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Swift-XRT spectra of GRB 180404A

Last updated after receiving ObsID 00821881009, version 18

Data were analysed using HEASOFT version 6.32

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The spectral fits assume a redshift: 1 (GCN 22591)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 90 to 5176 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+101 s

NH (Galactic)3.07 × 1020 cm-2
NH (intrinsic)0 (+2.33 × 1021, -0) cm-2
z of absorber1
Photon index2.7 (+0.5, -0.3)
Flux (0.3-10 keV)
(Observed)
1.54 (+0.34, -0.28) × 10-10 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.8 (+0.4, -0.3) × 10-10 erg cm-2 s-1
Counts to flux (obs)2.40 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)2.84 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
57.64 (72)
Spectrum exposure26 s

PC mode. Mean photon arrival: T0+1257 s

NH (Galactic)3.07 × 1020 cm-2
NH (intrinsic)0 (+1.77 × 1021, -0) cm-2
z of absorber1
Photon index1.76 (+0.28, -0.23)
Flux (0.3-10 keV)
(Observed)
7.0 (+1.5, -1.4) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
7.5 (+1.6, -1.3) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.69 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.93 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
48.89 (86)
Spectrum exposure925 s

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Late Time spectrum (T0 + 4898 to 5176 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+5035 s

NH (Galactic)3.07 × 1020 cm-2
NH (intrinsic)0 (+8.37 × 1021, -0) cm-2
z of absorber1
Photon index1.65 (+1.06, -0.47)
Flux (0.3-10 keV)
(Observed)
3.4 (+1.9, -1.6) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
3.6 (+1.9, -1.5) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.86 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.08 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
27.79 (16)
Spectrum exposure278 s

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