AstroNote 2020-233

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2020-11-17 16:25:52
Type: Object/s-Discovery/Classification
ePESSTO+ spectroscopic classification of optical transients
Authors: M. Gromadzki, N. Ihanec (Warsaw), T. Wevers (ESO), C. Gutierrez, S. C. Williams (Turku), L. Galbany (Granada), T.-W. Chen (Stockholm), S. Schulze (Weizmann), J. Anderson (ESO), T. Muller Bravo (Southampton), C. Inserra (Cardiff), E. Kankare (Turku), M. Nicholl (Birmingham), O. Yaron, I. Manulis (Weizmann), D. Young (QUB)
Source Group: ePESSTO+
This report includes classifications of 5 Type Ia's, a superluminous supernova, and a tidal disruption event. The TDE appears to have a fast rise and was discovered before peak. Swift follow-up observations have been approved.

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 Lasair broker (Smith, Williams, Young et al. 2019 2019RNAAS...3a..26S).

Observations were performed on the ESO New Technology Telescope (NTT) at La Silla on the night of 2020 November 16, 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
TNS2020zjv [ZTF20acpwjus]09:26:33.258-01:39:01.16SN Ia-91T-like0.075SDSS J092633.20-013900.30.075-10 to -7 daysredshift from host galaxy09:26:33.258-01:39:01.01SN Ia-91T-like0.075
TNS2020znr [ZTF20acphdcg]07:19:06.423+23:53:07.32SLSN-I0.1-20 daysredshift from Gelato. Good match to PTF09cnd at -20d07:19:06.420+23:53:07.37SLSN-I0.1
TNS2020zpe [ZTF20acqelhh]04:56:03.770-25:09:03.94SN Ia0.06WISEA J045603.47-250905.2-10 to -6 daysredshift from SNID04:56:03.780-25:09:04.00SN Ia0.06
TNS2020zpf [ZTF20acppsay]23:12:40.485-11:56:02.24SN Ia0.1WISEA J231240.50-115602.4-7 to -3 daysredshift from SNID23:12:40.484-11:56:02.05SN Ia0.1
TNS2020zpi [ZTF20acqksdi]02:40:20.447-01:26:48.93SN Ia0.04CGCG 388-0920.037056-12 to -10 daysredshift from SNID02:40:20.450-01:26:48.70SN Ia0.04
TNS2020zwe [ZTF20acpprmy]23:30:16.517-12:40:04.64SN Ia0.08-6 to -1 daysredshift from SNID23:30:16.517-12:40:04.64SN Ia0.08
TNS2020zso [ZTF20acqoiyt]22:22:17.131-07:15:59.00TDE0.061SDSS J222217.13-071558.90.061Broad, blueshifted He II 4686 emission; redshift from host galaxy emission lines.22:22:17.130-07:15:59.08TDE0.061