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Swift-XRT spectra of GRB 121128A

Last updated after receiving ObsID 00539866007, version 11

Data were analysed using HEASOFT version 6.22

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The spectral fits assume a redshift: 2.2 (GCN 14009)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 83 to 64546 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+117 s

N_H (Galactic)	3.32 × 10²¹ cm^-2
N_H (intrinsic)	2.7 (+6.6, -2.7) × 10²¹ cm^-2
z of absorber	2.2
Photon index	2.346 (+0.112, -0.098)
Flux (0.3-10 keV) (Observed)	5.9 (+0.4, -0.3) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.10 (+0.06, -0.07) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.11 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.81 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	367.87 (407)
Spectrum exposure	108 s

PC mode. Mean photon arrival: T0+4936 s

N_H (Galactic)	3.32 × 10²¹ cm^-2
N_H (intrinsic)	5 (+8, -5) × 10²¹ cm^-2
z of absorber	2.2
Photon index	1.86 (+0.09, -0.09)
Flux (0.3-10 keV) (Observed)	1.33 (+0.08, -0.07) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.899 (+0.137, -0.077) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.18 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.95 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	468.38 (488)
Spectrum exposure	16.6 ks

Late Time spectrum (T0 + 6936 to 64546 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+22107 s

N_H (Galactic)	3.32 × 10²¹ cm^-2
N_H (intrinsic)	6.3 (+18.6, -6.3) × 10²¹ cm^-2
z of absorber	2.2
Photon index	1.98 (+0.23, -0.20)
Flux (0.3-10 keV) (Observed)	1.12 (+0.16, -0.14) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.70 (+0.22, -0.20) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.88 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.89 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	170.66 (222)
Spectrum exposure	14.3 ks