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Swift-XRT spectra of GRB 051221A

Last updated after receiving ObsID 00173780013, version 32.

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The spectral fits assume a redshift: 0.5465 (GCN 4384)

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Time-averaged spectrum (T0 + 93 to 65707 s)

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WT and PC mode spectra of GRB 051221A

WT mode. Mean photon arrival: T0+172 s

N_H (Galactic)	6 × 10²⁰ cm^-2
N_H (intrinsic)	1.5 (+0.9, -0.8) × 10²¹ cm^-2
z of absorber	0.5465
Photon index	2.09 (+0.21, -0.20)
Flux (0.3-10 keV) (Observed)	1.21 (+0.16, -0.14) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.65 (+0.17, -0.19) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	3 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	224.44 (263)
Exposure time	167 s

PC mode. Mean photon arrival: T0+14486 s

N_H (Galactic)	6 × 10²⁰ cm^-2
N_H (intrinsic)	1.9 (+0.7, -0.7) × 10²¹ cm^-2
z of absorber	0.5465
Photon index	2.06 (+0.14, -0.13)
Flux (0.3-10 keV) (Observed)	1.70 (+0.14, -0.13) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.34 (+0.18, -0.16) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	344.14 (346)
Exposure time	26.9 ks

Late Time spectrum (T0 + 5710 to 65707 s)

Download spectral files for Late Time spectrum.

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PC mode spectrum of GRB 051221A

PC mode. Mean photon arrival: T0+25358 s

N_H (Galactic)	6 × 10²⁰ cm^-2
N_H (intrinsic)	1.8 (+0.9, -0.9) × 10²¹ cm^-2
z of absorber	0.5465
Photon index	2.07 (+0.19, -0.18)
Flux (0.3-10 keV) (Observed)	1.03 (+0.11, -0.10) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.41 (+0.31, -0.13) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	226.64 (262)
Exposure time	24.6 ks