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Swift-XRT spectra of GRB 121229A

Last updated after receiving ObsID 00544347003, version 9

Data were analysed using HEASOFT version 6.29

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Add time-sliced spectrum.

The spectral fits assume a redshift: 2.707 (GCN 14120)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 152 to 75035 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+422 s

N_H (Galactic)	2.08 × 10²¹ cm^-2
N_H (intrinsic)	9 (+4, -4) × 10²¹ cm^-2
z of absorber	2.707
Photon index	2.05 (+0.05, -0.05)
Flux (0.3-10 keV) (Observed)	7.51 (+0.22, -0.22) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.091 (+0.029, -0.028) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.44 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.00 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	591.47 (624)
Spectrum exposure	371 s

PC mode. Mean photon arrival: T0+14680 s

N_H (Galactic)	2.08 × 10²¹ cm^-2
N_H (intrinsic)	0 (+8.76 × 10²¹, -0) cm^-2
z of absorber	2.707
Photon index	2.21 (+0.20, -0.18)
Flux (0.3-10 keV) (Observed)	9.8 (+1.3, -1.3) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.49 (+0.17, -0.16) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.15 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.78 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	139.27 (168)
Spectrum exposure	14.6 ks

Late Time spectrum (T0 + 4000 to 75035 s)

Download spectral files for Late Time spectrum.

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+34284 s

N_H (Galactic)	2.08 × 10²¹ cm^-2
N_H (intrinsic)	0 (+3.09 × 10²², -0) cm^-2
z of absorber	2.707
Photon index	1.99 (+0.41, -0.28)
Flux (0.3-10 keV) (Observed)	3.6 (+0.8, -0.8) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.90 (+1.04, -0.78) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	3.60 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.95 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	88.00 (84)
Spectrum exposure	14.4 ks