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Swift-XRT spectra of GRB 090426

Last updated after receiving ObsID 00350479007, version 12

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 2.609 (GCN 9264)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 88 to 25404 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+90 s

N_H (Galactic)	1.58 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+2.56 × 10²², -0) cm^-2
z of absorber	2.609
Photon index	1.6 (+0.9, -0.9)
Flux (0.3-10 keV) (Observed)	1.41 (+2.68, -0.70) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.52 (+2.57, -0.77) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	4.05 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.37 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	5.83 (8)
Spectrum exposure	7 s

PC mode. Mean photon arrival: T0+2229 s

N_H (Galactic)	1.58 × 10²⁰ cm^-2
N_H (intrinsic)	6 (+6, -6) × 10²¹ cm^-2
z of absorber	2.609
Photon index	1.95 (+0.16, -0.15)
Flux (0.3-10 keV) (Observed)	4.4 (+0.5, -0.4) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.9 (+0.4, -0.4) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.30 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.66 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	213.28 (264)
Spectrum exposure	6.8 ks

Late Time spectrum (T0 + 5463 to 25404 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+9056 s

N_H (Galactic)	1.58 × 10²⁰ cm^-2
N_H (intrinsic)	4.5 (+15.6, -4.5) × 10²¹ cm^-2
z of absorber	2.609
Photon index	1.82 (+0.36, -0.29)
Flux (0.3-10 keV) (Observed)	1.18 (+0.31, -0.25) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.27 (+0.27, -0.23) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.54 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.82 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	78.07 (87)
Spectrum exposure	4.6 ks