TITLE: GCN CIRCULAR NUMBER: 18099 SUBJECT: GRB150724B: Retraction of the uvot detection DATE: 15/07/31 21:00:42 GMT FROM: Paul Kuin at MSSL Paul Kuin (MSSL/UCL) reports on behalf of the Swift/UVOT team: In GCN Circ.18075 we reported a detection in the first two white band images with the Swift UVOT. Further examination of the UVOT data showed that in the initial analysis the background region included part off the detector and gave a false reading. Correcting for that it is found that for the first two images there is just an upper limit of white > 22.00 mag at 88.7ks after the trigger. We apologise for the confusion this error may have caused.