AstroNote 2021-61

Primary tabs

2021-02-12 17:11:31
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: S. Prentice, M. Deckers, J. Terwel, M. Magee (TCD), C. Barbarino (Stockholm), G. Pignata (UANB), T. Müller Bravo (Southampton), S. Benetti (INAF), J. Anderson (ESO), T.-W. Chen (Stockholm), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Birmingham), O. Yaron, N. L. Strotjohann (Weizmann), D. Young (QUB), I. Manulis (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 (QUB)
Source Group: ePESSTO+
This report includes classifications of 3 Type Ia SNe and 1 Type II SN. For AT2021ckl the observed spectrum is consistent with only host galaxy light. The acquisition image of ZTF21aajezvp did not show any source to take a spectrum of.

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

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2021 Feb. 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 (via WISeREP) and the IAU Transient Name Server.

The classified objects are listed in the Related Objects table below.

Show current TNS values
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftSourcePhase (days)RemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2021coe [ZTF21aaisnth]13:19:54.193+00:30:37.83SN Ia-pec0.054WISEA J131954.18+003043.30.0544maxz from host, similar to 91T-like and 00cx-like SN13:19:54.193+00:30:37.83SN Ia-pec0.054
OtherZTF21aajezvp10:12:58.495+15:04:23.77No source visible in acquisition image
TNS2021cku [ATLAS21eek]12:58:41.642-30:33:39.12SN Ia0.043maxz from snid12:58:41.642-30:33:39.12SN Ia0.043
TNS2021cpi [ATLAS21etj]14:51:57.421+16:13:18.67SN II0.055WISEA J145157.76+161324.30.055322youngz from host, blue and featureless spectrum14:51:57.421+16:13:18.67SN II0.055
TNS2021cky [ATLAS21eev]15:17:35.403+18:07:05.06SN Ia-pec0.073WISEA J151735.40+180705.10.073437maxz from host, similar to 91T-like and 00cx-like SN15:17:35.403+18:07:05.06SN Ia-pec0.073
TNS2021ckl15:05:43.842+09:58:21.60Galaxy0.0442MASX J15054383+09582160.043971Consistent with only host galaxy light15:05:43.842+09:58:21.60Galaxy0.044