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Swift-XRT spectra of GRB 180728A

Last updated after receiving ObsID 00850471042, version 14

Data were analysed using HEASOFT version 6.35.2

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The spectral fits assume a redshift: 0.117 (GCN 23055)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 1736 to 100678 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+2636 s

N_H (Galactic)	3.16 × 10²¹ cm^-2
N_H (intrinsic)	9.9 (+2.2, -2.0) × 10²⁰ cm^-2
z of absorber	0.117
Photon index	1.81 (+0.03, -0.03)
Flux (0.3-10 keV) (Observed)	5.46 (+0.10, -0.10) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	7.66 (+0.12, -0.12) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	4.20 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.90 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	874.78 (793)
Spectrum exposure	1.9 ks

PC mode. Mean photon arrival: T0+40407 s

N_H (Galactic)	3.16 × 10²¹ cm^-2
N_H (intrinsic)	5.9 (+2.9, -2.7) × 10²⁰ cm^-2
z of absorber	0.117
Photon index	1.63 (+0.04, -0.04)
Flux (0.3-10 keV) (Observed)	4.27 (+0.11, -0.11) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.51 (+0.11, -0.11) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.74 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.13 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	757.93 (746)
Spectrum exposure	26.8 ks

Late Time spectrum (T0 + 7315 to 100678 s)

Download spectral files for Late Time spectrum.

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+40407 s

N_H (Galactic)	3.16 × 10²¹ cm^-2
N_H (intrinsic)	5.9 (+2.9, -2.7) × 10²⁰ cm^-2
z of absorber	0.117
Photon index	1.63 (+0.04, -0.04)
Flux (0.3-10 keV) (Observed)	4.27 (+0.11, -0.11) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.51 (+0.11, -0.11) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	4.74 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.13 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	757.93 (746)
Spectrum exposure	26.8 ks