AstroNote 2019-123

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2019-11-05 17:00:44
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: D. B. Malesani, (DTU Space), P. Charalampopoulos, C. R. Angus, L. Izzo (DARK/NBI), G. Leloudas (DTU Space), S. Prentice (TCD), M. Dennefeld (IAP), P. Pessi (IALP), R. Cartier (CTIO), C. Vogl, S. Taubenberger (MPA), D. Perley (LJMU), S. Schulze (Weizmann), 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), S. Wyatt (Arizona), D. Sand (Arizona), R. Amaro (Arizona), J. Andrews (Arizona), M. Lundquist (Arizona), S. Valenti (UC Davis), S. Yang (INAF-OAPd), D. E. Reichart, J. B. Haislip, V. Kouprianov (UNC)
Source Group: ePESSTO+
This report includes classifications of 2 Type Ia's, 1 Type Ib, 1 Type Ic, and 1 Type II. We confirm the classification of AT2019udc as a LBV at z=0.006, in agreement with ATel #13263. The spectrum of SN2019tuq resembles that of SN2013fs at z=0.053. 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), the Distance Less Than 40 Mpc supernova search (DLT40), and by the ESA Gaia Photometric Science Alerts Team DPAC.

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2019 November 4, 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
TNS2019udk [ZTF19acnzkph]00:40:51.290+02:50:25.67SN Ia0.017ZTFpre-max00:40:51.278+02:50:25.63SN Ia0.017892
TNS2019tyk [ATLAS19zss]01:22:18.331-22:20:41.68SN Ia0.136ATLAS+601:22:18.318-22:20:41.39SN Ia0.136
TNS2019tsf [ATLAS19zsy]11:08:32.800-10:28:54.44SN Ib0.03ATLAS, GAIAAround max11:08:32.800-10:28:54.44SN Ib0.03
TNS2019trw [PS19giw]00:18:37.718-02:42:32.68SN Ic0.2PS1pre-max00:18:37.718-02:42:32.68SN Ic0.2
TNS2019udc [ZTF19acoaiub]01:53:11.206+04:11:47.00LBV0.006NGC0718ATLAS, ZTF, DLT4001:53:11.203+04:11:47.00LBV0.006
TNS2019tuq [ZTF19acjwdnu]00:32:45.763-06:04:07.77SN II0.053ATLAS, ZTFAround maxSN redshift determined through template matching. SN shows a good likeness to SN2013fs. At this apparent redshift, the host galaxy is exceptionally faint (M=-14.7).00:32:45.766-06:04:07.70SN II0.17