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Swift-XRT spectra of GRB 130131A

Last updated after receiving ObsID 00547407005, version 9.

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Time-averaged spectrum (T0 + 64 to 121264 s)

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WT and PC mode spectra of GRB 130131A

WT mode. Mean photon arrival: T0+238 s

N_H (Galactic)	1.4 × 10²⁰ cm^-2
N_H (intrinsic)	3.03 (+0.19, -0.19) × 10²¹ cm^-2
z of absorber	0
Photon index	2.446 (+0.067, -0.066)
Flux (0.3-10 keV) (Observed)	9.82 (+0.30, -0.29) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.138 (+0.091, -0.101) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.2 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7.0 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	591.46 (608)
Exposure time	235 s

PC mode. Mean photon arrival: T0+5749 s

N_H (Galactic)	1.4 × 10²⁰ cm^-2
N_H (intrinsic)	2.56 (+0.67, -0.61) × 10²¹ cm^-2
z of absorber	0
Photon index	2.36 (+0.23, -0.22)
Flux (0.3-10 keV) (Observed)	1.53 (+0.16, -0.15) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.96 (+0.31, -0.37) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.4 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.6 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	265.85 (270)
Exposure time	16.9 ks

Late Time spectrum (T0 + 5324 to 121264 s)

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PC mode spectrum of GRB 130131A

PC mode. Mean photon arrival: T0+15982 s

N_H (Galactic)	1.4 × 10²⁰ cm^-2
N_H (intrinsic)	2.8 (+1.3, -1.1) × 10²¹ cm^-2
z of absorber	0
Photon index	2.61 (+0.48, -0.43)
Flux (0.3-10 keV) (Observed)	4.46 (+0.92, -0.73) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.07 (+1.75, -0.20) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.1 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7.4 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	113.92 (122)
Exposure time	15.1 ks