Swift/XRT spectra of GRB 090518

Last updated using ObsID 00352420002, version 11

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Time-averaged spectrum (T0 + 77 to 41948 s)

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WT and PC mode spectra of GRB 090518

WT mode. Mean photon arrival: T0+81 s

N_H (Galactic)	4.7e+20 cm^-2
N_H (intrinsic)	5.3 (+6.9, -4.2) x 10²¹ cm^-2
z of absorber	0
Photon index	2.10 (+1.30, -0.90)
Flux (0.3-10 keV) (Observed)	2.19 (+1.00, -2.19) x 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.3 x 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	4.3 x 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	8.4 x 10^-11 erg cm^-2 ct^-1
C-stat (dof)	29.25 (39)
Exposure time	9 s

PC mode. Mean photon arrival: T0+8240 s

N_H (Galactic)	4.7e+20 cm^-2
N_H (intrinsic)	5.79 (+0.77, -0.84) x 10²¹ cm^-2
z of absorber	0
Photon index	2.53 (+0.15, -0.19)
Flux (0.3-10 keV) (Observed)	1.97 (+0.24, -0.52) x 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.8 x 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.3 x 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.3 x 10^-10 erg cm^-2 ct^-1
C-stat (dof)	316.41 (326)
Exposure time	19.1 ks

Late Time spectrum (T0 + 4658 to 41929 s)

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PC mode spectrum of GRB 090518

PC mode. Mean photon arrival: T0+15529 s

N_H (Galactic)	4.7e+20 cm^-2
N_H (intrinsic)	5.30 (+0.80, -1.05) x 10²¹ cm^-2
z of absorber	0
Photon index	2.58 (+0.22, -0.26)
Flux (0.3-10 keV) (Observed)	1.03 (+0.19, -0.38) x 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.1 x 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.0 x 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.2 x 10^-10 erg cm^-2 ct^-1
C-stat (dof)	216.50 (220)
Exposure time	17.7 ks