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Swift-XRT spectra of GRB 150720A

Last updated after receiving ObsID 00649706002, version 11

Data were analysed using HEASOFT version 6.32

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 138 to 45548 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+164 s

N_H (Galactic)	5.72 × 10²¹ cm^-2
N_H (intrinsic)	4.3 (+0.6, -0.6) × 10²¹ cm^-2
z of absorber	0
Photon index	3.096 (+0.101, -0.099)
Flux (0.3-10 keV) (Observed)	1.89 (+0.06, -0.06) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.10 (+0.16, -0.13) × 10^-8 erg cm^-2 s^-1
Counts to flux (obs)	2.88 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.67 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	493.30 (495)
Spectrum exposure	100 s

PC mode. Mean photon arrival: T0+7922 s

N_H (Galactic)	5.72 × 10²¹ cm^-2
N_H (intrinsic)	10 (+34, -10) × 10²⁰ cm^-2
z of absorber	0
Photon index	2.1 (+0.4, -0.3)
Flux (0.3-10 keV) (Observed)	1.27 (+0.26, -0.21) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.3 (+0.9, -0.4) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	4.17 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	7.45 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	145.20 (163)
Spectrum exposure	11.3 ks

Late Time spectrum (T0 + 4872 to 45548 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+18166 s

N_H (Galactic)	5.72 × 10²¹ cm^-2
N_H (intrinsic)	0 (+7.17 × 10²¹, -0) cm^-2
z of absorber	0
Photon index	1.82 (+0.72, -0.27)
Flux (0.3-10 keV) (Observed)	6.5 (+1.3, -1.6) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	9.8 (+7.9, -2.8) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	4.48 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	6.76 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	85.62 (79)
Spectrum exposure	9.9 ks