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Swift-XRT spectra of GRB 081228

Last updated after receiving ObsID 00338338005, version 16

Data were analysed using HEASOFT version 6.35.2

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Add time-sliced spectrum.

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 86 to 98114 s)

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PC mode spectrum of Time-averaged

PC mode. Mean photon arrival: T0+25214 s

N_H (Galactic)	1.39 × 10²¹ cm^-2
N_H (intrinsic)	7.2 (+20.6, -7.2) × 10²⁰ cm^-2
z of absorber	0
Photon index	2.0 (+0.6, -0.4)
Flux (0.3-10 keV) (Observed)	2.4 (+0.9, -0.6) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.2 (+0.8, -0.7) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	3.56 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.85 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	79.49 (71)
Spectrum exposure	21.9 ks

Late Time spectrum (T0 + 4001 to 98114 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+38570 s

N_H (Galactic)	1.39 × 10²¹ cm^-2
N_H (intrinsic)	1.4 (+2.8, -1.4) × 10²¹ cm^-2
z of absorber	0
Photon index	2.1 (+0.8, -0.6)
Flux (0.3-10 keV) (Observed)	1.3 (+0.6, -0.4) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.93 (+1.37, -0.51) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	3.48 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.22 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	67.13 (49)
Spectrum exposure	21.5 ks