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Swift-XRT spectra of GRB 130427B

Last updated after receiving ObsID 00554635007, version 2.

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Time-averaged spectrum (T0 + 83 to 121728 s)

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WT and PC mode spectra of GRB 130427B

WT mode. Mean photon arrival: T0+130 s

NH (Galactic)5.4 × 1020 cm-2
NH (intrinsic)9.8 (+288.9, -9.8) × 1018 cm-2
z of absorber0
Photon index1.803 (+0.121, -0.074)
Flux (0.3-10 keV)
(Observed)
4.72 (+0.28, -0.35) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.21 (+0.31, -0.29) × 10-10 erg cm-2 s-1
Counts to flux (obs)3 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
400.50 (412)
Spectrum exposure120 s

PC mode. Mean photon arrival: T0+7622 s

NH (Galactic)5.4 × 1020 cm-2
NH (intrinsic)1.3 (+5.8, -1.3) × 1020 cm-2
z of absorber0
Photon index1.72 (+0.21, -0.15)
Flux (0.3-10 keV)
(Observed)
2.6 (+0.3, -0.3) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.84 (+0.30, -0.25) × 10-12 erg cm-2 s-1
Counts to flux (obs)4 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
215.60 (234)
Spectrum exposure11.4 ks

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Late Time spectrum (T0 + 11565 to 121728 s)

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PC mode spectrum of GRB 130427B

PC mode. Mean photon arrival: T0+20266 s

NH (Galactic)5.4 × 1020 cm-2
NH (intrinsic)0 (+8 × 1020, -0) cm-2
z of absorber0
Photon index1.82 (+0.35, -0.18)
Flux (0.3-10 keV)
(Observed)
6.02 (+1.00, -1.12) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
6.7 (+1.1, -1.1) × 10-13 erg cm-2 s-1
Counts to flux (obs)4 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
109.41 (108)
Spectrum exposure10.2 ks

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