ePESSTO spectroscopic classification of optical transients

ATel #12044; M. Gromadzki (Warsaw), T. Wevers (Cambridge), J. Lyman (Warwick), K. Maguire (QUB), S. Prentice (QUB), C. Inserra (Southampton), E. Kankare (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 (QUB), D. E. Wright (Univ. of Minnesota)
on 18 Sep 2018; 16:04 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Joe Lyman (j.d.lyman@warwick.ac.uk)

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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), the ESA Gaia Photometric Science Alerts Team and DPAC (http://gsaweb.ast.cam.ac.uk/alerts), Pan-STARRS Survey for Transients (see Chambers et al. 2016, arXiv:1612.05560, and http://pswww.ifa.hawaii.edu ) and the Zwicky Transient Factory (https://www.ztf.caltech.edu/). All observations were performed on the ESO New Technology Telescope at La Silla on 2018 September 17, 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 
 ATLAS18ujl   | SN2018fvb | 16:00:00.64 | -11:05:27.7 |  20180830  | ATLAS   |   18.5   | 0.051  | Ia      | +11 to +20 | (1) 
 ATLAS18uto   | SN2018fzw | 05:42:48.04 | -24:29:34.3 |  20180909  | ATLAS   |   18.1   | 0.046  | Ia      | -7 to -4   |  
 ATLAS18uxz   | AT2018gea | 00:56:20.69 | -09:35:00.1 |  20180819  | ATLAS   |   18.7   | 0.103  | -       | -          | (2) 
 ZTF18abtswjk | SN2018gfx | 02:33:11.51 | -01:18:20.2 |  20180908  | ZTF     |   19.0   | 0.051  | IIn     | -          | (3) 
 Gaia18cpm    | SN2018ghu | 05:41:46.00 | -11:42:37.2 |  20180911  | Gaia    |   19.0   | 0.084  | Ia-91T  | +11 to +20 |  
 ATLAS18vhr   | SN2018gju | 00:08:11.79 | -04:17:06.8 |  20180915  | ATLAS   |   19.3   | 0.05   | Ic-BL   | at max     | (4) 
 ATLAS18vhs   | AT2018gjv | 01:08:10.23 | +00:11:42.8 |  20180915  | ATLAS   |   19.0   | -      | -       | -          | (5) 
 PSP18C       | SN2018gjx | 02:16:15.55 | +28:35:28.7 |  20180915  | XOSS    |   16.9   | 0.012  | II      | young      | (6) 
 ZTF18abtgnxs | AT2018gkq | 01:55:22.03 | +06:36:42.3 |  20180904  | ZTF     |   19.8   | 0.017  | AGN     | -          | 
 ZTF18abtgnxs | AT2018gkq | 01:44:50.8  | -02:07:20.4 |  20180916  | ZTF     |   19.0   | 0.0    | Varstar | -          | (7) 
 ATLAS18vil   | SN2018gls | 02:52:02.11 | -17:03:56.0 |  20180916  | ATLAS   |   18.7   | 0.063  | Ia      | at max     |  
 ATLAS18vio   | SN2018glu | 15:14:11.16 | -14:20:58.8 |  20180917  | ATLAS   |   17.0   | 0.025  | Ia      | at max     |  
  

(1) Also good matched to Ia-91T templates at similar epochs.
(2) Spectrum taken under poor seeing. Only galaxy lines visible at z=0.103. 30 day plateau/slow-rise in ATLAS data, M_o = -19. Possible bright type II.
(3) Could be either IIn or AGN activity, still rising in ATLAS data. Coincident with core of 2MASX J02331152-0118198 (4) Matches to a range of at max and post max Ic-BL template spectra. Light curve was rising as of 20180917 and likely to be near max.
(5) Noisy blue continuum with no obvious features. Still rising in ATLAS data.
(6) Very blue continuum with narrow Balmer lines at z=0.012, He II 4686 also seen in emission. Young type II with flash-ionised lines, consistent with XOSS and ATLAS light curves.
(7) Coordinates given are updated with respect to the initial detection report.