AstroNote 2019-9

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2019-05-03 17:41:31
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: M. Nicholl, P. Short (Edinburgh), E. Swann (Portsmouth), M. Smith, C. R. Angus, C. Gutierrez (Southampton), H. Kuncarayakti (Turku), L. Galbany (Pittsburgh), J. Anderson (ESO), T.-W. Chen (MPE), C. Inserra (Cardiff), O. Yaron, I. Manulis (Weizmann), D. R. Young, K. W. Smith, S. J. Smartt, O. McBrien, S. Srivastav (QUB), J. Tonry, L. Denneau., A. Heinze, H. Weiland (IfA, Univ. of Hawaii), B. Stalder (LSST) A. Rest (STScI)
Source Group: ePESSTO+

ePESSTO+, the extended 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 ATLAS survey (Tonry et al. 2018 2018PASP..130f4505T), the Zwicky Transient Facility (Kulkarni 2018 2018ATel11266....1K) - processed through the Lasair broker (Smith, Williams, Young et al. 2019 2019RNAAS...3a..26S) and the All Sky Automated Survey for SuperNovae ASAS-SN (Shappee et al. 2014 2014ApJ...788...48S).

All observations reported here were performed between 2019 April 30 to May 3rd (UT), on the ESO New Technology Telescope (NTT) at La Silla using EFOSC2 and Grism 11 and 13 (3380-7520, 3985-9315A, 18A resolution). Classifications were done with SNID (Blondin & Tonry 2007 2007ApJ...666.1024B), GELATO (Harutyunyan et al. 2008 2008A&A...488..383H) and Superfit (Howell et al. 2005 2005ApJ...634.1190H).

The classification spectra and additional details can be obtained from WISeREP (also via 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 RedshiftPhaseRemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2019ecx [ATLAS19hzw]09:16:42.030+18:57:54.11~max09:16:42.030+18:57:54.11SN Ia-91bg-like0.029
TNS2019dwz [ATLAS19htl]15:54:41.297-30:38:49.96~max15:54:41.297-30:38:49.96SN Ia0.05
TNS2019cqc [ZTF19aamrais]18:21:43.041+30:59:33.43~maxSpectrum exhibits a blue continuum with broad, shallow absorption features consistent with OII. Redshift derived from host galaxy emission lines.18:21:43.041+30:59:33.43SLSN-II0.1173
TNS2019dyt [ATLAS19hvy]14:24:48.601+02:39:06.32~maxSpectrum exhibits an excess of calcium emission in the nIR. Classification matches that of TNS Classification Report No. 3961.14:24:48.601+02:39:06.32SN Ia0.054
TNS2019ejj [ATLAS19igh]08:07:08.763-28:03:11.82pre-maxRedshift from galaxy emission / absorption lines. Spectrum is well matched to 2005cs at 2 days prior to maximum light.08:07:08.763-28:03:11.82SN II0.003
TNS2019egf [ZTF19aatazmc]11:05:36.134-11:52:48.50Redshift from galaxy emission / absorption lines. Spectrum is dominated by galaxy light. No evidence of the transient is seen in the extracted 1D spectrum.11:05:36.134-11:52:48.500.079
TNS2019eim [ASASSN-19ln]23:49:42.938-69:42:02.38-7 to -4 d23:49:42.938-69:42:02.38SN Ia0.039
TNS2019edm [ASASSN-19kw]23:47:45.386-27:29:08.95+11 to +20 dRedshift from galaxy emission / absorption lines. Also discovered by the Gaia survey as Gaia19boh.23:47:45.386-27:29:08.95SN Ia0.028