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Swift-XRT spectra of GRB 241218A

Last updated after receiving ObsID 01275005001, version 17

Data were analysed using HEASOFT version 6.35.2

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Jump to: Time-averaged|Late Time

Time-averaged spectrum (T0 + 150 to 45135 s)

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WT and PC mode spectra of Time-averaged

WT mode. Mean photon arrival: T0+160 s

N_H (Galactic)	2.23 × 10²⁰ cm^-2
N_H (intrinsic)	0 (+1.41 × 10²¹, -0) cm^-2
z of absorber	0
Photon index	2.3 (+0.7, -0.3)
Flux (0.3-10 keV) (Observed)	1.24 (+0.30, -0.32) × 10^-10 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	1.3 (+0.4, -0.3) × 10^-10 erg cm^-2 s^-1
Counts to flux (obs)	2.61 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	2.84 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	38.82 (61)
Spectrum exposure	19 s

PC mode. Mean photon arrival: T0+2220 s

N_H (Galactic)	2.23 × 10²⁰ cm^-2
N_H (intrinsic)	7 (+509, -7) × 10¹⁸ cm^-2
z of absorber	0
Photon index	1.72 (+0.22, -0.13)
Flux (0.3-10 keV) (Observed)	2.43 (+0.27, -0.31) × 10^-12 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.54 (+0.27, -0.14) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	3.79 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	3.96 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	176.44 (206)
Spectrum exposure	8.3 ks

Late Time spectrum (T0 + 4775 to 45135 s)

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PC mode spectrum of Late Time

PC mode. Mean photon arrival: T0+12016 s

N_H (Galactic)	2.23 × 10²⁰ cm^-2
N_H (intrinsic)	2.3 (+3.2, -2.1) × 10²¹ cm^-2
z of absorber	0
Photon index	2.5 (+1.0, -0.8)
Flux (0.3-10 keV) (Observed)	2.66 (+1.28, -0.80) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5.0 (+15.7, -1.2) × 10^-13 erg cm^-2 s^-1
Counts to flux (obs)	2.92 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	5.52 × 10^-11 erg cm^-2 ct^-1
W-stat (dof) What's this?	45.75 (45)
Spectrum exposure	7.2 ks