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Swift-XRT spectra of GRB 250911A

Last updated after receiving ObsID 01348587001, version 15

Data were analysed using HEASOFT version 6.35.2

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Add time-sliced spectrum.

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 3448 to 48381 s)

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PC mode spectrum of Time-averaged

PC mode. Mean photon arrival: T0+13381 s

N_H (Galactic)	3.44 × 10²¹ cm^-2
N_H (intrinsic)	7 (+10, -7) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.85 (+0.16, -0.16)
Flux (0.3-10 keV) (Observed)	1.22 (+0.11, -0.10) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.76 (+0.16, -0.13) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.38 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.33 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	313.45 (389)
Spectrum exposure	7.5 ks

Late Time spectrum (T0 + 4000 to 48381 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+15628 s

N_H (Galactic)	3.44 × 10²¹ cm^-2
N_H (intrinsic)	3.6 (+10.4, -3.6) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.83 (+0.18, -0.15)
Flux (0.3-10 keV) (Observed)	9.3 (+0.9, -0.9) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.315 (+0.132, -0.085) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.36 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.17 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	290.57 (350)
Spectrum exposure	6.9 ks