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Swift-XRT spectra of GRB 090308

Last updated after receiving ObsID 00345777005, version 21

Data were analysed using HEASOFT version 6.35.2

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 130 to 103703 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+150 s

N_H (Galactic)	1.24 × 10²¹ cm^-2
N_H (intrinsic)	5.5 (+3.5, -2.7) × 10²¹ cm^-2
z of absorber	0
Photon index	1.8 (+0.4, -0.4)
Flux (0.3-10 keV) (Observed)	2.3 (+0.5, -0.4) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.59 (+1.19, -0.65) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	4.16 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.48 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	127.75 (162)
Spectrum exposure	46 s

PC mode. Mean photon arrival: T0+15640 s

N_H (Galactic)	1.24 × 10²¹ cm^-2
N_H (intrinsic)	5.0 (+2.8, -2.4) × 10²¹ cm^-2
z of absorber	0
Photon index	2.1 (+0.4, -0.4)
Flux (0.3-10 keV) (Observed)	4.0 (+1.0, -0.8) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	7 (+3, -3) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	4.13 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7.71 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	118.98 (149)
Spectrum exposure	36.4 ks

Late Time spectrum (T0 + 4392 to 103703 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+42749 s

N_H (Galactic)	1.24 × 10²¹ cm^-2
N_H (intrinsic)	4 (+5, -3) × 10²¹ cm^-2
z of absorber	0
Photon index	2.2 (+0.8, -0.6)
Flux (0.3-10 keV) (Observed)	9.8 (+4.0, -2.7) × 10^-14 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.82 (+1.91, -0.45) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	3.66 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.78 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	34.52 (60)
Spectrum exposure	36.0 ks