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Swift-XRT spectra of GRB 111228A

Last updated after receiving ObsID 00510649033, version 16

Data were analysed using HEASOFT version 6.29

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The spectral fits assume a redshift: 0.714 (GCN 12759)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 148 to 81694 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+206 s

NH (Galactic)3.26 × 1020 cm-2
NH (intrinsic)5.8 (+0.4, -0.3) × 1021 cm-2
z of absorber0.714
Photon index3.62 (+0.07, -0.07)
Flux (0.3-10 keV)
(Observed)
1.239 (+0.024, -0.024) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
4.39 (+0.33, -0.29) × 10-9 erg cm-2 s-1
Counts to flux (obs)2.13 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)7.56 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
430.22 (414)
Spectrum exposure211 s

PC mode. Mean photon arrival: T0+20527 s

NH (Galactic)3.26 × 1020 cm-2
NH (intrinsic)3.5 (+0.7, -0.7) × 1021 cm-2
z of absorber0.714
Photon index1.94 (+0.07, -0.07)
Flux (0.3-10 keV)
(Observed)
9.2 (+0.4, -0.4) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.16 (+0.04, -0.04) × 10-11 erg cm-2 s-1
Counts to flux (obs)3.48 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.40 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
451.63 (503)
Spectrum exposure17.9 ks

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Late Time spectrum (T0 + 4397 to 81694 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+24031 s

NH (Galactic)3.26 × 1020 cm-2
NH (intrinsic)3.9 (+0.8, -0.7) × 1021 cm-2
z of absorber0.714
Photon index1.96 (+0.08, -0.08)
Flux (0.3-10 keV)
(Observed)
7.4 (+0.4, -0.4) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
9.5 (+0.4, -0.4) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.48 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.46 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
431.40 (485)
Spectrum exposure17.0 ks

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