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Swift-XRT spectra of GRB 121209A

Last updated after receiving ObsID 00540964000, version 16

Data were analysed using HEASOFT version 6.32

About these products.

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Add time-sliced spectrum.

The spectral fits assume a redshift: 2.1 (Kruhler et al. 2015)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 95 to 62945 s)

Download spectral files for Time-averaged spectrum.

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+98 s

N_H (Galactic)	4.40 × 10²⁰ cm^-2
N_H (intrinsic)	2.4 (+9.4, -2.4) × 10²² cm^-2
z of absorber	2.1
Photon index	1.50 (+1.04, -0.84)
Flux (0.3-10 keV) (Observed)	3.3 (+3.1, -1.5) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.8 (+2.7, -1.5) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	4.74 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.52 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	22.69 (15)
Spectrum exposure	6 s

PC mode. Mean photon arrival: T0+18880 s

N_H (Galactic)	4.40 × 10²⁰ cm^-2
N_H (intrinsic)	1.22 (+0.18, -0.17) × 10²³ cm^-2
z of absorber	2.1
Photon index	2.11 (+0.13, -0.12)
Flux (0.3-10 keV) (Observed)	4.33 (+0.29, -0.27) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	8.2 (+0.8, -0.7) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.12 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7.78 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	381.83 (461)
Spectrum exposure	23.1 ks

Late Time spectrum (T0 + 5240 to 62945 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+21423 s

N_H (Galactic)	4.40 × 10²⁰ cm^-2
N_H (intrinsic)	1.20 (+0.19, -0.17) × 10²³ cm^-2
z of absorber	2.1
Photon index	2.10 (+0.14, -0.13)
Flux (0.3-10 keV) (Observed)	3.54 (+0.25, -0.23) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	6.6 (+0.7, -0.6) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.13 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7.71 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	386.07 (430)
Spectrum exposure	22.7 ks