AstroNote 2021-111

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2021-04-05 16:03:32
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: P. Pessi (ESO), A. Mitra (Nazarbayev Uni; KBTU), M. Toy, P. Wiseman, T. Müller Bravo, C. Frohmaier (Southampton), T. Nagao (Turku), L. Galbany (Granada), S. Srivastav (QUB), S. Benetti (INAF), J. Anderson (ESO), T.-W. Chen (Stockholm), M. Gromadzki (Warsaw), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Birmingham), O. Yaron (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 (QUB)
Source Group: ePESSTO+
This report includes classifications of 6 Type Ia's, 1 Type Ic, 4 Type II's, and a CV. SN2021fox shows particularly strong and broad HeI5876+NaID.

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 the ATLAS survey (Smith et al. 2020 2020arXiv200309052S), 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, and by the ESA Gaia Photometric Science Alerts Team DPAC.

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2021 April 04, 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.

SN2021dqw was reported in AstroNote 2021-102 as a potential SLSN.

Show current TNS values
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftSourcePhase (days)RemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2021dqw [ZTF21aamwvhr]16:06:38.926+16:14:07.21SN II0.04ZTFpost-maxRedshift from SNID fit16:06:38.926+16:14:07.21SN II0.04
TNS2021htw [ATLAS21job]05:53:29.529-35:02:07.02SN Ia0.08ATLASaround maxRedshift and phase from SNID fit05:53:29.529-35:02:07.02SN Ia0.08
TNS2021hfq [Gaia21bnr]07:57:54.900-67:43:53.15SN Ia0.08Gaia+10Redshift and phase from SNID fit07:57:54.900-67:43:53.15SN Ia0.08
TNS2021hvo [ATLAS21jom]13:22:51.335-40:46:36.15SN Ia0.051ATLASaround maxRedshift from narrow host galaxy emission lines13:22:51.335-40:46:36.15SN Ia0.051
TNS2021fox [ATLAS21hzm]09:57:36.350-13:41:45.38SN II0.03172MASXJ09573643-13414920.0317ATLASRedshift from known host09:57:36.360-13:41:45.42SN II0.032
TNS2021hpv [ATLAS21jlk]10:02:57.350-11:44:01.40SN Ic0.029MGC-02-26-0230.029ATLAS+13Phase from SNID fit, redshift from known host10:02:57.332-11:44:01.54SN Ic0.029
TNS2021hkf [ZTF21aaqyuun]11:44:23.277+08:10:41.44SN II0.02SDSS J114422+081031.20.02ZTFRedshift from known host11:44:23.266+08:10:41.52SN II0.02
TNS2021fzq [ZTF21aapjmpq]15:01:07.290+12:18:50.36SN Ia-91T-like0.13SDSS J150107.30+121850.0ZTF-1Redshift and phase from SNID fit15:01:07.290+12:18:50.36SN Ia-91T-like0.13
TNS2021hse [ZTF21aarjehy]16:05:56.888+14:40:42.58SN II0.04SDSS J160557.30+144044.3ZTFRedshift from narrow H-alpha in the transient spectrum16:05:56.888+14:40:42.58SN II0.04
TNS2021hgd [Gaia21boh]13:33:48.430-53:20:04.92CVGaia13:33:48.430-53:20:04.92CV
TNS2021hwk [ZTF21aasbxng]14:19:02.720-07:23:26.14SN Ia0.041LEDA 1019808ZTF-10Redshift from host H-alpha emission; phase from SNID fit14:19:02.720-07:23:26.14SN Ia0.041
TNS2021hji [ZTF21aaqztcg]16:48:41.125+21:59:50.01SN Ia0.057WISEA J164841.04+215950.80.057739ZTF-10Redshift from known host; phase from SNID fit16:48:41.125+21:59:50.01SN Ia0.057