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Swift-XRT spectra of GRB 130418A

Last updated after receiving ObsID 00553847007, version 9

Data were analysed using HEASOFT version 6.32

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The spectral fits assume a redshift: 1.218 (GCN 14380)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 136 to 15644 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+232 s

NH (Galactic)2.93 × 1020 cm-2
NH (intrinsic)0 (+3.50 × 1020, -0) cm-2
z of absorber1.218
Photon index1.20 (+0.04, -0.04)
Flux (0.3-10 keV)
(Observed)
8.50 (+0.33, -0.26) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
8.68 (+0.39, -0.30) × 10-10 erg cm-2 s-1
Counts to flux (obs)5.12 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5.23 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
668.27 (634)
Spectrum exposure217 s

PC mode. Mean photon arrival: T0+7661 s

NH (Galactic)2.93 × 1020 cm-2
NH (intrinsic)1.9 (+2.9, -1.9) × 1021 cm-2
z of absorber1.218
Photon index1.58 (+0.18, -0.18)
Flux (0.3-10 keV)
(Observed)
1.15 (+0.16, -0.14) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.25 (+0.14, -0.13) × 10-11 erg cm-2 s-1
Counts to flux (obs)4.16 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.50 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
211.51 (241)
Spectrum exposure2.5 ks

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Late Time spectrum (T0 + 5389 to 15644 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+8912 s

NH (Galactic)2.93 × 1020 cm-2
NH (intrinsic)6 (+31, -6) × 1020 cm-2
z of absorber1.218
Photon index1.56 (+0.21, -0.16)
Flux (0.3-10 keV)
(Observed)
9.6 (+1.5, -1.3) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.01 (+0.14, -0.12) × 10-11 erg cm-2 s-1
Counts to flux (obs)4.18 × 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?
154.52 (198)
Spectrum exposure2.1 ks

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