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Swift-XRT spectra of GRB 171222A

Last updated after receiving ObsID 00799669013, version 8

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 2.409 (GCN 22272)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 176 to 42070 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+276 s

N_H (Galactic)	1.07 × 10²⁰ cm^-2
N_H (intrinsic)	7.3 (+1.1, -1.0) × 10²¹ cm^-2
z of absorber	2.409
Photon index	2.14 (+0.03, -0.03)
Flux (0.3-10 keV) (Observed)	1.83 (+0.04, -0.04) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.13 (+0.04, -0.04) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	2.96 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.45 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	682.96 (680)
Spectrum exposure	386 s

PC mode. Mean photon arrival: T0+7579 s

N_H (Galactic)	1.07 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+4.53 × 10²¹, -0) cm^-2
z of absorber	2.409
Photon index	1.92 (+0.19, -0.10)
Flux (0.3-10 keV) (Observed)	2.72 (+0.25, -0.31) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.79 (+0.28, -0.27) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.29 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.38 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	176.10 (205)
Spectrum exposure	8.3 ks

Late Time spectrum (T0 + 5288 to 42070 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+22895 s

N_H (Galactic)	1.07 × 10²⁰ cm^-2
N_H (intrinsic)	2.1 (+1.7, -1.4) × 10²² cm^-2
z of absorber	2.409
Photon index	2.3 (+0.4, -0.4)
Flux (0.3-10 keV) (Observed)	7.3 (+1.9, -1.4) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.05 (+0.31, -0.20) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	2.88 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.13 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	82.34 (85)
Spectrum exposure	6.9 ks