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Swift-XRT spectra of GRB 121211A

Last updated after receiving ObsID 00541200002, version 9.

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The spectral fits assume a redshift: 1.023 (GCN 14059)

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Time-averaged spectrum (T0 + 95 to 121780 s)

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WT and PC mode spectra of GRB 121211A

WT mode. Mean photon arrival: T0+195 s

N_H (Galactic)	9.5 × 10¹⁹ cm^-2
N_H (intrinsic)	9.13 (+0.51, -0.48) × 10²¹ cm^-2
z of absorber	1.023
Photon index	1.945 (+0.035, -0.034)
Flux (0.3-10 keV) (Observed)	3.961 (+0.082, -0.080) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.58 (+0.11, -0.10) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.8 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.3 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	739.30 (755)
Exposure time	199 s

PC mode. Mean photon arrival: T0+18575 s

N_H (Galactic)	9.5 × 10¹⁹ cm^-2
N_H (intrinsic)	4.59 (+1.07, -0.99) × 10²¹ cm^-2
z of absorber	1.023
Photon index	2.07 (+0.12, -0.11)
Flux (0.3-10 keV) (Observed)	2.82 (+0.19, -0.18) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.77 (+0.23, -0.22) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.5 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.7 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	351.84 (386)
Exposure time	20.3 ks

Late Time spectrum (T0 + 4000 to 121780 s)

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PC mode spectrum of GRB 121211A

PC mode. Mean photon arrival: T0+18904 s

N_H (Galactic)	9.5 × 10¹⁹ cm^-2
N_H (intrinsic)	4.47 (+1.07, -0.99) × 10²¹ cm^-2
z of absorber	1.023
Photon index	2.06 (+0.12, -0.11)
Flux (0.3-10 keV) (Observed)	2.78 (+0.19, -0.18) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.70 (+0.23, -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)	4.7 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	346.95 (383)
Exposure time	20.2 ks