Browsing Unisa Research Output by Author "Zietsman E."

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On the spin modulated circular polarization from the intermediate polars NY Lup and IGR J15094-6649

Potter S.B.; Romero-Colmenero E.; Kotze M.; Zietsman E.; Butters O.W.; Pekeur N.; Buckley D.A.H. (2012)

We report on high-time-resolution, high-signal-to-noise ratio (S/N), photopolarimetry of the intermediate polars NY Lup and IGR J15094-6649. Our observations confirm the detection and colour dependence of circular polarization ...
Possible detection of two giant extrasolar planets orbiting the eclipsing polar UZ Fornacis

Potter S.B.; Romero-Colmenero E.; Ramsay G.; Crawford S.; Gulbis A.; Barway S.; Zietsman E.; Kotze M.; Buckley D.A.H.; O'Donoghue D.; Siegmund O.H.W.; McPhate J.; Welsh B.Y.; Vallerga J. (2011)

We present new high-speed, multi-observatory, multi-instrument photometry of the eclipsing polar UZ For in order to measure precise mid-eclipse times with the aim of detecting any orbital period variations. When combined ...
Time resolved astronomy with the SALT

Buckley D.A.H.; Crawford S.; Gulbis A.A.S.; McPhate J.; Nordsieck K.H.; Potter S.B.; O'Donoghue D.; Siegmund O.H.W.; Schellart P.; Spark M.; Welsh B.Y.; Zietsman E. (2010)

While time resolved astronomical observations are not new, the extension of such studies to sub-second time resolution is and has resulted in the opening of a new observational frontier, High Time Resolution Astronomy ...

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