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Swift-XRT spectra of GRB 160821B

Last updated after receiving ObsID 00709357010, version 4

Data were analysed using HEASOFT version 6.32

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 72 to 47180 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+145 s

N_H (Galactic)	5.75 × 10²⁰ cm^-2
N_H (intrinsic)	3.4 (+2.0, -1.9) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.99 (+0.08, -0.08)
Flux (0.3-10 keV) (Observed)	6.03 (+0.27, -0.26) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	7.30 (+0.27, -0.27) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	3.27 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.96 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	523.58 (483)
Spectrum exposure	198 s

PC mode. Mean photon arrival: T0+9074 s

N_H (Galactic)	5.75 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+4.46 × 10²⁰, -0) cm^-2
z of absorber	0
Photon index	2.20 (+0.28, -0.24)
Flux (0.3-10 keV) (Observed)	5.53 (+1.16, -0.95) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	6.6 (+1.1, -1.7) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	2.97 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.54 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	81.07 (99)
Spectrum exposure	11.6 ks

Late Time spectrum (T0 + 4873 to 47180 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+17959 s

N_H (Galactic)	5.75 × 10²⁰ cm^-2
N_H (intrinsic)	1.6 (+3.3, -1.6) × 10²¹ cm^-2
z of absorber	0
Photon index	2.1 (+0.7, -0.6)
Flux (0.3-10 keV) (Observed)	2.54 (+1.08, -0.72) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.64 (+1.31, -0.92) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	3.44 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.93 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	50.61 (60)
Spectrum exposure	11.4 ks