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Swift-XRT spectra of GRB 121217A

Last updated after receiving ObsID 00542441001, version 4.

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Time-averaged spectrum (T0 + 70 to 59251 s)

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WT and PC mode spectra of GRB 121217A

WT mode. Mean photon arrival: T0+95 s

N_H (Galactic)	4 × 10²¹ cm^-2
N_H (intrinsic)	0 (+2.0 × 10²⁰, -0) cm^-2
z of absorber	0
Photon index	2.144 (+0.112, -0.076)
Flux (0.3-10 keV) (Observed)	5.1 (+0.4, -0.3) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	9.2 (+0.5, -0.5) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	4 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	327.89 (402)
Exposure time	78 s

PC mode. Mean photon arrival: T0+17556 s

N_H (Galactic)	4 × 10²¹ cm^-2
N_H (intrinsic)	2.6 (+4.3, -2.6) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.94 (+0.09, -0.09)
Flux (0.3-10 keV) (Observed)	1.29 (+0.06, -0.06) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.090 (+0.129, -0.090) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	521.10 (564)
Exposure time	13.5 ks

Late Time spectrum (T0 + 5507 to 59251 s)

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PC mode spectrum of GRB 121217A

PC mode. Mean photon arrival: T0+22833 s

N_H (Galactic)	4 × 10²¹ cm^-2
N_H (intrinsic)	5 (+5, -5) × 10²⁰ cm^-2
z of absorber	0
Photon index	2.05 (+0.11, -0.11)
Flux (0.3-10 keV) (Observed)	8.8 (+0.5, -0.5) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.550 (+0.125, -0.095) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	453.26 (503)
Exposure time	12.8 ks