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Swift-XRT spectra of GRB 250920B

Last updated after receiving ObsID 01351008001, version 3

Data were analysed using HEASOFT version 6.35.2

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 96 to 22256 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+195 s

N_H (Galactic)	1.12 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+6.41 × 10¹⁹, -0) cm^-2
z of absorber	0
Photon index	1.490 (+0.035, -0.017)
Flux (0.3-10 keV) (Observed)	2.21 (+0.04, -0.05) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.25 (+0.03, -0.04) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	4.18 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.25 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	702.22 (766)
Spectrum exposure	355 s

PC mode. Mean photon arrival: T0+9900 s

N_H (Galactic)	1.12 × 10²⁰ cm^-2
N_H (intrinsic)	2.1 (+1.5, -1.4) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.89 (+0.07, -0.07)
Flux (0.3-10 keV) (Observed)	5.24 (+0.23, -0.22) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.64 (+0.18, -0.19) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	3.46 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.73 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	469.50 (479)
Spectrum exposure	6.0 ks

Late Time spectrum (T0 + 4001 to 22256 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+10392 s

N_H (Galactic)	1.12 × 10²⁰ cm^-2
N_H (intrinsic)	2.3 (+1.6, -1.5) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.89 (+0.07, -0.07)
Flux (0.3-10 keV) (Observed)	4.96 (+0.23, -0.22) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.35 (+0.18, -0.19) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	3.48 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.75 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	446.89 (468)
Spectrum exposure	5.8 ks