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Swift-XRT spectra of GRB 170903A

Last updated after receiving ObsID 00770528010, version 8

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 3435 to 39996 s)

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PC mode spectrum of Time-averaged

WT mode. Mean photon arrival: T0+3436 s

Can't find a valid fit for this spectrum

PC mode. Mean photon arrival: T0+14235 s

N_H (Galactic)	1.74 × 10²⁰ cm^-2
N_H (intrinsic)	5.1 (+1.0, -0.9) × 10²¹ cm^-2
z of absorber	0
Photon index	2.12 (+0.17, -0.17)
Flux (0.3-10 keV) (Observed)	4.5 (+0.4, -0.4) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	8.0 (+0.7, -0.7) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.84 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.83 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	310.53 (336)
Spectrum exposure	9.0 ks

Late Time spectrum (T0 + 4000 to 39996 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+15682 s

N_H (Galactic)	1.74 × 10²⁰ cm^-2
N_H (intrinsic)	5.16 (+1.06, -0.96) × 10²¹ cm^-2
z of absorber	0
Photon index	2.11 (+0.19, -0.18)
Flux (0.3-10 keV) (Observed)	4.2 (+0.4, -0.4) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	7.48 (+0.64, -1.51) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.86 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.84 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	281.86 (319)
Spectrum exposure	8.5 ks