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Swift-XRT spectra of GRB 060604

Last updated after receiving ObsID 00213486014, version 27.

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The spectral fits assume a redshift: 2.68 (GCN 5218)

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Time-averaged spectrum (T0 + 116 to 86231 s)

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WT and PC mode spectra of GRB 060604

WT mode. Mean photon arrival: T0+160 s

N_H (Galactic)	4.1 × 10²⁰ cm^-2
N_H (intrinsic)	1.80 (+0.19, -0.18) × 10²² cm^-2
z of absorber	2.68
Photon index	2.141 (+0.050, -0.049)
Flux (0.3-10 keV) (Observed)	1.487 (+0.045, -0.043) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.109 (+0.066, -0.052) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.2 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.5 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	515.84 (583)
Exposure time	148 s

PC mode. Mean photon arrival: T0+24784 s

N_H (Galactic)	4.1 × 10²⁰ cm^-2
N_H (intrinsic)	9.8 (+4.1, -3.8) × 10²¹ cm^-2
z of absorber	2.68
Photon index	2.17 (+0.13, -0.12)
Flux (0.3-10 keV) (Observed)	1.317 (+0.098, -0.090) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.761 (+0.031, -0.169) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.4 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.6 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	325.11 (339)
Exposure time	36.1 ks

Late Time spectrum (T0 + 4000 to 86231 s)

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PC mode spectrum of GRB 060604

PC mode. Mean photon arrival: T0+26115 s

N_H (Galactic)	4.1 × 10²⁰ cm^-2
N_H (intrinsic)	1.04 (+0.44, -0.40) × 10²² cm^-2
z of absorber	2.68
Photon index	2.15 (+0.13, -0.12)
Flux (0.3-10 keV) (Observed)	1.259 (+0.098, -0.090) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.68 (+0.11, -0.19) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.5 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.6 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	308.81 (332)
Exposure time	35.6 ks