AstroNote 2019-27

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2019-06-09 16:50:28
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: C. Frohmaier, E. Swann (ICG; Portsmouth), P. Short, M. Nicholl (Edinburgh), M. Dennefeld (IAP), S. C. Williams (Lancaster), P. Pessi (IALP), A. Pastorello (INAF), J. Anderson (ESO), T. Muller Bravo (Southampton), T.-W. Chen (MPE), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), O. Yaron (Weizmann), D. R. Young (QUB), I. Manulis (Weizmann), J. Tonry, L. Denneau, A. Heinze, H. Weiland (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), K.W. Smith, S. J. Smartt, O. McBrien, S. Srivastav (QUB)
Source Group: ePESSTO+
ePESSTO+, the advanced Public ESO Spectroscopic Survey for Transient Objects (see Smartt et al. 2015, A&A, 579, 40<> ), reports the following supernova classifications.
Targets were supplied by the ESA Gaia Photometric Science Alerts Team and DPAC (, by the Zwicky Transient Facility (; Kulkarni et al. 2018, ATel 11266) data stream processed through the Lasair broker (, by the ATLAS survey, see Tonry et al. (2018, PASP, 130,  064505), and the IAU TNS list (see 
All observations were performed on the ESO New Technology Telescope at La Silla on 2019 June 8, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024), GELATO (Harutyunyan et al., 2008,  A&A, 488, 383) and DASH (Muthukrishna et al. 2019, arXiv:1903.02557).
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 RedshiftSourceReported TypeReported RedshiftPhase (days)RemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2019hcc [Gaia19cdu]21:00:20.930-21:20:36.06SLSN-I0.044GaiaSLSN I0.044PreMax Spectrum shows blue continuum with host emission lines at z=0.0435. At this redshift, a w-shaped absorption feature in the blue matches the O II lines in young SLSNe. The absolute magnitude at discovery is -17.7, faint for that class unless it is a very early detection.21:00:20.930-21:20:36.06SLSN-I0.044
TNS2019fyt [ZTF19aavndxo]20:47:51.018+10:17:35.35AGN0.102ZTFAGN?0.102Blue continuum, narrow H and [O III] emission at z=0.102. Coincident with a faint SDSS galaxy.20:47:51.028+10:17:35.58AGN0.102
TNS2019gis [ATLAS19lzi]16:09:42.876-04:23:18.01SN Ia0.027ATLASIa0.027At max16:09:42.930-04:23:18.10SN Ia0.04
TNS2019gsg [ATLAS19mbn]21:45:50.733+15:06:33.10SN Ia0.112ATLASIa0.112+8 to +1021:45:50.761+15:06:32.75SN Ia0.112
TNS2019gqm [Gaia19bzw]19:48:09.560-24:26:36.60SN IIP0.02GaiaIIP0.02At max19:48:09.560-24:26:36.60SN II0.02
TNS2019gth [ZTF19aavyafo]15:52:31.264-15:19:47.21SN Ia0.01ZTFIa0.01At max15:52:31.256-15:19:47.14SN Ia0.1
TNS2019hbb [ZTF19aaycomi]23:25:13.041+09:27:11.41SN Ia0.03ZTFIa0.03At max23:25:13.050+09:27:11.27SN Ia0.03
TNS2019hat [ATLAS19mfw]13:23:05.925-42:20:31.48Other0ATLASUnclearNoisy spectrum showing some blue continuum, no clear classification.13:23:05.930-42:20:31.42
TNS2019gyy [ATLAS19mee]17:16:39.994+11:28:45.78Varstar0ATLASStellar0.0Blue continuum with Balmer absorption at z=0, likely CV.17:16:39.994+11:28:45.78CV
TNS2019gyx [ATLAS19mec]23:56:30.563-03:06:08.48SN Ib0.02ATLASIb0.02+4 to +723:56:30.595-03:06:08.51SN Ib0.02
TNS2019gwa [ZTF19aaxffum]15:58:41.191+11:14:25.02SN Ia-91T-like0.054ZTFIa-91T0.054-715:58:41.190+11:14:25.04SN Ia-91T-like0.054988
TNS2019gvp [ATLAS19mco]16:46:35.521-31:35:31.28SN Ib0.015ATLASIb0.015+7Also classified by Do et al. (TNS Report No. 4237). 16:46:35.521-31:35:31.28SN Ib0.015
TNS2019gvn [ BraTS-SON-T2-006]19:49:06.810+10:06:58.70Varstar0BraTSStellar0.0Blue continuum with Balmer absorption at z=0, likely CV. Also classified by Ochner and Pastorello (ATEL #12854).19:49:06.770+10:06:58.35CV
TNS2019gsp [ATLAS19mce]22:10:04.254+23:28:38.27Other0ATLASUnclearBlue continuum, no clear features to determine a redshift22:10:04.244+23:28:38.50