AstroNote 2019-72

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2019-08-22 14:00:11
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: S. Brennan, M. Fraser (Univ. Collage Dublin), N. Ihanec, M. Gromadzki (Warsaw), S. C. Williams (Lancaster), C. Gutierrez (Southampton), T. Wevers (Cambridge), J. Anderson (ESO), T. Muller Bravo (Southampton), T.-W. Chen (MPE), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Edinburgh), O. Yaron, I. Manulis (Weizmann), D. Young (QUB), 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)
Source Group: ePESSTO+
This report includes classifications of three Supernovea. SN2019nzx is Type Ia-91T-like, SN2019nyr is Type Ia and SN2019obh is Type IIb.

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 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). 

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2019 August 21, 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
TNS2019nzx [ATLAS19src]20:51:34.816-44:49:32.40SN Ia-91T-like0.065ATLAS-2redshift from SNID20:51:34.800-44:49:32.77SN Ia-91T-like0.065
TNS2019nyr [ATLAS19sqz]21:08:39.086-43:25:11.48SN Ia0.044277AM 2105-433ATLAS-121:08:39.070-43:25:11.10SN Ia0.044
TNS2019obh [ZTF19abqykei]04:36:22.242-10:22:19.94SN IIb0.03555MRK 0618ZTF004:36:22.244-10:22:20.04SN IIb0.0355