AstroNote 2019-113

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2019-10-26 17:50:44
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: P. Charalampopoulos, G. Leloudas (DTU Space), L. Izzo (DARK/NBI), D. B. Malesani (DTU Space), C. R. Angus (DARK/NBI), M. Fraser (Univ. College Dublin), L. Galbany (UGR), I. Mandel (Birmingham), J. Anderson (ESO), T. Muller Bravo (Southampton), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Birmingham), O. Yaron (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 1 Type Ia, 1 Type Ib and 2 Type Ic's. We reclassify SN2019jyn (previously reported as a Type Ib in TNS Classification Report No. 5032) as a late-time SN Ic at z=0.073. This event was targeted due to its unusual light curve evolution. We encourage further followup 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), and 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).


Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2019 May 25, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) and 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 (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
TNS2019teb [ATLAS19ysf]01:21:06.784-36:07:21.24SN Ib0.034ATLASpre-max01:21:06.784-36:07:21.24SN Ib0.032
TNS2019jyn [ATLAS19ode]22:30:20.322-14:52:04.25SN Ic0.073ATLAS>+20 daysReclassified due to unusual light curve evolution. After removing host galaxy features, good fits to SN Ic templates at z=0.07322:30:20.322-14:52:04.25SN Ic0.073
TNS2019taw [ZTF19acechlg]08:47:18.695-14:56:27.53SN Ia0.053ZTFpre-max08:47:18.697-14:56:27.46SN Ia0.056
TNS2019tdb [PS19gfw]01:42:51.820-06:08:50.80SN Ic0.02PS1Around max01:42:51.820-06:08:50.80SN Ic0.02