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Swift-XRT spectra of GRB 090417B

Last updated after receiving ObsID 00349450017, version 15

Data were analysed using HEASOFT version 6.32

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The spectral fits assume a redshift: 0.345 (GCN 9156)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 393 to 29599 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+1260 s

NH (Galactic)1.69 × 1020 cm-2
NH (intrinsic)4.44 (+0.14, -0.14) × 1022 cm-2
z of absorber0.345
Photon index1.67 (+0.03, -0.03)
Flux (0.3-10 keV)
(Observed)
1.894 (+0.026, -0.026) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
3.24 (+0.07, -0.07) × 10-9 erg cm-2 s-1
Counts to flux (obs)6.89 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)1.18 × 10-10 erg cm-2 ct-1
W-stat (dof)
What's this?
884.05 (903)
Spectrum exposure1.5 ks

PC mode. Mean photon arrival: T0+10872 s

NH (Galactic)1.69 × 1020 cm-2
NH (intrinsic)3.3 (+0.3, -0.3) × 1022 cm-2
z of absorber0.345
Photon index1.97 (+0.12, -0.12)
Flux (0.3-10 keV)
(Observed)
3.58 (+0.18, -0.17) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
7.2 (+0.7, -0.6) × 10-11 erg cm-2 s-1
Counts to flux (obs)5.59 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)1.12 × 10-10 erg cm-2 ct-1
W-stat (dof)
What's this?
553.18 (577)
Spectrum exposure9.4 ks

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Late Time spectrum (T0 + 5366 to 29599 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+11916 s

NH (Galactic)1.69 × 1020 cm-2
NH (intrinsic)3.3 (+0.4, -0.3) × 1022 cm-2
z of absorber0.345
Photon index2.04 (+0.13, -0.12)
Flux (0.3-10 keV)
(Observed)
2.96 (+0.16, -0.15) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
6.3 (+0.8, -0.6) × 10-11 erg cm-2 s-1
Counts to flux (obs)5.39 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)1.15 × 10-10 erg cm-2 ct-1
W-stat (dof)
What's this?
508.77 (549)
Spectrum exposure9.2 ks

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