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Swift-XRT spectra of GRB 130408A

Last updated after receiving ObsID 00553132009, version 7

Data were analysed using HEASOFT version 6.22

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The spectral fits assume a redshift: 3.758 (GCN 14365)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 153 to 63642 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+157 s

NH (Galactic)3.20 × 1021 cm-2
NH (intrinsic)0 (+2.61 × 1023, -0) cm-2
z of absorber3.758
Photon index2.01 (+1.04, -0.51)
Flux (0.3-10 keV)
(Observed)
1.3 (+0.6, -0.5) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.94 (+1.81, -0.82) × 10-10 erg cm-2 s-1
Counts to flux (obs)3.35 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.10 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
14.43 (27)
Spectrum exposure9 s

PC mode. Mean photon arrival: T0+11068 s

NH (Galactic)3.20 × 1021 cm-2
NH (intrinsic)0 (+5.46 × 1021, -0) cm-2
z of absorber3.758
Photon index2.003 (+0.106, -0.051)
Flux (0.3-10 keV)
(Observed)
3.57 (+0.18, -0.21) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.05 (+0.13, -0.46) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.75 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.30 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
386.82 (417)
Spectrum exposure19.4 ks

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Late Time spectrum (T0 + 4001 to 63642 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+15404 s

NH (Galactic)3.20 × 1021 cm-2
NH (intrinsic)0 (+8.67 × 1021, -0) cm-2
z of absorber3.758
Photon index2.193 (+0.100, -0.089)
Flux (0.3-10 keV)
(Observed)
2.05 (+0.15, -0.12) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
3.22 (+0.09, -0.41) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.38 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.31 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
279.52 (348)
Spectrum exposure18.8 ks

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