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ePESSTO spectroscopic classification of optical transients

ATel #11516; D. Malesani (DAWN, DARK), A. Rubin (WIS), G. Leloudas (DARK), J. Anderson (ESO), K. Maguire (QUB), Z. Kostrzewa-Rutkowska (SRON/RU), C. Inserra (Southampton), E. Kankare, S. J. Smartt (QUB), O. Yaron (Weizmann), D. Young (QUB), J. Tonry, L. Denneau, A. Heinze, H. Weiland (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), K. W. Smith, O. McBrien (QUB), D. E. Wright (Univ. of Minnesota)
on 8 Apr 2018; 20:02 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Giorgos Leloudas (giorgos@dark-cosmology.dk)

Subjects: Optical, Supernovae, Transient

ePESSTO, the extended 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 ATLAS survey, see Tonry et al. (2011, PASP, 123, 58) and Tonry et al. (ATel #8680), and 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 ). All observations were performed on the ESO New Technology Telescope at La Silla on 2018 April 7 UT, 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 
ASASSN-18hb | SN 2018aqi | 10 48 25.36 | -25 09 35.82 | 2018 04 06 | ASAS-SN     | 16.4     | 0.012 | Ia     | -6       | (1) 
ATLAS18mmy  | SN 2018aqh | 12 05 26.66 |  20 17 56.8  | 2018 04 05 | ATLAS       | 16.7     | 0.024 | Ia     | -2       | (1)  
ASASSN-18gt | SN 2018apo | 12 45 05.30 | -44 00 23.10 | 2018 04 02 | ASAS-SN     | 16.0     | 0.018 | Ia-91T | -7       | (2) 
ASASSN-18hd | SN 2018aqj | 12 01 43.10 |  08 08 04.8  | 2018 04 06 | ASAS-SN     | 17.0     | 0.042 | Ia     | at max   |  
ASASSN-18gr | SN 2018apm | 11 31 23.74 | -37 36 08.6  | 2018 04 03 | ASAS-SN     | 17.5     | 0.03  | Ia     | at max   | (3) 
ATLAS18mms  | AT 2018ail | 13 04 20.97 |  01 09 03.3  | 2018 02 13 | ATLAS       | 19.3     | 0.061 | galaxy | -        |  
ASASSN-18hf | SN 2018aqn | 13 33 52.51 | -37 43 56.7  | 2018 04 07 | ASAS-SN     | 17.1     | 0.024 | IIn    | young    | (4) 

(1) Excellent match with several SNe Ia at phases between 1 week pre-max and maximum light. Given is the phase of the top match template in SNID.
(2) Matches young SNe Ia of the bright sub-types 91T and 99aa. Could be even at a phase as early as -11 days.
(3) The redshift for this SN is from template matching.
(4) Blue continuum and Balmer and He I lines in emission with narrow components.