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Swift-XRT spectra of GRB 210820A

Last updated after receiving ObsID 01069551005, version 3

Data were analysed using HEASOFT version 6.32

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 131 to 18217 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+268 s

N_H (Galactic)	3.59 × 10²⁰ cm^-2
N_H (intrinsic)	8.0 (+1.1, -1.1) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.75 (+0.03, -0.03)
Flux (0.3-10 keV) (Observed)	1.75 (+0.04, -0.04) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.05 (+0.04, -0.04) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.79 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.44 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	647.32 (757)
Spectrum exposure	339 s

PC mode. Mean photon arrival: T0+2565 s

N_H (Galactic)	3.59 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+3.26 × 10²⁰, -0) cm^-2
z of absorber	0
Photon index	2.29 (+0.21, -0.13)
Flux (0.3-10 keV) (Observed)	3.11 (+0.29, -0.19) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.6 (+0.3, -0.5) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	2.84 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.24 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	162.63 (174)
Spectrum exposure	6.2 ks

Late Time spectrum (T0 + 5919 to 18217 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+8745 s

N_H (Galactic)	3.59 × 10²⁰ cm^-2
N_H (intrinsic)	4.0 (+14.0, -4.0) × 10²⁰ cm^-2
z of absorber	0
Photon index	2.0 (+0.6, -0.4)
Flux (0.3-10 keV) (Observed)	7.4 (+2.5, -1.9) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	8.8 (+2.2, -1.9) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	3.30 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.90 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	85.01 (62)
Spectrum exposure	4.8 ks