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ePESSTO spectroscopic classification of optical transients

ATel #11258; R. Cartier (CTIO), A. Razza (U. de Chile/ESO), P. Clark (QUB), O. McBrien (QUB), T.-W. Chen (MPE), M. Dennefeld (IAP and Sorbonne Universite), C. Inserra (Southampton), E. Kankare (QUB), K. Maguire (QUB), S. J. Smartt (QUB), M. Sullivan (Southampton), S. Valenti (UC Davis), O. Yaron (Weizmann), D. Young (QUB), I. Manulis (Weizmann), Z. Kostrzewa-Rutkowska (SRON/RU), G. Leloudas (DARK)
on 5 Feb 2018; 16:40 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Erkki Kankare (e.kankare@qub.ac.uk)

Subjects: Optical, Supernovae

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 are from 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 Feb 4, 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-18ba | SN2018jm | 05 08 12.00 | -54 38 43.40 |  20180120  | ASAS-SN |   18.1   | 0.064 |  Ia      | +11 to +20 | (1) 
ASASSN-18bm | SN2018lm | 10 32 04.88 | -36 37 29.47 |  20180128  | ASAS-SN |   17.5   | 0.045 |  Ia      | -3 to +3   | (2) 
ASASSN-18bp | AT2018ly | 08 46 44.80 | -13 49 00.84 |  20180129  | ASAS-SN |   16.5   | 0.0   |  Stellar |            | (3) 

(1) Redshift from SNID. Target located 0.8" from galaxy core.
(2) Redshift from SNID. Also observed by ATLAS as ATLAS18lsv. SN2018lm was observed as part of the GREAT survey (Chen et al. ATel #10510), having a black body temperature of T_BB ~ 24500+/-13300 K obtained from the photometry taken on 2018 February 4 with griz=17.42,17.59,18.31,18.51 mag using GROND zero points.
(3) Spectrum shows Balmer absorption lines at z = 0. Hostless transient to Pan-STARRS 3Pi survey depths, likely CV.