AstroNote 2019-71

Primary tabs

2019-08-21 16:11:48
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: M. Fraser, S. Brennan (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), M. Gromadzki (Warsaw), 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), A. Pastorello (INAF-Padova)
Source Group: ePESSTO+
This report includes classifications of two Type Ia's, one Type Ia-91bg and two Type II's. SN2019nyk is infant Type II, showing flash features. SN2019nyn is Type IIn. Classification of AT2019nln is unclear. AT2019nog was not visible on 60s acquisition image.

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 ZTF (Kulkarni 2018 2018ATel11266....1K) - data stream processed through the Lasair broker (Smith, Williams, Young et al. 2019 2019RNAAS...3a..26S), 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 August 20, 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
TNS2019mic [ATLAS19qmy]01:13:45.490-21:43:28.60SN Ia0.09ATLAS1301:13:45.490-21:43:28.60SN Ia0.09
TNS2019nln [ZTF19abprcwo]21:55:37.116+05:23:30.53GalaxySDSS J215537.10+052330.70.198ZTFnoisy spectrum with emission line feature around 8475A21:55:37.116+05:23:30.53
TNS2019noh [ZTF19abpqvdh]23:05:40.758+27:39:57.53SN Ia-91bg-like0.024871UGC 123520.024871ZTF023:05:40.758+27:39:57.52SN Ia-91bg-like0.0249
TNS2019nwf [ZTF19abqlrtb]04:05:04.975-06:36:17.31SN Ia0.057ZTF-704:05:04.980-06:36:17.34SN Ia0.057
TNS2019nyk [ZTF19abqrhvt]00:15:15.205-08:11:21.84SN II0.021HIPASS J0015-08ZTFblue continuum superimposed by faint Balmer and HeII emission lines00:15:15.202-08:11:21.85SN II0.021048
TNS2019nyn [ASASSN-19tx]01:07:37.215-41:51:12.33SN IIn0.023947AM 0105-420 NED020.023947ASAS-SNblue continuum with narrow Balmer emission lines and broad emission of NIII+HeII.01:07:37.215-41:51:12.33SN II0.023947
TNS2019nog [ZTF19abptnap]23:41:01.498-12:23:56.32OtherLEDA 953369target was not visible on 60s acquisition image23:41:01.498-12:23:56.32