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Table 1

Object statistics used in multiplicity calculations.

EW-type EB-type EA-type

1 Total objects considered 2844 5073 5323
2 Period change found by code 2305 3227 3076
3 Objects with χ2 ratio 1.05a 1414 1395 1797
4 Objects without apparent period changeb 1430 3678 3526
5 Objects checked visually 679 436 806
6 Period change confirmed visually 480 167 189
7 Period change rejected visually 88 50 48
8 Wrong period detected visually 24 33 340
9 Unclear cases on visual check 87 186 229

10 Corrected count of genuine period changesc 1000 534 421
11 Corrected count of wrong periodsd 50 106 758
12 Corrected count of unclear casese 364 2164 1512
13 Corrected count of valid objectsf 2430 2803 3053

14 Corrected period change percentageg 41.2% 19.1% 13.8%

Notes.

(a)

See Lohr et al. (2014) for explanation of this ratio.

(b)

I.e. row 1 row 3.

(c)

Obtained by extending the confirmed period change ratio (row 6/row 5) to all objects with plausibly-significant χ2 ratios (row 3).

(d)

Obtained by extending the detected wrong period ratio (row 8/row 5) to all objects with plausibly-significant χ2 ratios (row 3).

(e)

Obtained by extending the unclear cases ratio (row 9/row 5) to all objects considered (row 1).

(f)

I.e. total objects considered minus expected objects with wrong periods or unclear cases (row 1 (row 11 + row 12)).

(g)

I.e. (row 10/row 13) × 100%.

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