TITLE: GCN CIRCULAR NUMBER: 21691 SUBJECT: LIGO/Virgo G298936: Liverpool Telescope Spectoscopy of GWFUNC-17ure DATE: 17/08/25 13:29:12 GMT FROM: Iain Steele at Liverpool/JMU I. A. Steele, C.M. Copperwheat, A.S. Piascik (Liverpool JMU) 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), E.Pian (Pisa), 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 obtained a spectrum using the SPRAT spectrograph of the Liverpool Telescope, La Palma on 2017-08-25 at 05:25UT of the CNEOST detected transient GWFUNC17-ure (Xu et al, GCN 21675). Using SNID we classify the source as a Type Ia supernova at redshift z=0.04 and age +18 days. Assuming z=0.04, the Si ejecta velocity is ~10,000 km/s. DisclaimerNone -- iain Steele Sent with Airmail