ePESSTO spectroscopic classification of optical transients

ATel #11909; R. Stein (Hu Berlin/DESY), F. Onori (SRON/RU), G. Cannizzaro (SRON/RU), N. Elias-Rosa (IEEC, ICE-CSIC), M. Gromadzki (Warsaw), C. Inserra (Southampton), E. Kankare (QUB), K. Maguire (QUB), S. J. Smartt (QUB), O. Yaron (Weizmann), D. R. Young (QUB), I. Manulis (Weizmann), J. Tonry, L. Denneau., A. Heinze, H. Weiland (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), K. W. Smith O. McBrien, D. E. Wright (Univ. of Minnesota)
on 4 Aug 2018; 15:56 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Francesca Onori (f.onori@sron.nl)

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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), 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 by 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 August 02, 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. Unless otherwise noted the redshift is from SN template matching.

 
Survey Name  | IAU Name  | RA (J2000)  | Dec (J2000) | Disc. Date | Source  | Disc Mag |  z      | Type | Phase    | Notes 
ATLAS18sfk   | SN2018dzh | 14 40 33.36 | +13 07 23.1 |  20180712  |  ATLAS  |   19.41  | 0.05    |  Ia  | +4 to +7 |  
ATLAS18skr   | SN2018ebq | 21 42 26.44 | +11 47 05.5 |  20180714  |  ATLAS  |   19.39  | 0.04    |  Ic  | >+20     |  
ATLAS18skw   | SN2018ebs | 21 39 37.62 | +08 56 39.7 |  20180716  |  ATLAS  |   19.59  | 0.03    |  Ia  | at max   |  
Gaia18bwu    | SN2018eem | 23 36 01.41 | +18 41 07.1 |  20180725  |  Gaia   |   18.79  | 0.05    |  II  | +4 to +7 |  
ASASSN-18qk  | AT2018emt | 22 10 35.65 | -27 14 58.6 |  20180801  |  ASASSN |   16.70  | 0.02395 |  ?   | -        | (1) 
ATLAS18svp   | SN2018emw | 21 22 55.27 | -18 11 00.3 |  20180801  |  ATLAS  |   18.56  | 0.03    |  II  | at max   |  
ATLAS18svz   | AT2018emz | 20 11 52.18 | +13 52 23.1 |  20180801  |  ATLAS  |   15.47  |  -      |  ?   | -        | (2) 
ASASSN-18qs  | SN2018enj | 20 05 41.09 | -47 58 41.3 |  20180802  |  ASASSN |   16.70  | 0.03    |  Ia  | +4 to +7 |  
ZTF18abjrfqx | SN2018elj | 22 08 23.36 | +11 22 45.4 |  20180726  |  ZTF    |   19.54  | 0.04    |  Ia  | at max   | (3) 
Gaia18byn    | SN2018enk | 00 25 51.82 | -20 40 50.3 |  20180710  |  Gaia   |   18.07  | 0.05    |  Ia  | at max   |  

(1) Blue featureless continuum, high S/N spectrum but no visible features. Blue starforming host. Further spectra will be taken, ATLAS photometry shows it at c=16.5.
(2) b=-10 degrees, close to Galactic Plane. Weak H-beta, delta and gamma in absorption at z=0, likely galactic CV. (3) Confirmed SN Ia classification by ZTF.