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ePESSTO spectroscopic classification of optical transients

ATel #10334; R. Cartier, C. P. Gutierrez, M. Smith, C. Frohmaier, C. Inserra (Southampton), J. Lyman (Warwick), E. Kankare (QUB), K. Maguire (QUB), S. J. Smartt (QUB), K. W. Smith (QUB), M. Sullivan (Southampton), S. Valenti (UC Davis), O. Yaron (Weizmann), D. Young (QUB), I. Manulis (Weizmann), J. Tonry, B. Stalder, L. Denneau., A. Heinze, H. Weiland (IfA, Univ. of Hawaii), A. Rest (STScI), D. Wright (QUB), K. C. Chambers, H. Flewelling, M. Huber, T. Lowe. E. Magnier, A. Schulz, C. Waters, R. J. Wainscoat, M. Wilman (IfA, Univ. Hawaii)
on 30 Apr 2017; 18:29 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Mathew Smith (matsmith2@gmail.com)

Subjects: Optical, Supernovae

Referred to by ATel #: 10344, 10354, 10510

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 Pan-STARRS Survey for Transients (see Chambers et al. 2016, arXiv:1612.05560, and http://pswww.ifa.hawaii.edu ), 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 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 2017 April 29, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). The classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024). The 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  
ATLAS17ewl  | SN2017diz |10 34 20.11 | +13 45 04.2 | 20170405 | ATLAS   |   18.5    | 0.010 |  II   |           | 
PS17clh     | SN2017dhn |11 11 33.20 | +09 04 19.7 | 20170420 | PS1     |   20.4    | 0.074 |  II   |+11 to +20d| (1) 
PS17clt     | AT2017dhf |11 14 19.74 | +04 38 06.3 | 20170423 | PS1     |   19.8    |       |       |           | (2) 
ATLAS17evm  | SN2017dio |11 36 27.76 | +18 17 46.9 | 20170426 | ATLAS   |   18.3    | 0.037 |  Ic   |           | (3) 
PS17clu     | SN2017dhh |11 57 55.77 | -03 27 36.8 | 20170423 | PS1     |   20.4    | 0.137 |  Ia   |  at max   | 
ATLAS17exq  | SN2017djm |12 06 50.32 | -24 28 06.2 | 20170416 | ATLAS   |   18.7    | 0.050 |  Ia   |  at max   |  
PS17clc     | SN2017dhl |12 12 03.67 | +06 39 14.2 | 20170416 | PS1     |   20.2    | 0.137 |  Ia   | +8 to +10d| 
ATLAS17exo  | SN2017djl |12 52 20.38 | -15 57 37.3 | 20170420 | ATLAS   |   19.0    | 0.044 |  Ia   |  at max   |  
ATLAS17exn  | SN2017djn |12 57 25.95 | -17 51 48.7 | 20170420 | ATLAS   |   18.9    | 0.051 |  Ia   | -7 to -4d | (4) 
ATLAS17ezs  | SN2017dju |13 05 43.86 | -37 40 36.0 | 20170428 | ATLAS   |   18.6    | 0.051 |  Ia   | near max  | (5) 
ATLAS17eyv  | SN2017djg |13 11 33.07 | -19 09 22.8 | 20170428 | ATLAS   |   18.6    | 0.068 |  IIn  | +4 to +7d |   
            | AT2017dka |14 01 46.10 | +09 29 57.4 | 20170430 |         |   17.9    |       |       |           | (6) 
ATLAS17evp  | SN2017dir |14 02 09.77 | +22 52 20.4 | 20170426 | ATLAS   |   18.6    | 0.065 |  Ia   |+11 to +20d|  
PS17ciu     | AT2017ddl |16 23 20.80 | -13 44 24.1 | 20170404 | PS1     |   17.2    | 0.000 | Star  |           | 
ASASSN-17fp | AT2017djk |18 08 51.10 | -73 04 04.2 | 20170428 | ASAS-SN |   16.2    | 0.000 | Star  |           | (7) 
Gaia17bcm   | SN2017diw |01 36 15.07 | -65 10 29.7 | 20170403 | Gaia    |   18.9    | 0.070 |  Ia   |   >+20d   |  
ATLAS17etw  | AT2017dht |09 27 06.82 | +12 42 03.5 | 20170422 | ATLAS   |   18.8    | 0.090 |       |           | (8) 
 
(1) We acknowledge the contribution of Zooniverse Citizen Scientists 'yuvalszw', 'nilium' and 'Jose_Campos' 
(2) Blue featureless continuum, but the transient is close to galaxy and it is likely a SN. 
(3) SN Ic showing strong narrow Balmer lines including H delta and He I 5876 and 7065 narrow lines, evidence of CSM. 
(4) SN Ia before maximum with an asymmetric Si II 6355 line profile. 
(5) SN Ia similar to a 91bg-like. 
(6) Blue featureless continuum, the transient is located on the spiral arm of a galaxy at z~0.021 and it is likely a young SN. 
(7) MW stellar outburst, with HeI, but no H absorption at z=0.0. Potential AM CVn.  
(8) Faint galaxy emission lines place this object at z=0.09. Spectrum is a blue continuum. No definitive classification is possible.