TITLE: GCN CIRCULAR NUMBER: 21755 SUBJECT: LIGO/Virgo G299232: Liverpool Telescope observations DATE: 17/08/29 20:27:45 GMT FROM: Chris Copperwheat at LJMU ArI C.M.Copperwheat (LJMU) and I.A.Steele (LJMU) report on behalf of D.Bersier (LJMU), M.Bode (LJMU), C.Collins (LJMU), M.Darnley (LJMU), D.Galloway (Monash), A.Gomboc (Nova Gorica), S.Kobayashi (LJMU), A. Levan (Warwick), P.Mazzali (LJMU), C.Mundell (Bath), D.Perley (LJMU), E.Pian (Pisa), A.S. Piascik (LJMU), D. Pollacco (Warwick), D. Steeghs (Warwick), N.Tanvir (Leicester), K. Ulaczyk (Warwick), K.Wiersema (Leicester) and the GROWTH (Global Relay of Observatories Watching Transients Happen) collaboration. --- We observed MASTER OTJ033744.97+723159.0, originally reported in GCN #21720, on 2017-08-29 at 04:05UT using the SPRAT spectrograph on the Liverpool Telescope. We concur with the classification reported in GCN #21737: using SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) with the redshift of NGC1343 we believe this transient to be a supernova Type IIb at 2 days before maximum. We also observed the field of the optical transient discovered with Swift/UVOT (GCN #21733) in ugriz with the IO:O imager on the Liverpool Telescope, starting at 03:31UT on 2017-08-29. We do not detect an object at these coordinates, as has already been reported by a number of different groups. Our magnitude limits are comparable to those obtained with the Asiago 1.82 m Copernico Telescope (GCN #21745). ________________________________ Important Notice: the information in this email and any attachments is for the sole use of the intended recipient(s). If you are not an intended recipient, or a person responsible for delivering it to an intended recipient, you should delete it from your system immediately without disclosing its contents elsewhere and advise the sender by returning the email or by telephoning a number contained in the body of the email. No responsibility is accepted for loss or damage arising from viruses or changes made to this message after it was sent. The views contained in this email are those of the author and not necessarily those of Liverpool John Moores University.