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Swift-XRT spectra of GRB 090531A

Last updated after receiving ObsID 00353627002, version 19

Data were analysed using HEASOFT version 6.35.2

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Time-averaged spectrum (T0 + 860951 to 942456 s)

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PC mode spectrum of Time-averaged

PC mode. Mean photon arrival: T0+897034 s

NH (Galactic)1.36 × 1020 cm-2
NH (intrinsic)6 (+45, -6) × 1020 cm-2
z of absorber0
Photon index0.8 (+0.8, -0.6)
Flux (0.3-10 keV)
(Observed)		2.4 (+1.6, -1.0) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)		2.50 (+1.02, -0.77) × 10-13 erg cm-2 s-1
Counts to flux (obs)7.63 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)7.81 × 10-11 erg cm-2 ct-1
W-stat (dof)
What's this?		27.40 (30)
Spectrum exposure16.0 ks