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Table 2.

Size of the SRV sample at each successive filtering step.

Step LMC SMC Total
0 OGLE-III SRVs 11 132 2222 13 354
1 θ2MASS ≤ 1″ 11 106 2215 13 321
θGaia ≤ 1″ 11 128 2218 13 346
All θ ≤ 1″ 11 105 2213 13 318
Rejected 27 9 36

2 3 periods 2931 1764 4695
2 periods 5948 300 6248
1 period 2166 124 2290
Total 11 045 2188 13 223
Rejected 60 25 85

3 Pa on C′, Pb on C 2819 799 3618
Pa on C, Pb on C′ 1884 545 2429
Only Pa on C′ 3349 308 3657
Only Pa on C 2301 411 2712
Total 10 353 2063 12 416
Rejected 692 125 817

3′ C-rich 4647 1261 5908
O-rich 5464 645 6109
Uncertain 242 157 399

Notes. The steps are: starting sample (0), well-matched sources (1), exclusion of non-pulsation periods (2), and mode assignment (3, corresponding to the final sample). The last few rows (3′) give the numbers of sources in the final sample by chemical type, according to the approach described in Sect. 3.1. We note that all SRVs with θGaia DR2 ≤ 1″ also have θGaia EDR3 ≤ 1″, hence Gaia DR2 and EDR3 are not distinguished in the rows describing step (1).

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