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Swift-XRT spectra of GRB 121123A

Last updated after receiving ObsID 00539358001, version 2.

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Time-averaged spectrum (T0 + 129 to 41868 s)

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WT and PC mode spectra of GRB 121123A

WT mode. Mean photon arrival: T0+387 s

N_H (Galactic)	4 × 10²⁰ cm^-2
N_H (intrinsic)	4.9 (+0.6, -0.6) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.448 (+0.023, -0.022)
Flux (0.3-10 keV) (Observed)	3.16 (+0.05, -0.05) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.50 (+0.04, -0.04) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	5 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	895.03 (879)
Spectrum exposure	659 s

PC mode. Mean photon arrival: T0+12400 s

N_H (Galactic)	4 × 10²⁰ cm^-2
N_H (intrinsic)	1.7 (+2.2, -1.7) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.93 (+0.11, -0.10)
Flux (0.3-10 keV) (Observed)	5.8 (+0.3, -0.3) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	6.71 (+0.33, -0.29) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	405.87 (451)
Spectrum exposure	15.6 ks

Late Time spectrum (T0 + 4726 to 41868 s)

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PC mode spectrum of GRB 121123A

PC mode. Mean photon arrival: T0+15673 s

N_H (Galactic)	4 × 10²⁰ cm^-2
N_H (intrinsic)	3.0 (+2.6, -2.5) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.96 (+0.12, -0.12)
Flux (0.3-10 keV) (Observed)	4.07 (+0.28, -0.26) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.89 (+0.28, -0.25) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	372.71 (402)
Spectrum exposure	14.9 ks