic)1.02 × 1021 cm-2
NH (intrinsic)6 (+5, -4) × 1020 cm-2
z of absorber0
Photon index2.02 (+0.15, -0.15)
Flux (0.3-10 keV)
(Observed)
5.7 (+0.5, -0.5) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
7.6 (+0.5, -0.5) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.41 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.54 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
283.58 (326)
Spectrum exposure10.6 ks

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Late Time spectrum (T0 + 6112 to 68771 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+15881 s

NH (Galactic)1.02 × 1021 cm-2
NH (intrinsic)1.5 (+1.3, -1.1) × 1021 cm-2
z of absorber0
Photon index2.4 (+0.4, -0.4)
Flux (0.3-10 keV)
(Observed)
1.09 (+0.22, -0.17) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.9 (+0.7, -0.3) × 10-12 erg cm-2 s-1
Counts to flux (obs)2.97 × 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?
101.25 (138)
Spectrum exposure8.9 ks

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