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Swift-XRT spectra of GRB 150818A

Last updated after receiving ObsID 00652603019, version 10

Data were analysed using HEASOFT version 6.29

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 88 to 44867 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+103 s

N_H (Galactic)	2.47 × 10²⁰ cm^-2
N_H (intrinsic)	2.33 (+0.30, -0.29) × 10²¹ cm^-2
z of absorber	0
Photon index	2.512 (+0.103, -0.098)
Flux (0.3-10 keV) (Observed)	8.8 (+0.4, -0.4) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.68 (+0.08, -0.07) × 10^-8 erg cm^-2 s^-1
Counts to flux (obs)	2.76 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.26 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	435.19 (464)
Spectrum exposure	34 s

PC mode. Mean photon arrival: T0+10350 s

N_H (Galactic)	2.47 × 10²⁰ cm^-2
N_H (intrinsic)	6 (+8, -6) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.95 (+0.29, -0.27)
Flux (0.3-10 keV) (Observed)	1.49 (+0.27, -0.22) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.77 (+0.24, -0.21) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.37 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.01 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	143.03 (167)
Spectrum exposure	7.7 ks

Late Time spectrum (T0 + 4000 to 44867 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+11037 s

N_H (Galactic)	2.47 × 10²⁰ cm^-2
N_H (intrinsic)	5 (+8, -5) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.97 (+0.31, -0.28)
Flux (0.3-10 keV) (Observed)	1.43 (+0.26, -0.22) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.69 (+0.24, -0.21) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.32 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.92 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	119.34 (157)
Spectrum exposure	7.1 ks