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Swift-XRT spectra of GRB 081109

Last updated after receiving ObsID 00334112007, version 13

Data were analysed using HEASOFT version 6.32

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The spectral fits assume a redshift: 0.9787 (Kruhler et al. 2011, A&A 534, A108)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 71 to 82310 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+144 s

N_H (Galactic)	1.66 × 10²⁰ cm^-2
N_H (intrinsic)	8.6 (+1.4, -1.3) × 10²¹ cm^-2
z of absorber	0.9787
Photon index	1.56 (+0.07, -0.06)
Flux (0.3-10 keV) (Observed)	8.1 (+0.4, -0.3) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	9.5 (+0.3, -0.3) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	4.49 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.27 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	537.33 (623)
Spectrum exposure	246 s

PC mode. Mean photon arrival: T0+13925 s

N_H (Galactic)	1.66 × 10²⁰ cm^-2
N_H (intrinsic)	1.43 (+0.26, -0.23) × 10²² cm^-2
z of absorber	0.9787
Photon index	1.89 (+0.11, -0.10)
Flux (0.3-10 keV) (Observed)	4.27 (+0.28, -0.26) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	6.0 (+0.3, -0.3) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.93 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.48 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	399.53 (446)
Spectrum exposure	27.1 ks

Late Time spectrum (T0 + 4761 to 82310 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+19779 s

N_H (Galactic)	1.66 × 10²⁰ cm^-2
N_H (intrinsic)	1.48 (+0.32, -0.28) × 10²² cm^-2
z of absorber	0.9787
Photon index	2.00 (+0.13, -0.13)
Flux (0.3-10 keV) (Observed)	2.17 (+0.17, -0.16) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.21 (+0.25, -0.21) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.71 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.48 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	368.42 (383)
Spectrum exposure	26.2 ks