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Table A.2.

Periodicity candidates previously reported in the literature

Association Period Local Period in References
Name (yr) Significance literature (yr)
PKS 0405−385 3.0±0.4 4.8σ ∼2.8 Gong et al. (2022)
PKS 0426−380 3.5±0.5 4.8σ ∼3.6, ∼3.4 Ait Benkhali et al. (2020), Peñil et al. (2022)
PKS 0454−234 3.6±0.4 4.8σ ∼3.6 Peñil et al. (2022)
S3 0458−024 1.0±0.1 4.8σ ∼3.8 Peñil et al. (2022)
TXS 0518+211 2.8±0.4 4.8σ ∼3.1 Peñil et al. (2022)
OJ 014 4.7±0.9 4.8σ ∼4.1 Peñil et al. (2022)
S5 1044+71 3.1±0.4 4.8σ ∼3.1 Wang et al. (2022), Ren et al. (2023)
S4 1144+40 3.3±0.5 4.8σ ∼3.3 Peñil et al. (2022)
B2 1520+31 3.4±0.6 4.8σ ∼0.2 Gupta et al. (2019), Ren et al. (2023)
PG 1553+113 2.2±0.2 4.8σ ∼2.2 Prokhorov & Moraghan (2017), Sandrinelli et al. (2018)
Peñil et al. (2022), Rueda et al. (2022)
3C 66A 2.3±0.2 4.6σ ∼2.3 (V−band) Otero-Santos et al. (2020), Cheng et al. (2022)
S5 0716+71 2.9±0.3 4.5σ ∼2.7 Peñil et al. (2022)
PKS 0208−512 2.5±0.3 4.5σ ∼3.8, ∼2.6 Peñil et al. (2020, 2022), Rueda et al. (2022)
PKS 2155−304 1.7±0.1 4.5σ ∼1.7, ∼1.8 Prokhorov & Moraghan (2017), Sandrinelli et al. (2018)
Peñil et al. (2022), Rueda et al. (2022)
TXS 1452+516 2.1±0.2 4.2σ ∼2.1 Peñil et al. (2022), Rueda et al. (2022)
BL Lac 2.1±0.2 4.1σ ∼1.9 Prokhorov & Moraghan (2017), Sandrinelli et al. (2018),
Rueda et al. (2022)
GB6 J0043+3426 2.0±0.2 4.1σ ∼1.9, ∼1.8 Peñil et al. (2022), Rueda et al. (2022)
PMN J0948+0022 1.4±0.2 4.0σ ∼1.3 Zhang et al. (2017)
PKS 0447−439 1.9±0.3 4.0σ ∼2.5, ∼1.9, ∼2.0 Ait Benkhali et al. (2020), Peñil et al. (2022), Rueda et al. (2022)
PKS 0301−243 2.1±0.2 3.3σ ∼2.1, ∼2.0 Ait Benkhali et al. (2020), Peñil et al. (2022), Rueda et al. (2022)
PKS 0250−225 1.2±0.1 2.7σ ∼1.2 Peñil et al. (2022), Rueda et al. (2022)
PKS 1510−089 1.7±0.1 2.5σ ∼3.6 Li et al. (2023)

Notes. Periodicity candidates already discussed in the literature, sorted from larger to smaller local significance from our analysis. Note that the periods in the literature are typically given without uncertainties and also as local significance.

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