DRAFT
2021-03-06 17:38:08
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: J. Silvestre, S. González-Gaitán (LIsbon), S. Moran, T. Reynolds, H. Kuncarayakti (Turku), T.-W. Chen (Stockholm), L. Galbany (Barcelona), S. Srivastav (QUB), S. Benetti (INAF), J. Sollerman (Stockholm), J. Anderson (ESO), T. Müller Bravo (Southampton), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Birmingham), I. Irani, O. Yaron (Weizmann), D. Young (QUB), I. Manulis (Weizmann)
Source Group: ePESSTO+
Abstract:
This report includes the classification of AT 2021bxg as a Type IIn SN.

ePESSTO+, the advanced Public ESO Spectroscopic Survey for Transient Objects (Smartt et al. 2015 2015A&A...579A..40S), reports the following supernova classification.

The target was 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). The target was reported by the ZTF SLSN Science Program as a candidate SLSN (see Astronote 2021-80).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2020 March 05, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution).

The low signal-to-noise spectrum shows narrow H lines at z=0.09, imposed on a blue continuum. At this redshift, the transient currently has an absolute magnitude in r band of around -19 mag, after a 50 day rise.

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 2021bxq [ZTF21aafmkjk] 14:31:38.037 +06:10:44.67 SN IIn 0.09 SDSS J143137.87+061043.0 0.093 ZTF Redshift from narrow balmer lines, consistent with host photo-z = 0.093. 14:31:38.039 +06:10:44.71 SN IIn 0.09

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