TITLE: GCN CIRCULAR NUMBER: 20814 SUBJECT: LIGO/Virgo G275404: Liverpool Telescope classification of EM candidates DATE: 17/03/04 19:25:27 GMT FROM: Chris Copperwheat at LJMU ArI C.M.Copperwheat (LJMU), I.A.Steele (LJMU) and A.S.Piascik (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), 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 report the following Liverpool Telescope follow-up observations of EM candidates originally reported in GCNs #20790 and #20801. Observations were made with the SPRAT spectrograph, and supernova classifications were obtained using SNID (Blondin & Tonry, 2007, ApJ, 666, 1024). iPTF17bug was observed on 2017-03-03 at 20:19UT. This is a nuclear source, and the spectrum we obtain seems to be dominated by the host galaxy. iPTF17bpa was observed on 2017-03-03 at 22:37UT. This source was reported to be off-centre from it's host galaxy but we do not detect a transient above the background galaxy emission in our acquisition image. The spectrum seems to be galaxy dominated. iPTF17bpt was observed on 2017-03-03 at 23:17UT. We classify this source as a type Ia Supernova with z=0.074. A type Ib classification is also a possibility. Note that this classification replaces the classification with erroneously high z reported in GCN #20809. iPTF17bsi was observed on 2017-03-04 at 04:56UT. SNID classifies this source as a Type II supernova (possibly IIP) at 2.7 days after peak with z=0.028. This is significantly higher than the photometric z = 0.014 reported for the host galaxy in GCN #20790. iPTF17btb was observed on 2017-03-04 at 05:29UT. We observe a bright point source with a featureless spectrum - this is likely a dwarf nova in outburst.