AstroNote 2019-108

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2019-10-21 15:59:32
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: G. Leloudas, P. Charalampopoulos, D. B. Malesani (DTU Space), L. Izzo, C. R. Angus (DARK/NBI), T. Nagao (ESO), G. Pignata (UNAB/MAS), T. -W. Chen (MPE), J. Anderson (ESO), T. Muller Bravo (Southampton), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Birmingham), O. Yaron (Weizmann), D. Young (QUB), I. Manulis (Weizmann) , J. Tonry, L. Denneau, A. Heinze, H. Weiland, H. Flewelling (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), K. W. Smith, S. J. Smartt, O. McBrien, S. Srivastav (QUB), K. C. Chambers, T. de Boer, J. Bulger, J. Fairlamb, M. Huber, C.-C. Lin, T. Lowe, E. Magnier, A. Schultz, R. J. Wainscoat, M. Willman (IfA, Univ. Hawaii)
Source Group: ePESSTO+
This report includes classifications of 2 Type Ia's, 1 Type IIn, 1 Type IIb. We note that SN2019suf is an orphan SN-Ia without any apparent host environment. We also observed one nuclear transient, AT2019mto, whose classification remains uncertain. We encourage further follow-up observations.

ePESSTO+, the advanced Public ESO Spectroscopic Survey for Transient Objects (Smartt et al. 2015 2015A&A...579A..40S), reports the following supernova classifications.

Targets were supplied by the Pan-STARRS Survey for Transients (Chambers et al. 2016 2016arXiv161205560C), the ATLAS survey (Tonry et al. 2018 2018PASP..130f4505T), the Zwicky Transient Facility ZTF (Kulkarni 2018 2018ATel11266....1K) - data stream processed through the Lasair broker (Smith, Williams, Young et al. 2019 2019RNAAS...3a..26S), and the All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014 2014ApJ...788...48S).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2019 October 20, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B), Superfit (Howell et al. 2005 2005ApJ...634.1190H) and astroDASH (Muthukrishna et al. 2019 2019arXiv190302557M).

The classification spectra and additional details can be obtained from (via WISeREP) and the IAU Transient Name Server.

The classified objects are listed in the Related Objects table below.

Show current TNS values
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftSourcePhase (days)RemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2019ssi [ZTF19acftfav]23:30:56.131+15:29:29.87SN IIn0.013UGC 126400.013373ATLASpre-max23:30:56.130+15:29:29.98SN IIP0.013
TNS2019mto [ZTF19abhvryy]22:52:49.351-21:07:51.250.1422MASX J22524935-21075100.142ATLASSlow rising nuclear transient. Spectrum shows a blue continuum with broad balmer lines and narrow [OIII] emission.22:52:49.351-21:07:51.250.142
TNS2019sss [ASASSN-19zh]03:02:49.807-60:52:14.23SN Ia0.04WISEA J030250.18-605212.7ASASSN-6Redshift obtained from the SN.03:02:49.960-60:52:16.54SN Ia0.04
TNS2019sna [PS19gax]23:18:56.511-10:10:35.03SN IIb0.031WISEA J231856.48-101038.00.031162PS1Around max23:18:56.510-10:10:35.15SN II0.048
TNS2019suf [ATLAS19ykk]03:13:41.308+02:35:47.60SN Ia0.04ATLAS-3Redshift obtained from the SN. The SN appears hostless.03:13:41.308+02:35:47.60SN Ia0.04