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Swift-XRT spectra of GRB 170728B

Last updated after receiving ObsID 00765130009, version 4

Data were analysed using HEASOFT version 6.35.2

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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)	2.3 (+0.4, -0.4) × 10²¹ cm^-2
z of absorber	0
Photon index	2.03 (+0.12, -0.11)
Flux (0.3-10 keV) (Observed)	3.19 (+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)	3.47 × 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?	467.65 (459)
Spectrum exposure	228 s

PC mode. Mean photon arrival: T0+7045 s

N_H (Galactic)	3.17 × 10²⁰ cm^-2
N_H (intrinsic)	2.05 (+0.30, -0.29) × 10²¹ cm^-2
z of absorber	0
Photon index	1.79 (+0.07, -0.07)
Flux (0.3-10 keV) (Observed)	4.29 (+0.19, -0.18) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.56 (+0.20, -0.18) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.05 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.25 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	558.86 (586)
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+10603 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	1.82 (+0.10, -0.09)
Flux (0.3-10 keV) (Observed)	2.45 (+0.14, -0.13) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	3.24 (+0.15, -0.14) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.02 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.33 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	469.91 (507)
Spectrum exposure	6.3 ks