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Swift-XRT spectra of GRB 090531A

Last updated after receiving ObsID 00353627002, version 19

Data were analysed using HEASOFT version 6.32

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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

N_H (Galactic)	1.36 × 10²⁰ cm^-2
N_H (intrinsic)	6 (+45, -6) × 10²⁰ cm^-2
z of absorber	0
Photon index	0.8 (+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 exposure	16.0 ks