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Swift-XRT spectra of GRB 100728B

Last updated after receiving ObsID 00430172005, version 8

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 2.106 (GCN 11317)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 100 to 23343 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+135 s

N_H (Galactic)	7.93 × 10²⁰ cm^-2
N_H (intrinsic)	9.7 (+12.2, -9.3) × 10²¹ cm^-2
z of absorber	2.106
Photon index	1.81 (+0.26, -0.24)
Flux (0.3-10 keV) (Observed)	1.81 (+0.34, -0.29) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.21 (+0.31, -0.28) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	3.50 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.27 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	165.51 (206)
Spectrum exposure	84 s

PC mode. Mean photon arrival: T0+8087 s

N_H (Galactic)	7.93 × 10²⁰ cm^-2
N_H (intrinsic)	5 (+7, -5) × 10²¹ cm^-2
z of absorber	2.106
Photon index	1.94 (+0.18, -0.17)
Flux (0.3-10 keV) (Observed)	2.46 (+0.30, -0.27) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.02 (+0.29, -0.27) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.45 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.23 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	206.53 (237)
Spectrum exposure	9.1 ks

Late Time spectrum (T0 + 4002 to 23343 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+9731 s

N_H (Galactic)	7.93 × 10²⁰ cm^-2
N_H (intrinsic)	6 (+8, -6) × 10²¹ cm^-2
z of absorber	2.106
Photon index	2.05 (+0.22, -0.21)
Flux (0.3-10 keV) (Observed)	1.83 (+0.26, -0.22) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.36 (+0.27, -0.25) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.27 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.22 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	161.96 (196)
Spectrum exposure	8.5 ks