  We recently announced the detection of an unknown submillimeter source in our
ALMA observations of alpha Cen AB. The source was detected in two epochs, a
strong detection at 445~GHz and one at lower significance at 343.5~GHz. After
valuable feedback of the community, it turns out that the detection at
343.5~GHz could not be reproduced with a different reduction software nor with
fitting within the $(u,v)$-plane. The detection at 445~GHz has been further
confirmed with modeling of the $(u,v)$-data and was shown to be robust at
$>12\sigma$, confirming our detection of this unknown source. However, based on
only one epoch, further analysis and preferably new data are needed, before
publication of an article in which the nature of the new source can be
discussed. The analysis has indicated the importance of both $(u,v)$-plane
fitting and alternative data reduction when dealing with low signal to noise
source detections.
