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Swift-XRT spectra of GRB 120311B

Last updated after receiving ObsID 00517489000, version 14

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 3071 to 22958 s)

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PC mode spectrum of Time-averaged

WT mode. Mean photon arrival: T0+3077 s

Can't find a valid fit for this spectrum

PC mode. Mean photon arrival: T0+9803 s

N_H (Galactic)	2.97 × 10²¹ cm^-2
N_H (intrinsic)	2.2 (+1.4, -1.2) × 10²¹ cm^-2
z of absorber	0
Photon index	1.90 (+0.21, -0.20)
Flux (0.3-10 keV) (Observed)	2.9 (+0.4, -0.3) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.5 (+0.6, -0.5) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.29 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.62 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	243.07 (297)
Spectrum exposure	10.2 ks

Late Time spectrum (T0 + 4000 to 22958 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+11119 s

N_H (Galactic)	2.97 × 10²¹ cm^-2
N_H (intrinsic)	2.1 (+1.5, -1.3) × 10²¹ cm^-2
z of absorber	0
Photon index	1.81 (+0.23, -0.22)
Flux (0.3-10 keV) (Observed)	2.8 (+0.4, -0.3) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.09 (+0.57, -0.22) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.53 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.61 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	212.37 (273)
Spectrum exposure	9.3 ks