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Swift-XRT spectra of GRB 120404A

Last updated after receiving ObsID 00519380006, version 11.

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The spectral fits assume a redshift: 2.87 (GCN 13217)

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Time-averaged spectrum (T0 + 136 to 33830 s)

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WT and PC mode spectra of GRB 120404A

WT mode. Mean photon arrival: T0+177 s

N_H (Galactic)	3.4 × 10²⁰ cm^-2
N_H (intrinsic)	3.9 (+4.8, -3.9) × 10²¹ cm^-2
z of absorber	2.87
Photon index	1.67 (+0.13, -0.13)
Flux (0.3-10 keV) (Observed)	3.41 (+0.33, -0.31) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.76 (+0.30, -0.26) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	3.8 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.2 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	248.53 (363)
Exposure time	99 s

PC mode. Mean photon arrival: T0+4495 s

N_H (Galactic)	3.4 × 10²⁰ cm^-2
N_H (intrinsic)	5.1 (+4.4, -4.0) × 10²¹ cm^-2
z of absorber	2.87
Photon index	1.90 (+0.12, -0.11)
Flux (0.3-10 keV) (Observed)	7.30 (+0.58, -0.53) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	8.46 (+0.59, -0.50) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.7 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.3 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	337.42 (360)
Exposure time	7.8 ks

Late Time spectrum (T0 + 4740 to 33830 s)

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PC mode spectrum of GRB 120404A

PC mode. Mean photon arrival: T0+7600 s

N_H (Galactic)	3.4 × 10²⁰ cm^-2
N_H (intrinsic)	6.6 (+5.7, -5.2) × 10²¹ cm^-2
z of absorber	2.87
Photon index	2.09 (+0.17, -0.16)
Flux (0.3-10 keV) (Observed)	3.15 (+0.33, -0.30) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.88 (+0.35, -0.42) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.4 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.1 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	255.85 (256)
Exposure time	6.6 ks