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Swift-XRT spectra of GRB 090516

Last updated after receiving ObsID 00352190009, version 16.

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The spectral fits assume a redshift: 4.109 (GCN 9383)

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Time-averaged spectrum (T0 + 170 to 127519 s)

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WT and PC mode spectra of GRB 090516

WT mode. Mean photon arrival: T0+258 s

N_H (Galactic)	4.5 × 10²⁰ cm^-2
N_H (intrinsic)	3.29 (+0.27, -0.26) × 10²² cm^-2
z of absorber	4.109
Photon index	1.921 (+0.029, -0.029)
Flux (0.3-10 keV) (Observed)	3.504 (+0.067, -0.066) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.48 (+0.33, +0.16) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.6 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.6 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	795.07 (727)
Exposure time	319 s

PC mode. Mean photon arrival: T0+20819 s

N_H (Galactic)	4.5 × 10²⁰ cm^-2
N_H (intrinsic)	1.37 (+0.52, -0.50) × 10²² cm^-2
z of absorber	4.109
Photon index	2.087 (+0.072, -0.070)
Flux (0.3-10 keV) (Observed)	2.255 (+0.099, -0.094) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.84 (+0.10, -0.13) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.4 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.3 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	429.35 (487)
Exposure time	54.5 ks

Late Time spectrum (T0 + 4000 to 127519 s)

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PC mode spectrum of GRB 090516

PC mode. Mean photon arrival: T0+21980 s

N_H (Galactic)	4.5 × 10²⁰ cm^-2
N_H (intrinsic)	1.59 (+0.55, -0.53) × 10²² cm^-2
z of absorber	4.109
Photon index	2.114 (+0.074, -0.072)
Flux (0.3-10 keV) (Observed)	2.050 (+0.092, -0.088) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.628 (+0.099, -0.122) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.4 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.3 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	411.83 (479)
Exposure time	54.4 ks