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PESSTO spectroscopic classification of optical transients

ATel #8727; N. Elias-Rosa (INAF - Padova), M. Kromer (Stockholm University), T. Faran, S. Taubenberger (ESO), J. Lyman (Warwick), Kate Maguire (QUB), M. Dennefeld (IAP, UPMC), C. Inserra, E. Kankare, S. J. Smartt, K. W. Smith (QUB), M. Sullivan (Southampton), S. Valenti (UC Davis), O. Yaron (Weizmann), D. Young (QUB), I. Manulis (Weizmann)
on 24 Feb 2016; 16:14 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: N. Elias-Rosa (nancy.elias@oapd.inaf.it)

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 TAROT Collaboration (http://tarot.obs-hp.fr/), the All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014, ApJ, 788, 48 and http://www.astronomy.ohio-state.edu/~assassin/index.shtml ), and ESA Gaia, DPAC and the Photometric Science Alerts Team (http://gsaweb.ast.cam.ac.uk/alertsc). All observations were performed on the ESO New Technology Telescope at La Silla on 2016 February 23rd, 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) and the Transient Name Server.

 
 Name     | RA (J2000)  | Dec (J2000) | Disc. Date | Disc. Source | Disc Mag | z     | Type   | Phase                | Notes
SN2016ajm | 02 49 36.01 | -31 13 23.9 | 2016-02-20 | TAROT | 16.9 | 0.024 | SNIa-p | ~ 1 week after max | a Gaia16afj | 06 46 41.29 | -45 07 04.5 | 2016-02-22 | Gaia | 18.4 | 0.055 | SNIa | ~ 1 week before max | SN2016aiy | 13 08 25.39 | -41 58 50.3 | 2016-02-17 | ASAS-SN | 16.6 | 0.010 | SNIIn | <10d from explosion | b

a. Possibly 91bg-like SN Ia. A good match is found with SN 1999by ~ 1 week after maximum light.
b. Discovered originally as ASASSN-16bw. Blue continuum spectrum, showing narrow Balmer and He I emission lines. The phase is set according to the photometric information provided in the discovery ATel (#8703).