DRAFT
2021-05-12 16:00:01
Type: Object/s-Discovery/Classification
Bibcode: 2021TNSAN.152....1L
ePESSTO+ spectroscopic classification of optical transients
Authors: G. Leloudas, D. B. Malesani, P. Charalampopoulos, M. Pursiainen (DTU Space), G. Pignata (UNAB), S. Gonzalez-Gaitan (CENTRA), J. Teffs (Liverpool), S. Benetti (INAF Padova) J. Anderson (ESO), T. Müller Bravo (Southampton), T.-W. Chen (Stockholm), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Birmingham), O. Yaron (Weizmann), D. Young (QUB)
Source Group: ePESSTO+
Keywords: Transient, Supernova, Optical, Spectroscopy
Abstract:
This report includes classifications of two transients. AT2021lei is spectroscopically similar to type Ic/Ic-BL SNe, but the spectral features appear to be blueshifted based on the tentatively identified host galaxy redshift of z=0.112. ZTF21aauufbz was observed as a TDE candidate in a E+A galaxy. The spectrum is consistent with the galaxy, but as the host is 2.5 mag brighter than the transient, we cannot safely exclude contribution from transient features

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 Zwicky Transient Facility ZTF (Bellm et al. 2019 2019PASP..131a8002B) - data stream processed through the Lasair broker (Smith, Williams, Young et al. 2019 2019RNAAS...3a..26S) and by the ALeRCE broker (Forster et al. 2020 https://arxiv.org/abs/2008.03303).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2021 May 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 2021lei [ZTF21aayonfd] 12:06:20.968 +12:40:14.62 SN Ic 0.112 SDSS J120620.94+124013.9 0.112 ZTF At max Similar to Ic/Ic-BL SNe, but spectral features appear to be blueshifted. Redshift from narrow emission lines visible in the spectrum. 12:06:20.968 +12:40:14.62 SN Ic 0.112
Other 10:40:54.985 +24:44:49.16 Other 0.122 0.122 ZTF Known galaxy redshift. Spectrum consistent with the galaxy

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