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Swift-XRT spectra of GRB 181228A

Last updated after receiving ObsID 00879909005, version 6

Data were analysed using HEASOFT version -1

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Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 88 to 29616 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+318 s

NH (Galactic)2.85 × 1021 cm-2
NH (intrinsic)1.19 (+0.28, -0.27) × 1021 cm-2
z of absorber0
Photon index1.66 (+0.05, -0.05)
Flux (0.3-10 keV)
(Observed)
1.20 (+0.03, -0.03) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.59 (+0.03, -0.03) × 10-9 erg cm-2 s-1
Counts to flux (obs)4.65 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)6.15 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
743.56 (763)
Spectrum exposure405 s

PC mode. Mean photon arrival: T0+2683 s

NH (Galactic)2.85 × 1021 cm-2
NH (intrinsic)2.4 (+1.4, -1.3) × 1021 cm-2
z of absorber0
Photon index1.81 (+0.20, -0.19)
Flux (0.3-10 keV)
(Observed)
3.7 (+0.4, -0.4) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.5 (+0.7, -0.5) × 10-11 erg cm-2 s-1
Counts to flux (obs)4.54 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)6.68 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
242.80 (330)
Spectrum exposure2.9 ks

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Late Time spectrum (T0 + 12874 to 29616 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+15598 s

NH (Galactic)2.85 × 1021 cm-2
NH (intrinsic)2.6 (+4.8, -2.6) × 1021 cm-2
z of absorber0
Photon index1.9 (+0.7, -0.6)
Flux (0.3-10 keV)
(Observed)
2.77 (+1.04, -0.74) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
4.2 (+2.3, -1.0) × 10-12 erg cm-2 s-1
Counts to flux (obs)4.26 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)6.55 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
58.69 (69)
Spectrum exposure2.0 ks

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