DRAFT
2021-04-19 20:14:37
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: M. Dennefeld (IAP), A. Floers (GSI), A. Holas, C. Vogl, S. Taubenberger, G. Csoernyei (MPA), R. Carini (INAF Roma), C. Gutierrez (Turku), T.-W. Chen, J. Sollerman (Stockholm), S. Benetti (INAF Padova), J. Anderson (ESO), T. Müller Bravo (Southampton), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Birmingham), O. Yaron (Weizmann), D. Young (QUB), 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 (QUB)
Source Group: ePESSTO+
Abstract:
This report includes classifications of two Type Ia's, one Type II, and one Type Ic.

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), and 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 April 18, 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 2021jyr [ATLAS21mws] 09:33:42.160 +09:55:36.37 SN Ia 0.104 SDSS J093341.59+095527.4 0.10377 ATLAS at max Redshift from known host. GELATO finds a good match with SN 2002bo at -2.1 d. The supernova is located very far from its host galaxy at a projected distance of 23.0 kpc. 09:33:42.145 +09:55:36.54 SN Ia 0.104
TNS 2021kax [ZTF21aavozbk] 12:59:50.599 +22:43:23.78 SN Ia 0.072 SDSS J125950.57+224325.2 0.072 ZTF, ATLAS -7 to -4 Redshift from narrow host galaxy H-alpha. GELATO finds a good match with SN 2003du at -4.9 d. 12:59:50.568 +22:43:23.85 SN Ia 0.072
TNS 2021jvf [ATLAS21mwj] 20:43:58.326 -20:40:29.72 SN Ic 0.0277 ESO 597- G 032 0.027712 ATLAS at max Redshift from known host. GELATO finds a good match with SN 1994I at maximum. 20:43:58.361 -20:40:29.60 SN Ic 0.0277
TNS 2021kfo [ZTF21aaweqit] 16:15:00.800 +06:13:19.07 SN II 0.06 SDSS J161500.69+061320.4 ZTF +4 to +7 Redshift from template matching with GELATO. We estimate a phase of around 4 d after explosion from the ZTF light curve. 16:15:00.811 +06:13:19.17 SN II 0.06

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