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Swift-XRT spectra of GRB 081028

Last updated after receiving ObsID 00332851011, version 15.

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The spectral fits assume a redshift: 3.038 (GCN 8434)

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Time-averaged spectrum (T0 + 196 to 70239 s)

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WT and PC mode spectra of GRB 081028

WT mode. Mean photon arrival: T0+399 s

N_H (Galactic)	4.0 × 10²⁰ cm^-2
N_H (intrinsic)	9.95 (+0.98, -0.96) × 10²¹ cm^-2
z of absorber	3.038
Photon index	1.860 (+0.023, -0.023)
Flux (0.3-10 keV) (Observed)	2.074 (+0.032, -0.032) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.475 (+0.031, -0.036) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.6 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.2 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	699.74 (800)
Exposure time	671 s

PC mode. Mean photon arrival: T0+30562 s

N_H (Galactic)	4.0 × 10²⁰ cm^-2
N_H (intrinsic)	2.5 (+2.4, -2.3) × 10²¹ cm^-2
z of absorber	3.038
Photon index	2.032 (+0.066, -0.065)
Flux (0.3-10 keV) (Observed)	4.63 (+0.19, -0.18) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.42 (+0.19, -0.21) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.5 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.0 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	463.64 (488)
Exposure time	29.3 ks

Late Time spectrum (T0 + 4050 to 70239 s)

Download spectral files for Late Time spectrum.

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PC mode spectrum of GRB 081028

PC mode. Mean photon arrival: T0+30562 s

N_H (Galactic)	4.0 × 10²⁰ cm^-2
N_H (intrinsic)	2.5 (+2.4, -2.3) × 10²¹ cm^-2
z of absorber	3.038
Photon index	2.031 (+0.066, -0.065)
Flux (0.3-10 keV) (Observed)	4.63 (+0.19, -0.18) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.42 (+0.19, -0.21) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.5 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.0 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	464.05 (488)
Exposure time	29.3 ks