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Swift-XRT spectra of GRB 130420B

Last updated after receiving ObsID 00553996002, version 5.

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Time-averaged spectrum (T0 + 58 to 39893 s)

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WT and PC mode spectra of GRB 130420B

WT mode. Mean photon arrival: T0+61 s

NH (Galactic)1.52 × 1020 cm-2
NH (intrinsic)1.5 (+7.1, -1.5) × 1021 cm-2
z of absorber0
Photon index1.9 (+2.0, -1.0)
Flux (0.3-10 keV)
(Observed)
4.3 (+4.4, -2.4) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.5 (+4.0, -2.4) × 10-10 erg cm-2 s-1
Counts to flux (obs)2.88 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.71 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
20.66 (20)
Spectrum exposure7 s

PC mode. Mean photon arrival: T0+8614 s

NH (Galactic)1.52 × 1020 cm-2
NH (intrinsic)5.6 (+10.2, -5.6) × 1020 cm-2
z of absorber0
Photon index1.8 (+0.4, -0.3)
Flux (0.3-10 keV)
(Observed)
1.07 (+0.27, -0.21) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.21 (+0.22, -0.19) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.63 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.10 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
78.11 (113)
Spectrum exposure6.3 ks

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Late Time spectrum (T0 + 4000 to 39893 s)

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PC mode spectrum of GRB 130420B

PC mode. Mean photon arrival: T0+8990 s

NH (Galactic)1.52 × 1020 cm-2
NH (intrinsic)5.5 (+10.6, -5.5) × 1020 cm-2
z of absorber0
Photon index1.8 (+0.4, -0.3)
Flux (0.3-10 keV)
(Observed)
1.01 (+0.27, -0.20) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.15 (+0.22, -0.19) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.54 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.02 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
77.92 (105)
Spectrum exposure6.1 ks

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