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Swift-XRT spectra of GRB 150811A

Last updated after receiving ObsID 00651882008, version 2

Data were analysed using HEASOFT version 6.35.2

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 147 to 50359 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+204 s

N_H (Galactic)	1.54 × 10²¹ cm^-2
N_H (intrinsic)	0 (+5.58 × 10²⁰, -0) cm^-2
z of absorber	0
Photon index	2.04 (+0.19, -0.10)
Flux (0.3-10 keV) (Observed)	2.37 (+0.19, -0.23) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.16 (+0.21, -0.26) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	3.26 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.35 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	228.90 (310)
Spectrum exposure	156 s

PC mode. Mean photon arrival: T0+9077 s

N_H (Galactic)	1.54 × 10²¹ cm^-2
N_H (intrinsic)	8 (+9, -8) × 10²⁰ cm^-2
z of absorber	0
Photon index	2.08 (+0.24, -0.22)
Flux (0.3-10 keV) (Observed)	1.86 (+0.25, -0.22) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.72 (+0.28, -0.31) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.44 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.01 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	179.85 (242)
Spectrum exposure	11.7 ks

Late Time spectrum (T0 + 4218 to 50359 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+11714 s

N_H (Galactic)	1.54 × 10²¹ cm^-2
N_H (intrinsic)	6 (+10, -6) × 10²⁰ cm^-2
z of absorber	0
Photon index	2.07 (+0.27, -0.25)
Flux (0.3-10 keV) (Observed)	1.19 (+0.19, -0.16) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.70 (+0.22, -0.21) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.42 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.87 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	155.48 (207)
Spectrum exposure	11.5 ks