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Swift-XRT spectra of GRB 090510

Last updated after receiving ObsID 00351588001, version 19.

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The spectral fits assume a redshift: 0.903 (GCN 9353)

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Time-averaged spectrum (T0 + 97 to 92256 s)

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WT and PC mode spectra of GRB 090510

WT mode. Mean photon arrival: T0+179 s

N_H (Galactic)	1.7 × 10²⁰ cm^-2
N_H (intrinsic)	1.48 (+0.95, -0.82) × 10²¹ cm^-2
z of absorber	0.903
Photon index	1.73 (+0.14, -0.13)
Flux (0.3-10 keV) (Observed)	1.98 (+0.20, -0.18) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.22 (+0.16, -0.19) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	3.7 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.1 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	319.80 (335)
Exposure time	172 s

PC mode. Mean photon arrival: T0+2559 s

N_H (Galactic)	1.7 × 10²⁰ cm^-2
N_H (intrinsic)	4.4 (+7.9, -4.4) × 10²⁰ cm^-2
z of absorber	0.903
Photon index	1.75 (+0.12, -0.12)
Flux (0.3-10 keV) (Observed)	3.40 (+0.29, -0.26) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.64 (+0.26, -0.20) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.0 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.3 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	325.68 (362)
Exposure time	31.0 ks

Late Time spectrum (T0 + 5234 to 92256 s)

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PC mode spectrum of GRB 090510

PC mode. Mean photon arrival: T0+11419 s

N_H (Galactic)	1.7 × 10²⁰ cm^-2
N_H (intrinsic)	2.1 (+2.7, -2.1) × 10²¹ cm^-2
z of absorber	0.903
Photon index	2.12 (+0.39, -0.35)
Flux (0.3-10 keV) (Observed)	2.54 (+0.61, -0.48) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.14 (+0.68, -0.45) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	3.3 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.1 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	95.94 (123)
Exposure time	29.3 ks