DRAFT
2021-05-05 15:16:39
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: E. Paraskeva (IAASARS, NOA), M. Pursiainen, G. Leloudas, D. B. Malesani (DTU Space), L. Galbany (Granada), R. Carini (INAF Roma), S. Srivastav (QUB), 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), N. L. Strotjohann (Weizmann)
Source Group: ePESSTO+
Abstract:
This report includes classifications of 1 type Ia (SN 2021knh) and 1 type Ic-peculiar SN (SN 2021krf). SN 2021krf presents some similarities with the peculiar type-Ic SN 2005ek, as it shows C II lines and has a relatively short rise time (probably < 10 d).

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 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 4, 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 2021krf [ZTF21aaxtctv] 12:51:17.439 +00:31:14.51 SN Ic-pec 0.013565 2MASX J12511712+0031138 0.013565 ZTF pre-max Good match with peculiar Ic SN 2005ek; shows C II lines 12:51:17.443 +00:31:14.73 SN Ic 0.01356
TNS 2021knh [ZTF21aaxjpsw] 09:10:08.633 -27:37:26.60 SN Ia 0.03 ZTF -7 to -4 Redshift from SNID SN fit 09:10:08.650 -27:37:26.58 SN Ia 0.03

Comments