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Swift-XRT spectra of GRB 090904B

Last updated after receiving ObsID 00361831007, version 12

Data were analysed using HEASOFT version 6.32

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 137 to 52989 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+148 s

N_H (Galactic)	4.72 × 10²¹ cm^-2
N_H (intrinsic)	0 (+4.73 × 10²², -0) cm^-2
z of absorber	0
Photon index	0.51 (+1.69, -0.51)
Flux (0.3-10 keV) (Observed)	2.8 (+1.2, -1.0) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.99 (+1.40, -0.95) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	8.61 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	9.08 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	25.74 (46)
Spectrum exposure	19 s

PC mode. Mean photon arrival: T0+7229 s

N_H (Galactic)	4.72 × 10²¹ cm^-2
N_H (intrinsic)	1.5 (+0.5, -0.4) × 10²² cm^-2
z of absorber	0
Photon index	1.85 (+0.29, -0.27)
Flux (0.3-10 keV) (Observed)	1.01 (+0.11, -0.10) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.9 (+0.4, -0.3) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	6.50 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.25 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	282.11 (347)
Spectrum exposure	11.4 ks

Late Time spectrum (T0 + 28813 to 52989 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+38154 s

N_H (Galactic)	4.72 × 10²¹ cm^-2
N_H (intrinsic)	2.3 (+1.4, -1.1) × 10²² cm^-2
z of absorber	0
Photon index	2.6 (+0.8, -0.7)
Flux (0.3-10 keV) (Observed)	7.1 (+2.1, -1.5) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.3 (+4.5, -1.4) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	5.21 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	2.44 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	89.10 (94)
Spectrum exposure	10.2 ks