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Swift-XRT spectra of GRB 090401B

Last updated after receiving ObsID 00348152012, version 13.

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Time-averaged spectrum (T0 + 79 to 53421 s)

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WT and PC mode spectra of GRB 090401B

WT mode. Mean photon arrival: T0+406 s

N_H (Galactic)	2.3 × 10²¹ cm^-2
N_H (intrinsic)	1.92 (+0.13, -0.13) × 10²¹ cm^-2
z of absorber	0
Photon index	1.799 (+0.027, -0.027)
Flux (0.3-10 keV) (Observed)	1.361 (+0.019, -0.019) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.052 (+0.029, -0.030) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	5 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	910.11 (858)
Exposure time	1.3 ks

PC mode. Mean photon arrival: T0+17140 s

N_H (Galactic)	2.3 × 10²¹ cm^-2
N_H (intrinsic)	1.7 (+0.5, -0.5) × 10²¹ cm^-2
z of absorber	0
Photon index	1.93 (+0.11, -0.10)
Flux (0.3-10 keV) (Observed)	6.4 (+0.4, -0.3) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.03 (+0.07, -0.06) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	5 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	506.99 (541)
Exposure time	22.1 ks

Late Time spectrum (T0 + 4755 to 53421 s)

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PC mode spectrum of GRB 090401B

PC mode. Mean photon arrival: T0+17061 s

N_H (Galactic)	2.3 × 10²¹ cm^-2
N_H (intrinsic)	1.7 (+0.5, -0.5) × 10²¹ cm^-2
z of absorber	0
Photon index	1.94 (+0.11, -0.10)
Flux (0.3-10 keV) (Observed)	6.5 (+0.4, -0.3) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.05 (+0.07, -0.06) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	5 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	509.37 (542)
Exposure time	22.1 ks