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Swift-XRT spectra of GRB 060904B

Last updated after receiving ObsID 00228006008, version 19

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 0.7 (GCN 5513)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 76 to 40807 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+206 s

N_H (Galactic)	1.94 × 10²¹ cm^-2
N_H (intrinsic)	4.4 (+0.5, -0.5) × 10²¹ cm^-2
z of absorber	0.7
Photon index	2.12 (+0.04, -0.04)
Flux (0.3-10 keV) (Observed)	2.96 (+0.07, -0.07) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.72 (+0.12, -0.11) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.45 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.50 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	731.27 (686)
Spectrum exposure	225 s

PC mode. Mean photon arrival: T0+11200 s

N_H (Galactic)	1.94 × 10²¹ cm^-2
N_H (intrinsic)	2.8 (+1.8, -1.6) × 10²¹ cm^-2
z of absorber	0.7
Photon index	2.05 (+0.15, -0.14)
Flux (0.3-10 keV) (Observed)	2.43 (+0.22, -0.20) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.63 (+0.31, -0.27) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.53 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.26 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	298.04 (328)
Spectrum exposure	15.6 ks

Late Time spectrum (T0 + 4000 to 40807 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+11844 s

N_H (Galactic)	1.94 × 10²¹ cm^-2
N_H (intrinsic)	3.0 (+1.9, -1.7) × 10²¹ cm^-2
z of absorber	0.7
Photon index	2.09 (+0.15, -0.15)
Flux (0.3-10 keV) (Observed)	2.25 (+0.21, -0.19) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.43 (+0.32, -0.27) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.46 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.29 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	287.79 (313)
Spectrum exposure	15.3 ks