AstroNote 2021-165

Primary tabs

DRAFT
2021-05-23 16:34:55
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: P. Charalampopoulos, M. Pursiainen (DTU Space), E. Paraskeva (IAASARS/NOA), G. Leloudas (DTU Space), C. Gutierrez (Turku), T.-W. Chen (Stockholm), Georgios Dimitriadis (TCD), 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), 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 2 supernovae : one Type Ia and one likely SLSN I.

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).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2019 May 22, 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
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftSourcePhase (days)RemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2021lji [ZTF21aaxtgsv]15:20:53.831+02:12:47.87SLSN-I0.12ZTFAround maxSelected as a candidate SLSN in AstroNote 2021-154. Best fit with SN 2011ke at z = 0.12. Redshift from SNID. At this redshift the absolute magnitude is -19.6 mag.15:20:53.831+02:12:47.87SLSN-I0.12
TNS2021mwx [ATLAS21pkk]11:41:48.343-24:31:32.56SN Ia-91T-like0.1ATLAS-7 to -4Pre-max SN Ia, most likely of the 91T-like or 99aa-like sub-class. Redshift from SNID11:41:48.323-24:31:32.52SN Ia-91T-like0.1