The OmegaWhite Survey for Short-Period Variable Stars - I : Overview and First Results
- Macfarlane, S. A.
- Toma, R.
- Ramsay, G.
- Groot, Paul J.
- Woudt, P. A.
- Drew, J.E.
- Barentsen, G.
- Eisloffel, J.
DOIAbstract
We present the goals, strategy and first results of the OmegaWhite survey: a wide-field high-cadence g-band synoptic survey which aims to unveil the Galactic population of short-period variable stars (with periods <80 min), including ultracompact binary star systems and stellar pulsators. The ultimate goal of OmegaWhite is to cover 400 deg2 along the Galactic plane reaching a depth of g = 21.5 mag (10σ), using OmegaCam on the VLT Survey Telescope (VST). The fields are selected to overlap with surveys such as the Galactic Bulge Survey and the VST Photometric Hα Survey of the Southern Galactic Plane for multiband colour information. Each field is observed using 38 exposures of 39 s each, with a median cadence of ∼2.7 min for a total duration ...
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