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Swift-XRT spectra of GRB 100728A

Last updated after receiving ObsID 00430151006, version 20

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 1.567 (GCN 14500)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 80 to 29623 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+422 s

N_H (Galactic)	1.65 × 10²¹ cm^-2
N_H (intrinsic)	3.17 (+0.14, -0.14) × 10²² cm^-2
z of absorber	1.567
Photon index	1.770 (+0.020, -0.020)
Flux (0.3-10 keV) (Observed)	3.41 (+0.04, -0.04) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.83 (+0.05, -0.05) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	4.47 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.33 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	1000.13 (892)
Spectrum exposure	1.3 ks

PC mode. Mean photon arrival: T0+12343 s

N_H (Galactic)	1.65 × 10²¹ cm^-2
N_H (intrinsic)	2.6 (+0.4, -0.4) × 10²² cm^-2
z of absorber	1.567
Photon index	1.74 (+0.07, -0.07)
Flux (0.3-10 keV) (Observed)	3.62 (+0.15, -0.14) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.96 (+0.17, -0.16) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.55 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.23 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	540.22 (616)
Spectrum exposure	12.1 ks

Late Time spectrum (T0 + 4980 to 29623 s)

Download spectral files for Late Time spectrum.

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+14554 s

N_H (Galactic)	1.65 × 10²¹ cm^-2
N_H (intrinsic)	2.5 (+0.4, -0.4) × 10²² cm^-2
z of absorber	1.567
Photon index	1.75 (+0.07, -0.07)
Flux (0.3-10 keV) (Observed)	2.72 (+0.12, -0.11) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.72 (+0.14, -0.13) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.50 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.17 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	528.52 (604)
Spectrum exposure	11.7 ks