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Swift-XRT spectra of GRB 090728

Last updated after receiving ObsID 00358574002, version 13

Data were analysed using HEASOFT version 6.32

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 116 to 116705 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+135 s

N_H (Galactic)	9.27 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+2.50 × 10²⁰, -0) cm^-2
z of absorber	0
Photon index	2.41 (+0.19, -0.16)
Flux (0.3-10 keV) (Observed)	1.73 (+0.22, -0.19) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.03 (+0.41, -0.17) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	2.66 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.11 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	122.54 (183)
Spectrum exposure	55 s

PC mode. Mean photon arrival: T0+3912 s

N_H (Galactic)	9.27 × 10²⁰ cm^-2
N_H (intrinsic)	2.7 (+4.9, -2.7) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.79 (+0.16, -0.15)
Flux (0.3-10 keV) (Observed)	1.84 (+0.19, -0.17) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.19 (+0.17, -0.16) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.79 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.50 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	260.44 (322)
Spectrum exposure	20.5 ks

Late Time spectrum (T0 + 4383 to 116705 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+9317 s

N_H (Galactic)	9.27 × 10²⁰ cm^-2
N_H (intrinsic)	9 (+10, -8) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.84 (+0.28, -0.26)
Flux (0.3-10 keV) (Observed)	6.8 (+1.2, -1.0) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	8.69 (+1.16, -0.91) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	3.80 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.86 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	142.16 (189)
Spectrum exposure	19.6 ks