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Home All issues Volume 678 (October 2023) A&A, 678 (2023) A149 Full HTML
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Table E.1.

Statistical significance of burst periodicities in this study using different methods.

FRB 20201020A FRB 20180916B A17 FRB 20180916B A53 FRB 20210206A FRB 20210213A
η Percentile σ Percentile σ Percentile σ Percentile σ Percentile σ
rχ2,Π
0 99.06 2.60 95.43 2.00 99.12 2.62 96.26 2.08 99.71 2.98
0.1 98.73 2.49 94.18 1.89 98.56 2.45 95.30 1.99 99.64 2.92
0.2 98.34 2.40 92.60 1.79 97.81 2.29 93.82 1.87 99.47 2.79
0.3 97.64 2.26 90.24 1.66 96.33 2.09 91.59 1.73 99.07 2.60
0.4 96.60 2.12 87.09 1.52 93.95 1.88 88.47 1.57 98.58 2.45
rχ2,P
0 99.35 2.72 95.51 2.01 98.13 2.35 97.14 2.19 99.85 3.18
0.1 99.16 2.63 94.22 1.90 96.97 2.17 96.14 2.07 99.79 3.07
0.2 98.76 2.50 92.32 1.77 95.15 1.97 94.72 1.94 99.67 2.94
0.3 98.22 2.37 89.36 1.61 91.92 1.75 92.34 1.77 99.45 2.78
0.4 97.25 2.20 84.61 1.43 86.70 1.50 88.36 1.57 99.07 2.60
0 87.41 1.53 99.82 3.12 72.25 1.09 92.54 1.78 99.22 2.66
0.1 85.93 1.47 99.78 3.06 69.10 1.02 91.77 1.74 99.12 2.62
0.2 84.17 1.41 99.75 3.03 65.43 0.94 90.89 1.69 99.10 2.61
0.3 81.54 1.33 99.72 2.99 60.75 0.85 89.65 1.63 98.93 2.55
0.4 78.57 1.24 99.71 2.98 54.69 0.75 87.91 1.55 98.75 2.50
0 91.40 1.72 99.86 3.19 89.22 1.61 96.74 2.14 99.45 2.77
0.1 90.13 1.65 99.84 3.15 87.85 1.55 96.29 2.08 99.39 2.74
0.2 88.50 1.58 99.81 3.11 85.75 1.47 95.59 2.01 99.29 2.69
0.3 86.21 1.48 99.79 3.08 83.04 1.37 94.77 1.94 99.22 2.66
0.4 83.44 1.39 99.74 3.01 79.61 1.27 93.92 1.87 99.06 2.60

Notes. For each burst, the periodicity significance is estimated using the reduced chi-square statistic (rχ2) and the statistic (Equations 3 and 4), and subcomponent spacings simulated from a rectangular (Π) and a shifted poissonian (P) distribution. the percentiles give respectively the percentage of simulations with statistics above the measured rχ2 or below the measured . σ gives the equivalent Gaussian significance.

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