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Swift-XRT spectra of GRB 250917B — Source 4

Last updated at 2025-09-19 at 05:46:21 UTC

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Time-averaged spectrum (T0 + 141 to 144927 s)

Download spectral files for Time-averaged spectrum.

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PC mode spectrum of GRB 250917B

PC mode. Mean photon arrival: T0+65634 s

NH (Galactic)7.45 × 1021 cm-2
NH (intrinsic)1.8 (+5.2, -1.5) × 1023 cm-2
z of absorber0
Photon index9.8 (+46.4, -12.5)
Flux (0.3-10 keV)
(Observed)
2.2 (+10.3, -1.7) × 10-14 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
5 (+41, -5) × 10-10 erg cm-2 s-1
Counts to flux (obs)5.16 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)1.27 × 10-6 erg cm-2 ct-1
W-stat
What's this?(dof)
1.48 (3)
Spectrum exposure9.5 ks