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Swift-XRT spectra of GRB 170813A

Last updated after receiving ObsID 00767563001, version 17

Data were analysed using HEASOFT version 6.35.2

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 140 to 86962 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+150 s

N_H (Galactic)	2.73 × 10²⁰ cm^-2
N_H (intrinsic)	1.1 (+2.4, -1.1) × 10²¹ cm^-2
z of absorber	0
Photon index	1.4 (+0.5, -0.4)
Flux (0.3-10 keV) (Observed)	3.0 (+1.0, -0.8) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.4 (+0.8, -0.7) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	4.28 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.74 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	97.79 (102)
Spectrum exposure	26 s

PC mode. Mean photon arrival: T0+3847 s

N_H (Galactic)	2.73 × 10²⁰ cm^-2
N_H (intrinsic)	1.7 (+1.8, -1.4) × 10²¹ cm^-2
z of absorber	0
Photon index	1.7 (+0.4, -0.4)
Flux (0.3-10 keV) (Observed)	8.1 (+2.3, -1.8) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	10.0 (+2.0, -1.7) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	4.16 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.11 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	108.88 (122)
Spectrum exposure	21.2 ks

Late Time spectrum (T0 + 4313 to 86962 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+16821 s

N_H (Galactic)	2.73 × 10²⁰ cm^-2
N_H (intrinsic)	3 (+59, -3) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.84 (+1.65, -0.61)
Flux (0.3-10 keV) (Observed)	7 (+4, -3) × 10^-14 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	7.4 (+4.2, -2.7) × 10^-14 erg cm^-2 s^-1
Counts to flux (obs)	3.44 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.84 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	17.36 (28)
Spectrum exposure	20.3 ks