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Swift-XRT spectra of GRB 181020A

Last updated after receiving ObsID 00867987004, version 6

Data were analysed using HEASOFT version 6.32

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The spectral fits assume a redshift: 2.938 (GCN 23356)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 61 to 24046 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+360 s

N_H (Galactic)	1.64 × 10²⁰ cm^-2
N_H (intrinsic)	1.178 (+0.101, -0.099) × 10²² cm^-2
z of absorber	2.938
Photon index	1.837 (+0.017, -0.017)
Flux (0.3-10 keV) (Observed)	1.962 (+0.023, -0.023) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.203 (+0.021, -0.021) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.48 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.91 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	848.96 (828)
Spectrum exposure	993 s

PC mode. Mean photon arrival: T0+14657 s

N_H (Galactic)	1.64 × 10²⁰ cm^-2
N_H (intrinsic)	7 (+3, -3) × 10²¹ cm^-2
z of absorber	2.938
Photon index	1.95 (+0.07, -0.07)
Flux (0.3-10 keV) (Observed)	2.72 (+0.13, -0.12) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.03 (+0.12, -0.11) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	3.29 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.66 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	440.18 (473)
Spectrum exposure	8.5 ks

Late Time spectrum (T0 + 4823 to 24046 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+14657 s

N_H (Galactic)	1.64 × 10²⁰ cm^-2
N_H (intrinsic)	7 (+3, -3) × 10²¹ cm^-2
z of absorber	2.938
Photon index	1.95 (+0.07, -0.07)
Flux (0.3-10 keV) (Observed)	2.72 (+0.13, -0.12) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.03 (+0.12, -0.11) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	3.29 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.66 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	440.18 (473)
Spectrum exposure	8.5 ks