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Swift-XRT spectra of GRB 121128A

Last updated after receiving ObsID 00539866007, version 10

Data were analysed using HEASOFT version 6.15.1

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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 64526 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)	2.8 (+6.7, -2.8) × 10²¹ cm^-2
z of absorber	2.2
Photon index	2.344 (+0.113, -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, -0.09) × 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?	368.04 (407)
Spectrum exposure	108 s

PC mode. Mean photon arrival: T0+4909 s

N_H (Galactic)	3.32 × 10²¹ cm^-2
N_H (intrinsic)	6 (+8, -6) × 10²¹ cm^-2
z of absorber	2.2
Photon index	1.86 (+0.09, -0.09)
Flux (0.3-10 keV) (Observed)	1.36 (+0.08, -0.08) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.93 (+0.09, -0.07) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.19 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.94 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	469.92 (490)
Spectrum exposure	16.5 ks

Late Time spectrum (T0 + 6936 to 64526 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)	2.1 (+24.9, -2.1) × 10²¹ cm^-2
z of absorber	2.2
Photon index	1.95 (+0.15, -0.17)
Flux (0.3-10 keV) (Observed)	1.15 (+0.16, -0.16) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.69 (+0.16, -0.15) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.93 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.80 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	170.50 (222)
Spectrum exposure	14.2 ks