GCN Circular 18359
Subject
LIGO/VIRGO G184098 : classifications of transients from the LSQ observations
Date
2015-09-23T12:03:39Z (10 years ago)
From
S. J. Smartt at Queens U Belfast <s.smartt@qub.ac.uk>
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.