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Swift-XRT spectra of GRB 150915A

Last updated after receiving ObsID 00655721003, version 4

Data were analysed using HEASOFT version 6.32

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The spectral fits assume a redshift: 1.968 (GCN 18318)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 134 to 50902 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+195 s

NH (Galactic)8.65 × 1020 cm-2
NH (intrinsic)8.8 (+1.7, -1.6) × 1020 cm-2
z of absorber1.968
Photon index1.80 (+0.05, -0.05)
Flux (0.3-10 keV)
(Observed)
1.56 (+0.04, -0.04) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.95 (+0.04, -0.04) × 10-9 erg cm-2 s-1
Counts to flux (obs)3.77 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.71 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
611.44 (672)
Spectrum exposure235 s

PC mode. Mean photon arrival: T0+3383 s

NH (Galactic)8.65 × 1020 cm-2
NH (intrinsic)5.0 (+15.6, -5.0) × 1020 cm-2
z of absorber1.968
Photon index2.3 (+0.6, -0.4)
Flux (0.3-10 keV)
(Observed)
1.4 (+0.4, -0.3) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
2.1 (+0.5, -0.4) × 10-12 erg cm-2 s-1
Counts to flux (obs)2.99 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.29 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
76.14 (95)
Spectrum exposure7.5 ks

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Late Time spectrum (T0 + 4094 to 50902 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+32238 s

NH (Galactic)8.65 × 1020 cm-2
NH (intrinsic)4.2 (+11.8, -4.2) × 1021 cm-2
z of absorber1.968
Photon index4.8 (+3.1, -2.9)
Flux (0.3-10 keV)
(Observed)
4.4 (+5.4, -2.5) × 10-14 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
9 (+1.00 × 1013, -5) × 10-13 erg cm-2 s-1
Counts to flux (obs)1.88 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.87 × 10-10 erg cm-2 ct-1
W-stat (dof)
What's this?
8.83 (9)
Spectrum exposure7.1 ks

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