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Swift-XRT spectra of GRB 170912A

Last updated after receiving ObsID 00772006003, version 8

Data were analysed using HEASOFT version 6.35.2

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 122 to 17002 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+129 s

N_H (Galactic)	3.14 × 10²¹ cm^-2
N_H (intrinsic)	0 (+1.54 × 10²¹, -0) cm^-2
z of absorber	0
Photon index	2.67 (+1.24, -0.33)
Flux (0.3-10 keV) (Observed)	1.1 (+0.4, -0.3) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.44 (+0.97, -1.25) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	2.53 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.80 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	38.40 (51)
Spectrum exposure	17 s

PC mode. Mean photon arrival: T0+3061 s

N_H (Galactic)	3.14 × 10²¹ cm^-2
N_H (intrinsic)	0 (+1.32 × 10²¹, -0) cm^-2
z of absorber	0
Photon index	1.96 (+0.42, -0.20)
Flux (0.3-10 keV) (Observed)	1.7 (+0.3, -0.4) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.3 (+0.7, -0.5) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.71 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.06 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	79.15 (92)
Spectrum exposure	3.5 ks

Late Time spectrum (T0 + 5480 to 17002 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+13532 s

N_H (Galactic)	3.14 × 10²¹ cm^-2
N_H (intrinsic)	0 (+1.02 × 10²², -0) cm^-2
z of absorber	0
Photon index	1.14 (+1.33, -0.46)
Flux (0.3-10 keV) (Observed)	7 (+5, -4) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	8 (+6, -3) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	5.97 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.57 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	27.14 (19)
Spectrum exposure	2.2 ks