TITLE: GCN CIRCULAR NUMBER: 18359 SUBJECT: LIGO/VIRGO G184098 : classifications of transients from the LSQ observations DATE: 15/09/23 12:03:39 GMT FROM: S. J. Smartt at Queens U Belfast K. Takats, C. Agliozzo (UNAB, MAS), A. Razza (DAS, MAS), F. Olivares (UNAB, MAS), I. Pessa (PUC, MAS), H. Campbell (IOA), N. Elias-Rosa, E. Cappellaro (INAF - OAPd), C. Inserra (QUB), K. Maguire (ESO), S. J. Smartt (QUB), K. W. Smith (QUB), M. Sullivan (Southampton), S. Valenti (LCOGT), O. Yaron (Weizmann), D. Young (QUB), Ilan Manulis (Weizmann), C. Baltay, N. Ellman, E. Hadjiyska, R. McKinnon, D. Rabinowitz, S. Rostami (Yale University), U. Feindt, M. Kowalski (Universitat Bonn), P. Nugent (LBL Berkeley) on behalf of PESSTO. Following the LSQ discovery (Rabinowitz et al, GCN 18347) of candidates in the G184098 southern error box, PESSTO, the Public ESO Spectroscopic Survey for Transient Objects (see Smartt et al. 2015, A&A, 579, 40 http://www.pessto.org), reports the following classifications. All observations were performed on the ESO New Technology Telescope at La Silla on the night of 2015-09-22, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024). Classification spectra can be obtained from http://www.pessto.org (via WISeREP). Name | RA (J2000) | Dec (J2000) | Disc. Date | Source | Disc Mag | z | Type | Phase | LSQ15bbb | 07:25:16.50 | -69:04:01.1 | 20150918 | LSQ | 17.36 | 0.037 | Ia | around max | LSQ15bbj | 07:16:14.45 | -69:36:00.2 | 20150918 | LSQ | 19.75 | 0.086 | Ia | +4-5d | The two transients are normal looking type Ia supernovae and almost certainly unrelated to the GW trigger.