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Swift-XRT spectra of GRB 120729A

Last updated after receiving ObsID 00529095005, version 20

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 0.8 (GCN 13532)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 74 to 86054 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+138 s

N_H (Galactic)	2.15 × 10²¹ cm^-2
N_H (intrinsic)	0 (+1.10 × 10²¹, -0) cm^-2
z of absorber	0.8
Photon index	1.36 (+0.09, -0.04)
Flux (0.3-10 keV) (Observed)	7.0 (+0.3, -0.4) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	8.0 (+0.3, -0.4) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	5.09 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.80 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	500.39 (577)
Spectrum exposure	170 s

PC mode. Mean photon arrival: T0+5579 s

N_H (Galactic)	2.15 × 10²¹ cm^-2
N_H (intrinsic)	2.6 (+2.1, -1.9) × 10²¹ cm^-2
z of absorber	0.8
Photon index	1.80 (+0.13, -0.12)
Flux (0.3-10 keV) (Observed)	2.18 (+0.18, -0.17) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.90 (+0.19, -0.18) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.11 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.47 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	385.65 (402)
Spectrum exposure	36.9 ks

Late Time spectrum (T0 + 4001 to 86054 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+8581 s

N_H (Galactic)	2.15 × 10²¹ cm^-2
N_H (intrinsic)	2.1 (+2.6, -2.1) × 10²¹ cm^-2
z of absorber	0.8
Photon index	1.84 (+0.16, -0.16)
Flux (0.3-10 keV) (Observed)	1.026 (+0.111, -0.100) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.38 (+0.12, -0.11) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.00 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.36 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	267.37 (320)
Spectrum exposure	36.5 ks