NSV 4031 is a gamma Doradus variable after all

Abstract

NSV 4031 has already been comprehensively debunked as an eclipsing binary, but the data available at that time only allowed a relatively poor limit of a few hundredths of a magnitude on any other variation. Analysis of more recent TESS data shows that the star is a multiperiodic variable, with dominant periods in the 1-day range and semi-amplitudes of 3 mmag. In total some 19 periods have been recovered with semi-amplitudes above 0.1 mmag, suggesting that the star is a gamma Doradus variable, with no detectable variations at frequencies above 2 c/d.