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Fig. 16.


Daily observing time fraction for ASTEP South for the winters 2008, 2009, 2010, and 2011. The light blue and dark blue regions indicate the fraction of time with a Sun elevation lower than −9° and −13° (9° and 13° below the horizon), respectively. Periods of photometric and veiled weather as observed by ASTEP South are indicated in red and orange, respectively. Periods of bad weather including white-outs are indicated in white. Periods in yellow indicate that data were recorded but not used in the photometric analysis, either because they were taken during the instrument setup at the beginning of the winter or were lost during the data transfer.

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