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Swift-XRT spectra of GRB 081228

Last updated after receiving ObsID 00338338005, version 15.

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Time-averaged spectrum (T0 + 81 to 98094 s)

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PC mode spectrum of GRB 081228

PC mode. Mean photon arrival: T0+27358 s

N_H (Galactic)	8.8 × 10²⁰ cm^-2
N_H (intrinsic)	6.0 (+16.4, -6.0) × 10²⁰ cm^-2
z of absorber	0
Photon index	2.01 (+0.68, -0.49)
Flux (0.3-10 keV) (Observed)	1.98 (+0.74, -0.55) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.71 (+0.80, -0.66) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	3.7 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.1 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	78.51 (68)
Exposure time	21.9 ks

Late Time spectrum (T0 + 4000 to 98094 s)

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PC mode spectrum of GRB 081228

PC mode. Mean photon arrival: T0+38570 s

N_H (Galactic)	8.8 × 10²⁰ cm^-2
N_H (intrinsic)	1.2 (+2.3, -1.2) × 10²¹ cm^-2
z of absorber	0
Photon index	2.15 (+0.82, -0.66)
Flux (0.3-10 keV) (Observed)	1.20 (+0.54, -0.36) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.90 (+2.76, -0.56) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	3.5 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.6 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	71.00 (48)
Exposure time	21.4 ks