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Swift-XRT spectra of GRB 190821A

Last updated after receiving ObsID 00921722001, version 9

Data were analysed using HEASOFT version 6.32

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 84 to 33891 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+93 s

N_H (Galactic)	3.35 × 10²¹ cm^-2
N_H (intrinsic)	1.6 (+1.2, -1.1) × 10²¹ cm^-2
z of absorber	0
Photon index	3.1 (+0.4, -0.3)
Flux (0.3-10 keV) (Observed)	3.8 (+0.5, -0.4) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.5 (+0.7, -0.4) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	2.44 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	9.47 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	170.36 (210)
Spectrum exposure	32 s

PC mode. Mean photon arrival: T0+10067 s

N_H (Galactic)	3.35 × 10²¹ cm^-2
N_H (intrinsic)	5.4 (+11.1, -5.4) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.73 (+0.19, -0.17)
Flux (0.3-10 keV) (Observed)	6.7 (+0.7, -0.7) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	9.1 (+0.8, -0.8) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.53 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.15 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	304.91 (319)
Spectrum exposure	6.4 ks

Late Time spectrum (T0 + 5150 to 33891 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+13614 s

N_H (Galactic)	3.35 × 10²¹ cm^-2
N_H (intrinsic)	8.5 (+13.9, -8.5) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.71 (+0.22, -0.21)
Flux (0.3-10 keV) (Observed)	4.7 (+0.6, -0.5) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	6.4 (+0.7, -0.6) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.67 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.33 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	240.98 (273)
Spectrum exposure	6.1 ks