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Swift-XRT spectra of GRB 180818A

Last updated after receiving ObsID 00853824002, version 5

Data were analysed using HEASOFT version 6.32

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 80 to 29447 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+90 s

N_H (Galactic)	1.14 × 10²¹ cm^-2
N_H (intrinsic)	9.0 (+3.0, -2.3) × 10²¹ cm^-2
z of absorber	0
Photon index	3.5 (+0.6, -0.5)
Flux (0.3-10 keV) (Observed)	2.6 (+0.4, -0.4) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.6 (+3.0, -0.5) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	2.48 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	2.44 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	111.17 (152)
Spectrum exposure	27 s

PC mode. Mean photon arrival: T0+5764 s

N_H (Galactic)	1.14 × 10²¹ cm^-2
N_H (intrinsic)	8.9 (+3.2, -2.6) × 10²¹ cm^-2
z of absorber	0
Photon index	3.0 (+0.5, -0.4)
Flux (0.3-10 keV) (Observed)	8.2 (+1.4, -1.2) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.3 (+4.3, -1.3) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.03 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.61 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	118.86 (160)
Spectrum exposure	11.3 ks

Late Time spectrum (T0 + 5059 to 29447 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+12219 s

N_H (Galactic)	1.14 × 10²¹ cm^-2
N_H (intrinsic)	6 (+4, -3) × 10²¹ cm^-2
z of absorber	0
Photon index	2.9 (+0.7, -0.6)
Flux (0.3-10 keV) (Observed)	3.99 (+1.14, -0.84) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.52 (+2.25, -0.41) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	2.92 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.12 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	59.53 (87)
Spectrum exposure	9.8 ks