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Swift-XRT spectra of GRB 070318

Last updated after receiving ObsID 00271019010, version 15.

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The spectral fits assume a redshift: 0.84 (GCN 6216)

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Time-averaged spectrum (T0 + 69 to 133220 s)

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WT and PC mode spectra of GRB 070318

WT mode. Mean photon arrival: T0+272 s

N_H (Galactic)	1.4 × 10²⁰ cm^-2
N_H (intrinsic)	4.89 (+0.62, -0.59) × 10²¹ cm^-2
z of absorber	0.84
Photon index	1.598 (+0.058, -0.057)
Flux (0.3-10 keV) (Observed)	7.80 (+0.31, -0.30) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	9.18 (+0.35, -0.20) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	4.4 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.2 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	620.68 (647)
Exposure time	369 s

PC mode. Mean photon arrival: T0+25413 s

N_H (Galactic)	1.4 × 10²⁰ cm^-2
N_H (intrinsic)	7.5 (+1.3, -1.2) × 10²¹ cm^-2
z of absorber	0.84
Photon index	1.97 (+0.11, -0.10)
Flux (0.3-10 keV) (Observed)	2.61 (+0.16, -0.15) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.76 (+0.20, -0.21) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.1 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.9 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	437.58 (479)
Exposure time	41.7 ks

Late Time spectrum (T0 + 5537 to 133220 s)

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PC mode spectrum of GRB 070318

PC mode. Mean photon arrival: T0+37307 s

N_H (Galactic)	1.4 × 10²⁰ cm^-2
N_H (intrinsic)	7.9 (+1.5, -1.4) × 10²¹ cm^-2
z of absorber	0.84
Photon index	2.13 (+0.14, -0.13)
Flux (0.3-10 keV) (Observed)	1.269 (+0.094, -0.087) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.00 (+0.14, -0.14) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.8 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.0 × 10^-11 erg cm^-2 ct^-1
C-stat (dof)	344.26 (392)
Exposure time	40.4 ks