DRAFT
2019-10-28 17:18:27
Type: Object/s-Discovery/Classification
Bibcode: 2019TNSAN.116....1C
ePESSTO+ spectroscopic classification of optical transients
Authors: P. Charalampopoulos, G. Leloudas, (DTU Space), L. Izzo, C. R. Angus (DARK/NBI), D. B. Malesani (DTU Space), I. Mandel (Birmingham), M. Fraser (Univ. College Dublin), L. Galbany (UGR), 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), 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+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of 2 Type Ia's (one 91T-like), 2 Type IIn’s, 1 Dwarf Nova and 2 unclassified nuclear transients. ZTF19achewzu and AT2019ths are nuclear transients whose spectra are consistent with galaxies at z=0.1 and z=0.071 respectively. We do not see any clear transient signatures within the spectra. We 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 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 27, 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 http://www.pessto.org (via WISeREP) and the IAU Transient Name Server.

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

Show current TNS values
Catalog Name Reported RA Reported DEC Reported Obj-Type Reported Redshift Host Name Host Redshift Source Phase (days) Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
Other 00:07:14.540 +04:13:14.43 Galaxy 0.1 ZTF Unclassified nuclear transient. Spectrum consistent with a galaxy at z~0.1
TNS 2019tkn [ZTF19achetvw] 00:25:42.040 +08:38:08.56 SN Ia 0.043 ZTF pre-max 00:25:42.053 +08:38:08.36 SN Ia 0.043
TNS 2019ths [ATLAS19ytu] 00:28:01.334 -04:33:16.80 SN IIn 0.166 0.166 ATLAS, PS1 Around max? Phase unclear from early limits 00:28:01.331 -04:33:16.78 SN IIn 0.166
TNS 2019tkd [ZTF19aciiuta] 00:22:45.154 -20:04:08.72 Galaxy 0.071 WISEA J002245.12-200406.5 ZTF Unclassified nuclear transient. Spectrum consistent with galaxy at z=0.071 00:22:45.154 -20:04:08.72 Galaxy 0.071
TNS 2019pdi [ATLAS19unl] 02:18:26.237 -00:33:05.46 SN IIn 0.1 PS1, ATLAS, ZTF Near max Slow rising transient. H-alpha profile consistent with SN at z=0.1 02:18:26.237 -00:33:05.46 SN IIn 0.1
TNS 2019tjm [ASASSN-19zw] 01:16:45.307 -28:33:39.92 SN Ia-91T-like 0.037 AM 0114-284 NED03 0.036655 ASASSN -2 Redshift from host galaxy absorption features 01:16:45.210 -28:33:39.85 SN Ia-91T-like 0.037
TNS 2019tkh [ASASSN-19zx] 05:46:20.782 -73:22:15.02 CV LMC 05:46:20.920 -73:22:15.00 CV

Comments