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Swift-XRT spectra of GRB 090518

Last updated after receiving ObsID 00352420002, version 13

Data were analysed using HEASOFT version 6.35.2

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Jump to: Time-averaged|Late Time

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

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+81 s

N_H (Galactic)	5.37 × 10²⁰ cm^-2
N_H (intrinsic)	1.04 (+1.52, -0.79) × 10²² cm^-2
z of absorber	0
Photon index	2.7 (+2.0, -1.2)
Flux (0.3-10 keV) (Observed)	1.62 (+1.41, -0.70) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	6.3 (+107.3, -3.7) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	3.01 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.16 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	28.99 (37)
Spectrum exposure	9 s

PC mode. Mean photon arrival: T0+8971 s

N_H (Galactic)	5.37 × 10²⁰ cm^-2
N_H (intrinsic)	9.5 (+1.8, -1.6) × 10²¹ cm^-2
z of absorber	0
Photon index	2.45 (+0.23, -0.21)
Flux (0.3-10 keV) (Observed)	2.07 (+0.21, -0.18) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.76 (+1.57, -0.62) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.84 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.07 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	283.86 (317)
Spectrum exposure	19.1 ks

Late Time spectrum (T0 + 4658 to 41948 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+15467 s

N_H (Galactic)	5.37 × 10²⁰ cm^-2
N_H (intrinsic)	7.6 (+2.0, -1.8) × 10²¹ cm^-2
z of absorber	0
Photon index	2.36 (+0.29, -0.27)
Flux (0.3-10 keV) (Observed)	1.11 (+0.15, -0.13) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.7 (+0.9, -0.4) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.74 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	9.02 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	186.84 (232)
Spectrum exposure	17.7 ks