PESSTO spectroscopic classification of optical transients
ATel #8119; H. Campbell (Cambridge), J. Lyman (Warwick), M. Fraser (Cambridge), J. Anderson (ESO), C. Inserra (QUB), I. Manulis (Weizmann), K. Maguire (QUB), S. J. Smartt (QUB), K. W. Smith (QUB), M. Sullivan (Southampton), S. Valenti (LCOGT), O. Yaron (Weizmann), D. Young (QUB), C. Baltay, N. Ellman, E. Hadjiyska, R. McKinnon, D. Rabinowitz, S. Rostami (Yale University), U. Feindt, M. Kowalski (Universitat Bonn), P. Nugent (LBL Berkeley), L. Wyrzykowski (Warsaw Observatory, Poland), D. Wright (QUB), K. Chambers, H. Flewelling, M. Huber, E. Magnier, J. Tonry, C. Waters, R. J. Wainscoat (IfA, Univ. Hawaii)
on 4 Oct 2015; 17:46 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Morgan Fraser (mf@ast.cam.ac.uk)
Subjects: Optical, Supernovae
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 supernova classifications. Targets were supplied by the La Silla-Quest survey (see Baltay et al., PASP, 2013, 125, 683), the OGLE-IV Real-time Transient Search (Wyrzykowski et al., 2014 arxiv:1409.1095; http://ogle.astrouw.edu.pl/ ) and the Pan-STARRS Survey for Transients (see Huber et al., ATel #7153). All observations were performed on the ESO New Technology Telescope at La Silla on 2015 Oct. 03, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) and GELATO (Harutyunyan et al., 2008, A&A, 488, 383). Classification spectra can be obtained from http://www.pessto.org (via WISeREP).
Name | RA (J2000) | Dec (J2000) | Disc. Date | Disc. Source | Disc Mag | z | Type | Phase | Notes
LSQ15bco | 23:15:11.83 | -33:15:15.1 | 2015-09-30 | LSQ | 18.7 | 0.04 | II | 0d | (1)
OGLE15gt | 23:50:09.22 | -69:09:55.6 | 2015-08-18 | OGLE | 19.7 | 0.11 | AGN | - | (2)
OGLE15ic | 01:10:17.68 | -69:55:25.8 | 2014-07-26 | OGLE | 19.4 | 0.15 | AGN | - | (3)
OGLE15jy | 06:00:44.62 | -72:38:30.3 | 2015-09-25 | OGLE | 19.9 | 0.06 | Ib/c? | ~max | (4)
OGLE15kk | 23:42:17.74 | -67:58:00.0 | 2015-09-22 | OGLE | 20.7 | 0.08 | Ia | ~max |
PS15cbm | 08:49:19.84 | +03:48:17.7 | 2015-09-17 | Pan-STARRS | 18.6 | 0.06 | Ia | +2-3w |
(1) Spectra are similar to a Type II SN a few days after explosion, with weak broad Balmer lines on a blue continuum.
(2) Coincident with host nucleus. Spectrum is that of an AGN, with narrow Balmer emission.
(3) Broad lined AGN, slow rise in lightcurve of ~1 mag over a year. Spectrum shows broad Halpha, Hbeta, [N II]
(4) Low S/N in classification spectrum. Best matches are to Type Ib/c and IIb SNe close to or just after maximum.