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Swift-XRT spectra of GRB 090417B

Last updated after receiving ObsID 00349450017, version 15

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 0.345 (GCN 9156)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 393 to 29599 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+1260 s

N_H (Galactic)	1.69 × 10²⁰ cm^-2
N_H (intrinsic)	4.44 (+0.14, -0.14) × 10²² cm^-2
z of absorber	0.345
Photon index	1.67 (+0.03, -0.03)
Flux (0.3-10 keV) (Observed)	1.894 (+0.026, -0.026) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.24 (+0.07, -0.07) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	6.89 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.18 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	884.05 (903)
Spectrum exposure	1.5 ks

PC mode. Mean photon arrival: T0+10872 s

N_H (Galactic)	1.69 × 10²⁰ cm^-2
N_H (intrinsic)	3.3 (+0.3, -0.3) × 10²² cm^-2
z of absorber	0.345
Photon index	1.97 (+0.12, -0.12)
Flux (0.3-10 keV) (Observed)	3.58 (+0.18, -0.17) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	7.2 (+0.7, -0.6) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	5.59 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.12 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	553.18 (577)
Spectrum exposure	9.4 ks

Late Time spectrum (T0 + 5366 to 29599 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+11916 s

N_H (Galactic)	1.69 × 10²⁰ cm^-2
N_H (intrinsic)	3.3 (+0.4, -0.3) × 10²² cm^-2
z of absorber	0.345
Photon index	2.04 (+0.13, -0.12)
Flux (0.3-10 keV) (Observed)	2.96 (+0.16, -0.15) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	6.3 (+0.8, -0.6) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	5.39 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.15 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	508.77 (549)
Spectrum exposure	9.2 ks