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Swift-XRT spectra of GRB 100902A

Last updated after receiving ObsID 00433160018, version 12.

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Time-averaged spectrum (T0 + 320 to 71537 s)

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WT and PC mode spectra of GRB 100902A

WT mode. Mean photon arrival: T0+441 s

N_H (Galactic)	1.1 × 10²¹ cm^-2
N_H (intrinsic)	3.10 (+0.18, -0.17) × 10²¹ cm^-2
z of absorber	0
Photon index	2.409 (+0.050, -0.049)
Flux (0.3-10 keV) (Observed)	2.914 (+0.067, -0.065) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	6.76 (+0.29, -0.17) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.5 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	8.2 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	759.91 (681)
Exposure time	301 s

PC mode. Mean photon arrival: T0+11227 s

N_H (Galactic)	1.1 × 10²¹ cm^-2
N_H (intrinsic)	3.37 (+0.63, -0.59) × 10²¹ cm^-2
z of absorber	0
Photon index	2.36 (+0.16, -0.15)
Flux (0.3-10 keV) (Observed)	4.51 (+0.33, -0.30) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.02 (+0.15, -0.26) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	3.8 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	8.5 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	348.40 (385)
Exposure time	15.1 ks

Late Time spectrum (T0 + 6166 to 71537 s)

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PC mode spectrum of GRB 100902A

PC mode. Mean photon arrival: T0+21578 s

N_H (Galactic)	1.1 × 10²¹ cm^-2
N_H (intrinsic)	2.79 (+0.85, -0.77) × 10²¹ cm^-2
z of absorber	0
Photon index	2.28 (+0.23, -0.21)
Flux (0.3-10 keV) (Observed)	2.10 (+0.23, -0.21) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.27 (+0.30, -0.59) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.8 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7.7 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	262.94 (281)
Exposure time	12.8 ks