PESSTO spectroscopic classification of optical transients
ATel #4895; Matt Nicholl (Queen's University Belfast), Lukasz Wyrzykowski, Nadia Blagorodnova (IoA, Cambridge), Joe Polshaw, Cosimo Inserra, Morgan Fraser (Queen's University Belfast), S. Benetti, A. Pastorello, (INAF - Padova Astronomical Observatory), S. Valenti (LCOGT/UCSB), S. Taubenberger (MPA Garching), S. J. Smartt, K. Smith, D. Young (Queen's University Belfast), M. Sullivan (University of Southampton), A. Gal-Yam, O. Yaron (Weizmann Institute for Science).
on 18 Mar 2013; 15:04 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Cosimo Inserra (firstname.lastname@example.org)
Subjects: Optical, Supernovae
PESSTO, the Public ESO Spectroscopic Survey for Transient Objects (see
Valenti et al., ATel #4037; http://www.pessto.org ), reports the
following supernova classifications. Targets were supplied by the Transient Objects Confirmation Page (http://www.cbat.eps.harvard.edu/unconf/tocp.html)
and the OGLE-IV Transient Search (see Wyrzykowski et al., ATEL #4495).
All observations were performed on the ESO
New Technology Telescope at La Silla on 2013 March 17, 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
PSNJ01584182-6420485 | 01:58:41.82 | -64:20:48.4 | 20130215 | TOCP | 15.9 | 0.006 | IIP | ~3 weeks | (1)
PSNJ11240925-1219390 | 11:24:09.25 | -12:19:39.0 | 20130213 | TOCP | 18.5 | 0.065 | II | young | (2)
OGLE-2013-SN-019 | 02:27:33.91 | -75:08:16.0 | 20130224 | OGLE | 19.4 | 0.079 | IIP | few weeks | (3)
(1) A good match with several Type IIP, at least 3 weeks after maximum light.
(2) H-alpha and H-beta is seen in emission at z=0.065 at ~3000km/s, on a blue continuum, indicating that this is a young Type II supernova. The absolute magnitude at this redshift is -18.7, thus brighter than a normal Type IIP SN; while the measured velocities are lower than typical.
(3) Re-classification of OGLE-2013-SN-019 (ATel #4876). A reddened type IIP supernova a few weeks after maximum light.