  Previous studies have found that Vega is surrounded by an extended debris
disc that is very smooth in the far infrared, but displays possible clumpiness
at 850micron and dust emission peaks at 1.3mm. We reobserved Vega at 1.3mm with
PdBI to constrain its circumstellar dust distribution. Our observations of a
three-field mosaic have a factor of two higher sensitivity than previous
observations. We detect Vega photosphere with the expected flux, but none of
the previously reported emission peaks that should have been detected at the
>6sigma level, with a sensitivity <1mK. This implies that the dust distribution
around Vega is principally smooth and circularly symmetric. This also means
that no planet is needed to account for dust trapped in mean-motion resonnance.
