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Swift-XRT spectra of GRB 050822

Last updated after receiving ObsID 00151486022, version 20

Data were analysed using HEASOFT version 6.35.2

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Add time-sliced spectrum.

The spectral fits assume a redshift: 1.434 (Hjorth et al. 2012)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 111 to 41938 s)

Download spectral files for Time-averaged spectrum.

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+289 s

N_H (Galactic)	1.47 × 10²⁰ cm^-2
N_H (intrinsic)	8.9 (+0.9, -0.8) × 10²¹ cm^-2
z of absorber	1.434
Photon index	2.48 (+0.06, -0.06)
Flux (0.3-10 keV) (Observed)	7.81 (+0.22, -0.21) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.20 (+0.04, -0.04) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	2.67 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.10 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	493.10 (558)
Spectrum exposure	441 s

PC mode. Mean photon arrival: T0+18166 s

N_H (Galactic)	1.47 × 10²⁰ cm^-2
N_H (intrinsic)	4.1 (+1.7, -1.6) × 10²¹ cm^-2
z of absorber	1.434
Photon index	1.97 (+0.11, -0.11)
Flux (0.3-10 keV) (Observed)	3.94 (+0.28, -0.26) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.58 (+0.27, -0.26) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.27 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.81 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	329.69 (368)
Spectrum exposure	14.6 ks

Late Time spectrum (T0 + 6133 to 41938 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+21896 s

N_H (Galactic)	1.47 × 10²⁰ cm^-2
N_H (intrinsic)	7.6 (+2.4, -2.2) × 10²¹ cm^-2
z of absorber	1.434
Photon index	1.94 (+0.12, -0.12)
Flux (0.3-10 keV) (Observed)	3.19 (+0.26, -0.23) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.92 (+0.25, -0.24) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.41 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.19 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	304.03 (353)
Spectrum exposure	13.7 ks