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Swift-XRT spectra of GRB 090727

Last updated after receiving ObsID 00358520026, version 15.

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Time-averaged spectrum (T0 + 91 to 57820 s)

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WT and PC mode spectra of GRB 090727

WT mode. Mean photon arrival: T0+276 s

N_H (Galactic)	2.5 × 10²¹ cm^-2
N_H (intrinsic)	2.5 (+1.4, -1.2) × 10²¹ cm^-2
z of absorber	0
Photon index	1.44 (+0.20, -0.19)
Flux (0.3-10 keV) (Observed)	1.29 (+0.14, -0.12) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.69 (+0.14, -0.14) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	6.1 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	8.0 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	317.12 (420)
Exposure time	51 s

PC mode. Mean photon arrival: T0+13372 s

N_H (Galactic)	2.5 × 10²¹ cm^-2
N_H (intrinsic)	1.5 (+9.6, -1.5) × 10²⁰ cm^-2
z of absorber	0
Photon index	1.60 (+0.23, -0.15)
Flux (0.3-10 keV) (Observed)	1.84 (+0.22, -0.22) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.36 (+0.25, -0.22) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	5.1 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.5 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	209.48 (285)
Exposure time	24.0 ks

Late Time spectrum (T0 + 4000 to 57820 s)

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PC mode spectrum of GRB 090727

PC mode. Mean photon arrival: T0+24176 s

N_H (Galactic)	2.5 × 10²¹ cm^-2
N_H (intrinsic)	5.8 (+11.8, -5.8) × 10²⁰ cm^-2
z of absorber	0
Photon index	2.19 (+0.34, -0.29)
Flux (0.3-10 keV) (Observed)	5.14 (+0.89, -0.75) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	9.2 (+2.5, -1.6) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	3.8 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.7 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	130.70 (168)
Exposure time	23.8 ks