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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+1206 s

NH (Galactic)1.91 × 1020 cm-2
NH (intrinsic)3.1 (+0.8, -0.8) × 1020 cm-2
z of absorber0.34
Photon index1.532 (+0.015, -0.015)
Flux (0.3-10 keV)
(Observed)
7.92 (+0.08, -0.08) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
8.28 (+0.06, -0.08) × 10-9 erg cm-2 s-1
Counts to flux (obs)4.20 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.40 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
1357.92 (881)
Spectrum exposure1.9 ks

PC mode. Mean photon arrival: T0+23394 s

NH (Galactic)1.91 × 1020 cm-2
NH (intrinsic)1.3 (+0.8, -0.7) × 1021 cm-2
z of absorber0.34
Photon index1.69 (+0.15, -0.15)
Flux (0.3-10 keV)
(Observed)
2.22 (+0.24, -0.21) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.49 (+0.21, -0.18) × 10-10 erg cm-2 s-1
Counts to flux (obs)4.01 × 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?
270.10 (293)
Spectrum exposure1.1 ks

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Late Time spectrum (T0 + 22758 to 23940 s)

Download spectral files for Late Time spectrum.

Plots to download

WT and PC mode spectra of GRB 130427A

WT mode. Mean photon arrival: T0+22798 s

PC mode. Mean photon arrival: T0+23394 s

NH (Galactic)1.91 × 1020 cm-2
NH (intrinsic)1.3 (+0.8, -0.7) × 1021 cm-2
z of absorber0.34
Photon index1.69 (+0.15, -0.15)
Flux (0.3-10 keV)
(Observed)
2.22 (+0.24, -0.21) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.49 (+0.21, -0.18) × 10-10 erg cm-2 s-1
Counts to flux (obs)4.01 × 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?
270.10 (293)
Spectrum exposure1.1 ks

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