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Swift-XRT spectra of GRB 130427A

Last updated after receiving ObsID 00554620161, version 11

Data were analysed using HEASOFT version 6.22

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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 59810 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+1213 s

NH (Galactic)1.91 × 1020 cm-2
NH (intrinsic)3.0 (+0.8, -0.8) × 1020 cm-2
z of absorber0.34
Photon index1.532 (+0.016, -0.016)
Flux (0.3-10 keV)
(Observed)
7.62 (+0.08, -0.08) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
7.97 (+0.06, -0.06) × 10-9 erg cm-2 s-1
Counts to flux (obs)4.20 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.39 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
1320.07 (880)
Spectrum exposure1.9 ks

PC mode. Mean photon arrival: T0+44803 s

NH (Galactic)1.91 × 1020 cm-2
NH (intrinsic)1.1 (+0.4, -0.4) × 1021 cm-2
z of absorber0.34
Photon index1.70 (+0.08, -0.08)
Flux (0.3-10 keV)
(Observed)
7.3 (+0.4, -0.4) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
8.18 (+0.35, -0.29) × 10-11 erg cm-2 s-1
Counts to flux (obs)3.96 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.43 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
457.82 (515)
Spectrum exposure4.1 ks

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Late Time spectrum (T0 + 22844 to 59810 s)

Download spectral files for Late Time spectrum.

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+44803 s

NH (Galactic)1.91 × 1020 cm-2
NH (intrinsic)1.1 (+0.4, -0.4) × 1021 cm-2
z of absorber0.34
Photon index1.70 (+0.08, -0.08)
Flux (0.3-10 keV)
(Observed)
7.3 (+0.4, -0.4) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
8.18 (+0.35, -0.29) × 10-11 erg cm-2 s-1
Counts to flux (obs)3.96 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.43 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
457.82 (515)
Spectrum exposure4.1 ks

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