PESSTO spectroscopic classification of optical transients

ATel #9358; T. Reynolds (Turku), M. Fraser (IoA, Cambridge), S. Mattila (Turku), T.-W. Chen (MPE), J. Anderson (ESO), C. Inserra (QUB), E. Kankare (QUB), K. Maguire (QUB), I. Manulis (Weizmann), S. J. Smartt (QUB), K. W. Smith (QUB), M. Sullivan (Southampton), S. Valenti (UC Davis), O. Yaron (Weizmann), D. Young (QUB), J. Tonry, B. Stalder, L. Denneau., A. Heinze, A. Sherstyuk (IfA, Univ. of Hawaii), A. Rest (STScI), D. Wright (QUB), K. Chambers, H. Flewelling, M. Huber, E. Magnier, J. Tonry, C. Waters, R. J. Wainscoat (IfA, Univ. Hawaii).
on 9 Aug 2016; 22:49 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Morgan Fraser (mf@ast.cam.ac.uk)

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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 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 ); Gaia; the Pan-STARRS Survey for Transients (see Huber et al., ATel #7153); and the ATLAS survey, see Tonry et al. (2011, PASP, 123, 58) and Tonry et al. (ATel #8680)". We acknowledge ESA Gaia, DPAC and the Photometric Science Alerts Team (http://gsaweb.ast.cam.ac.uk/alerts). All observations were performed on the ESO New Technology Telescope at La Silla on 2016 August 8, 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 and additional details can be obtained from http://www.pessto.org (via WISeREP) and the IAU Transient Name Server.

 
Survey Name | IAU Name  | RA (J2000)  | Dec (J2000) | Disc. Date | Source  | Disc Mag |  z    | Type | Phase | Notes 
Gaia16axu   | AT2016eqg | 18:19:02.89 | +09:55:42.7 | 2016-08-02 | Gaia    | 17.9     | -     | CV   | -     | (1) 
Gaia16ayc   | AT2016esk | 16:45:10.09 | -34:53:59.2 | 2016-08-03 | Gaia    | 16.3     | -     | -    | -     | (2) 
Gaia16axp   |           | 17:31:28.00 | -18:08:10.2 | 2016-07-31 | Gaia    | 18.0     | -     | CV   | -     | (3) 
ATLAS16bxt  | AT2016enm | 17:09:04.98 | -17:36:21.7 | 2016-08-01 | ATLAS   | 16.9     | -     | CV   | -     | (4) 
ATLAS16bwv  | SN2016eny | 16:33:08.35 | -15:33:32.4 | 2016-08-01 | ATLAS   | 17.8     | 0.03  | Ia   | +7d   | 
PS16drf     | SN2016etf | 22:04:03.13 | -10:13:05.5 | 2016-08-03 | PSST    | 19.4     | 0.057 | Ia   | -8d?  | (5) 
ATLAS16bwz  | AT2016enl | 22:03:34.71 | -24:58:50.8 | 2016-08-01 | ATLAS   | 18.7     | ?     | ?    | ?     | (6) 
PS16dqz     | AT2016euf | 19:26:53.12 | -25:56:05.3 | 2016-08-03 | PSST    | 20.1     | ?     | ?    | ?     | (7) 

(1) Blue continuum, with Hbeta a higher Balmer lines at z=0.
(2) Nothing visible on acquisition image.
(3) Blue continuum, narrow Halpha emission at z=0.
(4) Balmer absorption on blue continuum.
(5) The SN is within the central 1" of its host galaxy, and the spectrum is contaminated by galaxy light, making determining precise phase of SN difficult.
(6) Spectrum is blue and featureless. There are some possible weak bumps in the blue, which may indicate this is a SN. In reference images, there is a candidate faint blue host close to the position.
(7) Blue continuum, with an apparent break in the spectrum at ~6500 Ang. There is a possible emission feature at 4040 Ang, if this is MgII then the redshift of the transient is ~0.44.