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ePESSTO spectroscopic classification of optical transients

ATel #11524; D. Malesani (DAWN, DARK), A. Rubin (WIS), G. Leloudas (DARK), K. E. Heintz (Univ. Iceland, DAWN), M. Dennefeld (IAP/Sorbonne University), L. Galbany (Pittsburgh), S. Benetti (INAF-OAPd), S. Taubenberger (ESO), C. Inserra (Southampton), E. Kankare, K. Maguire, S. J. Smartt (QUB), O. Yaron (Weizmann), D. Young (QUB)
on 10 Apr 2018; 18:22 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Giorgos Leloudas (giorgos@dark-cosmology.dk)

Subjects: Optical, Supernovae, Transient

Referred to by ATel #: 11530

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 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 from the ESA Gaia Photometric Science Alerts Team and DPAC (http://gsaweb.ast.cam.ac.uk/alerts). All observations were performed on the ESO New Technology Telescope at La Silla on 2018 April 9 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-18gu | SN 2018aqa | 09 12 20.18 |  13 40 22.12 | 2018 04 04 | ASAS-SN     | 16.5     | 0.028 | Ia     | +4 to +7 | (1) 
ASASSN-18gw | AT 2018aqd | 08 30 31.04 | -67 14 55.14 | 2018 04 04 | ASAS-SN     | 16.3     | -     | -      | -        | (2) 
Gaia18avd   | AT 2018aqr | 09 14 23.29 | -07 10 27.73 | 2018 04 02 | Gaia        | 18.6     | 0.054 | Ia     | >20      |  
Gaia18aus   | AT 2018aps | 09 58 03.24 | -29 35 40.42 | 2018 04 01 | Gaia        | 17.7     | -     | -      | -        | (3) 

(1) This object has relatively narrow, low-velocity lines. Both SNID and GELATO provide a best match with SN 2006gz. It is therefore a candidate super-Chandra event but normal SNe Ia templates also provide good matches.
(2) Blue continuum.
(3) Low S/N spectrum showing a blue continuum.