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Swift-XRT spectra of GRB 150915A

Last updated after receiving ObsID 00655721003, version 4

Data were analysed using HEASOFT version 6.32

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Add time-sliced spectrum.

The spectral fits assume a redshift: 1.968 (GCN 18318)

Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 134 to 50902 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+195 s

N_H (Galactic)	8.65 × 10²⁰ cm^-2
N_H (intrinsic)	8.8 (+1.7, -1.6) × 10²⁰ cm^-2
z of absorber	1.968
Photon index	1.80 (+0.05, -0.05)
Flux (0.3-10 keV) (Observed)	1.56 (+0.04, -0.04) × 10^-9 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.95 (+0.04, -0.04) × 10^-9 erg cm^-2 s^-1
Counts to flux (obs)	3.77 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.71 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	611.44 (672)
Spectrum exposure	235 s

PC mode. Mean photon arrival: T0+3383 s

N_H (Galactic)	8.65 × 10²⁰ cm^-2
N_H (intrinsic)	5.0 (+15.6, -5.0) × 10²⁰ cm^-2
z of absorber	1.968
Photon index	2.3 (+0.6, -0.4)
Flux (0.3-10 keV) (Observed)	1.4 (+0.4, -0.3) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.1 (+0.5, -0.4) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	2.99 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	4.29 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	76.14 (95)
Spectrum exposure	7.5 ks

Late Time spectrum (T0 + 4094 to 50902 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+32238 s

N_H (Galactic)	8.65 × 10²⁰ cm^-2
N_H (intrinsic)	4.2 (+11.8, -4.2) × 10²¹ cm^-2
z of absorber	1.968
Photon index	4.8 (+3.1, -2.9)
Flux (0.3-10 keV) (Observed)	4.4 (+5.4, -2.5) × 10^-14 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	9 (+1.00 × 10¹³, -5) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	1.88 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.87 × 10^-10 erg cm^-2 ct^-1
W-stat (dof) What's this?	8.83 (9)
Spectrum exposure	7.1 ks