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Swift-XRT spectra of GRB 090904A

Last updated after receiving ObsID 00361830007, version 9

Data were analysed using HEASOFT version 6.32

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 135 to 29563 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+328 s

N_H (Galactic)	1.31 × 10²¹ cm^-2
N_H (intrinsic)	5.6 (+1.9, -1.8) × 10²⁰ cm^-2
z of absorber	0
Photon index	2.01 (+0.06, -0.06)
Flux (0.3-10 keV) (Observed)	1.34 (+0.04, -0.04) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.82 (+0.05, -0.05) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.42 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.64 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	605.14 (609)
Spectrum exposure	180 s

PC mode. Mean photon arrival: T0+4981 s

N_H (Galactic)	1.31 × 10²¹ cm^-2
N_H (intrinsic)	4 (+6, -4) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.56 (+0.15, -0.14)
Flux (0.3-10 keV) (Observed)	8.7 (+0.9, -0.8) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.01 (+0.08, -0.07) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.56 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.30 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	295.43 (363)
Spectrum exposure	11.8 ks

Late Time spectrum (T0 + 4863 to 29563 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+14294 s

N_H (Galactic)	1.31 × 10²¹ cm^-2
N_H (intrinsic)	6 (+10, -6) × 10²⁰ cm^-2
z of absorber	0
Photon index	2.12 (+0.30, -0.28)
Flux (0.3-10 keV) (Observed)	1.09 (+0.19, -0.16) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.56 (+0.22, -0.20) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.30 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.72 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	148.74 (168)
Spectrum exposure	11.0 ks