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Swift-XRT spectra of GRB 151228B

Last updated after receiving ObsID 00668641008, version 6

Data were analysed using HEASOFT version 6.29

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Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 55 to 29005 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+106 s

NH (Galactic)5.75 × 1020 cm-2
NH (intrinsic)1.27 (+0.20, -0.19) × 1021 cm-2
z of absorber0
Photon index2.44 (+0.08, -0.07)
Flux (0.3-10 keV)
(Observed)
1.25 (+0.04, -0.04) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.08 (+0.07, -0.07) × 10-9 erg cm-2 s-1
Counts to flux (obs)2.78 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.62 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
486.48 (503)
Spectrum exposure194 s

PC mode. Mean photon arrival: T0+7570 s

NH (Galactic)5.75 × 1020 cm-2
NH (intrinsic)0 (+2.20 × 1020, -0) cm-2
z of absorber0
Photon index1.896 (+0.186, -0.090)
Flux (0.3-10 keV)
(Observed)
2.30 (+0.25, -0.27) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.49 (+0.25, -0.26) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.40 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.68 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
188.35 (214)
Spectrum exposure10.0 ks

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Late Time spectrum (T0 + 4686 to 29005 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+12496 s

NH (Galactic)5.75 × 1020 cm-2
NH (intrinsic)8 (+75, -8) × 1019 cm-2
z of absorber0
Photon index1.90 (+0.30, -0.19)
Flux (0.3-10 keV)
(Observed)
1.32 (+0.20, -0.21) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.50 (+0.22, -0.18) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.47 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.96 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
110.43 (156)
Spectrum exposure8.9 ks

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