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Swift-XRT spectra of GRB 170728B

Last updated after receiving ObsID 00765130009, version 4

Data were analysed using HEASOFT version 6.29

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 472 to 19247 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+584 s

N_H (Galactic)	3.17 × 10²⁰ cm^-2
N_H (intrinsic)	2.2 (+0.4, -0.4) × 10²¹ cm^-2
z of absorber	0
Photon index	2.02 (+0.12, -0.11)
Flux (0.3-10 keV) (Observed)	3.20 (+0.21, -0.20) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.63 (+0.24, -0.26) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	3.49 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.04 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	468.74 (459)
Spectrum exposure	228 s

PC mode. Mean photon arrival: T0+7709 s

N_H (Galactic)	3.17 × 10²⁰ cm^-2
N_H (intrinsic)	2.08 (+0.31, -0.29) × 10²¹ cm^-2
z of absorber	0
Photon index	1.79 (+0.08, -0.07)
Flux (0.3-10 keV) (Observed)	3.36 (+0.15, -0.15) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4.366 (+0.156, -0.077) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.05 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.27 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	560.73 (580)
Spectrum exposure	8.5 ks

Late Time spectrum (T0 + 6231 to 19247 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+10252 s

N_H (Galactic)	3.17 × 10²⁰ cm^-2
N_H (intrinsic)	2.1 (+0.4, -0.4) × 10²¹ cm^-2
z of absorber	0
Photon index	1.79 (+0.09, -0.09)
Flux (0.3-10 keV) (Observed)	2.43 (+0.13, -0.12) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.16 (+0.13, -0.13) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.08 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.31 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	501.07 (530)
Spectrum exposure	6.3 ks