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Swift-XRT spectra of GRB 090404

Last updated after receiving ObsID 00348428018, version 16

Data were analysed using HEASOFT version 6.35.2

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The spectral fits assume a redshift: 3 (Perley et al. 2013)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 91 to 88036 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+127 s

NH (Galactic)2.20 × 1020 cm-2
NH (intrinsic)10.0 (+0.7, -0.6) × 1022 cm-2
z of absorber3
Photon index2.58 (+0.06, -0.06)
Flux (0.3-10 keV)
(Observed)
3.16 (+0.09, -0.09) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
6.9 (+0.3, -0.3) × 10-9 erg cm-2 s-1
Counts to flux (obs)2.78 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)6.07 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
551.44 (529)
Spectrum exposure129 s

PC mode. Mean photon arrival: T0+20691 s

NH (Galactic)2.20 × 1020 cm-2
NH (intrinsic)1.22 (+0.18, -0.16) × 1023 cm-2
z of absorber3
Photon index2.24 (+0.11, -0.11)
Flux (0.3-10 keV)
(Observed)
3.20 (+0.19, -0.18) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.8 (+0.5, -0.4) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.38 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)6.10 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
388.38 (425)
Spectrum exposure25.5 ks

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Late Time spectrum (T0 + 4503 to 88036 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+23869 s

NH (Galactic)2.20 × 1020 cm-2
NH (intrinsic)1.24 (+0.19, -0.17) × 1023 cm-2
z of absorber3
Photon index2.23 (+0.12, -0.11)
Flux (0.3-10 keV)
(Observed)
2.81 (+0.18, -0.17) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5.0 (+0.4, -0.4) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.41 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)6.13 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
358.86 (405)
Spectrum exposure24.4 ks

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