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Fast photometry of quiescent soft X-ray transients with the Acquisition Camera on Gemini-South

Fast photometry of quiescent soft X-ray transients with the Acquisition Camera on Gemini-South

We present a compilation of high time-resolution photometric observations of quiescent soft X-ray transients obtained with the acquisition camera of Gemini-South. A0620-00 was observed with a short cycle time and high precision. Superimposed on the ellipsoidal modulation we find several prominent flares together with weaker continual variability. The flares seen …