AstroNote 2019-121

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2019-11-04 16:59:17
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: P. Charalampopoulos, D. B. Malesani, (DTU Space), L. Izzo, C. R. Angus (DARK/NBI), G. Leloudas (DTU Space), R. Cartier (CTIO), S. Prentice (TCD), M. Dennefeld (IAP), P. Pessi (IALP), J. Anderson (ESO), T. Muller Bravo (Southampton), T.-W. Chen (MPE), 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)
Source Group: ePESSTO+
This report includes classifications of 1 Type Ic-BL and 1 Type IIn. SN2019tpl presents a blue spectrum dominated by emission lines. The Balmer lines present are broader than the identifiable host galaxy emission lines at z=0.073, suggesting this event is a SN-IIn. We also identify helium and possibly silicon emission in the spectrum. We strongly encourage 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 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 November 3, 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
TNS2019tpl [ZTF19ackbclh]01:00:00.681-03:06:30.32SN IIn0.073SDSS J010000.83-030632.40.073ATLAS, ZTFAround maxSpectrum is blue, with broadened balmer line profiles typical of a SN-IIn. The spectrum also features many other emission lines (helium and possibly silicon).01:00:00.681-03:06:30.32SN IIn0.076
TNS2019tvk [ATLAS19znl]00:35:36.971-11:28:31.10SN Ic-BL0.0796ATLAS, ZTFAround max00:35:36.974-11:28:30.99SN Ic-BL0.0796