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Swift-XRT spectra of GRB 250920C

Last updated after receiving ObsID 01351039001, version 12

Data were analysed using HEASOFT version 6.35.2

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The spectral fits assume a redshift: 1.4 (GCN 41928)

Jump to: Time-averaged|Late Time


Time-averaged spectrum (T0 + 130 to 56200 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+159 s

NH (Galactic)1.40 × 1020 cm-2
NH (intrinsic)3.4 (+2.1, -2.0) × 1020 cm-2
z of absorber1.4
Photon index1.938 (+0.100, -0.096)
Flux (0.3-10 keV)
(Observed)
1.20 (+0.07, -0.07) × 10-9 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.34 (+0.06, -0.05) × 10-9 erg cm-2 s-1
Counts to flux (obs)3.26 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)3.64 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
419.19 (442)
Spectrum exposure64 s

PC mode. Mean photon arrival: T0+13921 s

NH (Galactic)1.40 × 1020 cm-2
NH (intrinsic)5 (+4, -3) × 1020 cm-2
z of absorber1.4
Photon index1.89 (+0.16, -0.15)
Flux (0.3-10 keV)
(Observed)
1.43 (+0.14, -0.13) × 10-11 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.63 (+0.13, -0.12) × 10-11 erg cm-2 s-1
Counts to flux (obs)3.55 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.05 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
262.80 (291)
Spectrum exposure4.1 ks

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Late Time spectrum (T0 + 7045 to 56200 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+20776 s

NH (Galactic)1.40 × 1020 cm-2
NH (intrinsic)6 (+5, -5) × 1020 cm-2
z of absorber1.4
Photon index1.95 (+0.21, -0.20)
Flux (0.3-10 keV)
(Observed)
7.7 (+1.0, -0.8) × 10-12 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
9.0 (+0.9, -0.8) × 10-12 erg cm-2 s-1
Counts to flux (obs)3.45 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)4.05 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?
200.88 (227)
Spectrum exposure3.9 ks

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