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Swift-XRT spectra of GRB 250904A

Last updated after receiving ObsID 01347179002, version 8

Data were analysed using HEASOFT version 6.35.2

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 86 to 44860 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+89 s

N_H (Galactic)	3.34 × 10²¹ cm^-2
N_H (intrinsic)	0 (+1.29 × 10²², -0) cm^-2
z of absorber	0
Photon index	1.31 (+1.69, -0.85)
Flux (0.3-10 keV) (Observed)	2.1 (+1.7, -1.3) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.2 (+3.8, -1.3) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	4.56 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.92 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	11.47 (13)
Spectrum exposure	7 s

PC mode. Mean photon arrival: T0+4348 s

N_H (Galactic)	3.34 × 10²¹ cm^-2
N_H (intrinsic)	1.0 (+1.4, -1.0) × 10²¹ cm^-2
z of absorber	0
Photon index	2.05 (+0.27, -0.25)
Flux (0.3-10 keV) (Observed)	3.3 (+0.5, -0.4) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.46 (+1.05, -0.64) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.97 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.47 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	182.96 (221)
Spectrum exposure	6.3 ks

Late Time spectrum (T0 + 4781 to 44860 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+7846 s

N_H (Galactic)	3.34 × 10²¹ cm^-2
N_H (intrinsic)	1.6 (+2.2, -1.6) × 10²¹ cm^-2
z of absorber	0
Photon index	2.1 (+0.4, -0.4)
Flux (0.3-10 keV) (Observed)	1.8 (+0.4, -0.3) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.07 (+1.07, -0.56) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.98 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.97 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	98.97 (146)
Spectrum exposure	6.0 ks