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Swift-XRT spectra of GRB 221009A

Last updated after receiving ObsID 01126853084, version 21

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 0.151 (GCN 32648)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 3373 to 101193 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+26300 s

N_H (Galactic)	5.38 × 10²¹ cm^-2
N_H (intrinsic)	1.265 (+0.023, -0.022) × 10²² cm^-2
z of absorber	0.151
Photon index	1.750 (+0.011, -0.011)
Flux (0.3-10 keV) (Observed)	2.424 (+0.011, -0.011) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.078 (+0.030, -0.029) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	5.89 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	9.90 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	1572.99 (966)
Spectrum exposure	12.5 ks

PC mode. Mean photon arrival: T0+94453 s

N_H (Galactic)	5.38 × 10²¹ cm^-2
N_H (intrinsic)	1.4 (+0.4, -0.4) × 10²² cm^-2
z of absorber	0.151
Photon index	1.77 (+0.20, -0.19)
Flux (0.3-10 keV) (Observed)	2.28 (+0.19, -0.18) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.0 (+0.6, -0.4) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	6.16 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.07 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	332.45 (458)
Spectrum exposure	3.1 ks

Late Time spectrum (T0 + 67669 to 101193 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+94428 s

N_H (Galactic)	5.38 × 10²¹ cm^-2
N_H (intrinsic)	1.4 (+0.4, -0.4) × 10²² cm^-2
z of absorber	0.151
Photon index	1.77 (+0.20, -0.19)
Flux (0.3-10 keV) (Observed)	2.28 (+0.19, -0.18) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.0 (+0.6, -0.4) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	6.15 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.07 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	333.19 (458)
Spectrum exposure	3.1 ks