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The University of New South Wales Extrasolar Planet Search: a catalogue of variable stars from fields observed between 2004 and 2007
We present a new catalogue of variable stars compiled from the datataken for the University of New South Wales Extrasolar Planet Search.From 2004 October to 2007 May, 25 target fields were each observed forone to four months, resulting in ~87000 high-precision light curves with1600-4400 data points. We have extracted a total of 850 variable lightcurves, 659 of which do not have a counterpart in the General Catalogueof Variable Stars, the New Suspected Variables catalogue or the All SkyAutomated Survey southern variable star catalogue. The catalogue isdetailed here, and includes 142 Algol-type eclipsing binaries, 23 ?Lyrae-type eclipsing binaries, 218 contact eclipsing binaries, 53 RRLyrae stars, 26 Cepheid stars, 13 rotationally variable active stars,153 uncategorized pulsating stars with periods <10 d, including? Scuti stars, and 222 long period variables with variability ontime-scales of >10 d. As a general application of variable starsdiscovered by extrasolar planet transit search projects, we discussseveral astrophysical problems which could benefit from carefullyselected samples of bright variables. These include (i) the quest forcontact binaries with the smallest mass ratio, which could be used totest theories of binary mergers; (ii) detached eclipsing binaries withpre-main-sequence components, which are important test objects forcalibrating stellar evolutionary models and (iii) RR Lyrae-typepulsating stars exhibiting the Blazhko effect, which is one of the lastgreat mysteries of pulsating star research.
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