SOAR spectroscopic classification of optical transients

ATel #11816; R. Cartier (CTIO), C. Corco (CTIO), C. Inserra (Southampton), E. Kankare (QUB), K. Maguire (QUB), S. J. Smartt (QUB), O. Yaron (Weizmann), D. R. 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), D. E. Wright (Univ. of Minnesota), K. C. Chambers, H. Flewelling, M. Huber, T. Lowe, E. Magnier, A. Schultz, C. Waters, R. J. Wainscoat, M. Willman (IfA, Univ. of Hawaii)
on 4 Jul 2018; 19:52 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Regis Cartier (rgcartier@gmail.com)

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We report the following supernova classifications. The targets were supplied by supplied by Pan-STARRS Survey for Transients (see Chambers et al. 2016, arXiv:1612.05560, and http://pswww.ifa.hawaii.edu ), the ATLAS survey, see Tonry et al. (2011, PASP, 123, 58) and Tonry et al. (ATel #8680), 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 Backyard Observatory Supernova Search (BOSS; http://bosssupernova.com/ ). The observations were performed on the night of 2018-06-28 UT at the 4.1m SOAR Telescope equipped with the Goodman High Throughput Spectrograph using the 400 lines/mm grating, and a slit width of 1.0 arc second, resulting in a spectral coverage from 406 nm to 820 nm with a resolution of 0.636 nm. The classifications were done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Survey Name | IAU Name  | RA (J2000)  | Dec (J2000) | Disc. Date | Source  | Disc Mag |  z    | Type | Phase        | Notes 
PS18xf      | SN2018cjw | 17:46:41.41 | +27:35:22.9 | 2018-06-08 | PS1     | 20.42    | 0.094 | Ia   |  > +20 d     | (1)      
ATLAS18rrp  | SN2018coq | 22:55:06.10 | +11:15:28.3 | 2018-05-28 | ATLAS   | 18.71    | 0.025 | II   | +4 to +7 d   | (1) 
ASASSN-18my | SN2018cov | 23:49:48.24 | -14:07:09.9 | 2018-06-12 | ASAS-SN | 17.40    | 0.051 | Ia   | +11 to +20 d | (2) 
ATLAS18qss  | SN2018coy | 20:20:28.87 | -33:23:36.9 | 2018-06-10 | ATLAS   | 17.72    | 0.039 | Ia   | +4 to +7 d   | (1) 
ATLAS18qxw  | SN2018cqv | 23:18:28.70 | -25:59:25.3 | 2018-06-16 | ATLAS   | 19.07    | 0.103 | Ia   | +4 to +7 d   | 
ASASSN-18nr | SN2018ctb | 22:01:08.35 | +20:03:05.2 | 2018-06-19 | ASAS-SN | 16.50    | 0.029 | Ia   | > +20        | (2)  
            | SN2018ctw | 01:57:57.67 | -38:01:14.8 | 2018-06-21 | BOSS    | 17.40    | 0.037 | Ib   | < -10        | (1,3) 
ATLAS18rmn  | AT2018cuc | 22:05:21.37 | -28:29:43.8 | 2018-06-16 | ATLAS   | 19.79    | 0.849 | QSO  |              | (4) 
ASASSN-18nx | SN2018cvk | 19:55:31.95 | -49:53:11.2 | 2018-06-23 | ASAS-SN | 17.87    | 0.024 | IIn  |  young       | (1,5) 
ASASSN-18oa | SN2018cvn | 01:30:27.12 | -26:47:06.7 | 2018-06-22 | ASAS-SN | 16.70    | 0.019 | IIn  | < -10  d     | (1,6) 

 
(1) Redshift obtained from host galaxy emission lines. 
(2) Redshift from NED. 
(3) Similar to SN2005bf. 
(4) The spectrum shows blue continuum and a broad emission line that we identified as Mg II 2795, 2802. 
(5) The spectrum shows blue continuum, strong and broad Balmer lines, and broad lines of He I (5875.6, 6678 and 7065).  
(6) Best match to SN1998S at -13 d. The spectrum shows very blue continuum, weak broad Balmer lines and strong blended C III and N III lines at ~465 nm.