DRAFT
2021-12-12 19:20:17
Type: Object/s-Discovery/Classification
Bibcode: 2021TNSAN.315....1D
ePESSTO+ spectroscopic classification of optical transients
Authors: G. Dimitriadis (TCD), R. Cartier (Gemini), P. Wiseman (Southampton), D. O’Neill, M. Fulton (QUB), S. Benetti (INAF), J. Anderson (ESO), T.-W. Chen (Stockholm), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), T. Müller Bravo (ICE), M. Nicholl (Birmingham), O. Yaron (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, J. Gillanders, O. McBrien, S. Srivastav, and D. R. Young (QUB)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of three Type Ia's, two Type II's. We encourage follow-up 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 (Smith et al. 2020 2020arXiv200309052S), the All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014 2014ApJ...788...48S), the ESA Gaia Photometric Science Alerts Team DPAC, and taken from the IAU TNS list (see https://wis-tns.weizmann.ac.il/).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2021 December 11, 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).

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
TNS 2021agbz [ATLAS21bncr] 23:21:33.710 -43:13:50.60 SN Ia 0.044 at max Redshift computed from spectral template fitting. 23:21:33.710 -43:13:50.77 SN Ia 0.044
TNS 2021aefs [Gaia21fch] 11:43:29.690 -16:47:49.99 SN II 0.012 0.012 > +20 Redshift from strong host galaxy emission lines.The SN spectrum is highly contaminated by host galaxy emission. 11:43:29.690 -16:47:49.99 SN IIn 0.012255
TNS 2021agce [ATLAS21bndg] 09:46:28.832 -41:29:39.58 SN Ia 0.018 0.018 at max Redshift from host galaxy emission lines. The SN spectrum suffers from significant reddening. 09:46:28.832 -41:29:39.58 SN Ia 0.018
TNS 2021agdk [ASASSN-21vw] 06:01:20.844 -76:53:11.33 SN Ia 0.016 WISEA J060120.41-765313.5 0.016 -7 Redshift from host galaxy Halpha emission line. 06:01:20.844 -76:53:11.33 SN Ia 0.016
TNS 2021agdm [MSOSSP_07] 09:19:49.500 -68:54:32.90 SN II 0.0114 ESO 61-8 0.011405 Redshift from NED. 09:19:49.520 -68:54:32.87 SN II 0.0114

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