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Swift-XRT spectra of GRB 130427A

Last updated after receiving ObsID 00554620161, version 11.

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The spectral fits assume a redshift: 0.34 (GCN 14455)

Non-standard pipeline processing was used to produce these data. The pointing accuracy requirements for the first snapshot has been removed, and the UVOT-derived attitude file used.

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 143 to 23940 s)

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WT and PC mode spectra of GRB 130427A

WT mode. Mean photon arrival: T0+1133 s

NH (Galactic)1.91 × 1020 cm-2
NH (intrinsic)8.1 (+15.0, -8.1) × 1020 cm-2
z of absorber0.34
Photon index1.96 (+0.28, -0.25)
Flux (0.3-10 keV)
(Observed)
1.89 (+0.33, -0.28) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.13 (+0.25, -0.21) × 10-10 erg cm-2 s-1
Counts to flux (obs)1.2 × 10-12 erg cm-2 ct-1
Counts to flux (unabs)1.3 × 10-12 erg cm-2 ct-1
W-stat (dof)
What's this?
1048.37 (920)
Spectrum exposure1.8 ks

PC mode. Mean photon arrival: T0+23392 s

NH (Galactic)1.91 × 1020 cm-2
NH (intrinsic)1.2 (+0.8, -0.7) × 1021 cm-2
z of absorber0.34
Photon index1.68 (+0.16, -0.15)
Flux (0.3-10 keV)
(Observed)
2.22 (+0.24, -0.22) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.48 (+0.21, -0.19) × 10-10 erg cm-2 s-1
Counts to flux (obs)4 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
267.01 (290)
Spectrum exposure1.1 ks

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Late Time spectrum (T0 + 22844 to 23940 s)

Download spectral files for Late Time spectrum.

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PC mode spectrum of GRB 130427A

PC mode. Mean photon arrival: T0+23392 s

NH (Galactic)1.91 × 1020 cm-2
NH (intrinsic)1.2 (+0.8, -0.7) × 1021 cm-2
z of absorber0.34
Photon index1.68 (+0.16, -0.15)
Flux (0.3-10 keV)
(Observed)
2.22 (+0.24, -0.22) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.48 (+0.21, -0.19) × 10-10 erg cm-2 s-1
Counts to flux (obs)4 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)5 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
267.01 (290)
Spectrum exposure1.1 ks

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