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Table 1

Light curve amplitudes (peak-to-peak for the filtered light curves, Fourier amplitudes for the photographic data) of the phased light curves and periods of the double-mode variable V7 in the different available data sets.

Data Observed A p A B A V A I P 0 P 1 k p k B k V k I Type
(yr) (mag) (mag) (mag) (mag) (d) (d)

VO59 1950 0.33 0.5174(1) 0.3881(6) 3.0(5) RR01
R54 19511953 0.36 0.54118(4) 0.387951(5) 5.1(9) RR01?
C93 19861991 0.87 0.519742(8) 0.387958(2) 3.0(3) RR01
W94 1993 0.87 0.63 0.53 0.51929(8) 0.38801(2) 3.0(3) 2.5(2) 1.4(1) RR01
K15 2013 0.62 0.41 0.52028(8) 0.38812(2) 1.8(1) 1.7(1) RR01

Notes. All periods have been recalculated with the software Period04, and amplitudes were also re-measured from the light curves. The ratio of the FO to F amplitudes, k, is also given for each filter, and p denotes photographic data. We do not include B94 data because of poor phase coverage. The number in parentheses next to each value is the uncertainty on the last decimal point.

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