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Swift-XRT spectra of GRB 080319B

Last updated after receiving ObsID 00306757031, version 18

Data were analysed using HEASOFT version 6.35.2

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Add time-sliced spectrum.

The spectral fits assume a redshift: 0.94 (GCN 7444)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 64 to 30643 s)

Download spectral files for Time-averaged spectrum.

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+815 s

N_H (Galactic)	1.15 × 10²⁰ cm^-2
N_H (intrinsic)	1.42 (+0.10, -0.10) × 10²¹ cm^-2
z of absorber	0.94
Photon index	1.698 (+0.011, -0.011)
Flux (0.3-10 keV) (Observed)	4.14 (+0.03, -0.03) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.454 (+0.028, -0.028) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.77 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.05 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	1036.74 (904)
Spectrum exposure	1.7 ks

PC mode. Mean photon arrival: T0+13234 s

N_H (Galactic)	1.15 × 10²⁰ cm^-2
N_H (intrinsic)	1.2 (+0.5, -0.5) × 10²¹ cm^-2
z of absorber	0.94
Photon index	1.73 (+0.06, -0.06)
Flux (0.3-10 keV) (Observed)	3.76 (+0.15, -0.15) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.03 (+0.13, -0.13) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	3.75 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.02 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	481.89 (553)
Spectrum exposure	9.3 ks

Late Time spectrum (T0 + 4948 to 30643 s)

Download spectral files for Late Time spectrum.

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+13234 s

N_H (Galactic)	1.15 × 10²⁰ cm^-2
N_H (intrinsic)	1.2 (+0.5, -0.5) × 10²¹ cm^-2
z of absorber	0.94
Photon index	1.73 (+0.06, -0.06)
Flux (0.3-10 keV) (Observed)	3.76 (+0.15, -0.15) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.03 (+0.13, -0.13) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	3.75 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.02 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	481.89 (553)
Spectrum exposure	9.3 ks