DRAFT
2019-08-01 14:06:41
Type: Object/s-Discovery/Classification
Bibcode: 2019TNSAN..59....1N
C-SNAILS spectra of optical transients
Authors: Matt Nicholl, Phil Short, Andy Lawrence, Nic Ross (Edinburgh), Stephen Smartt (QUB)
Source Group: C-SNAILS
Keywords: Time-domain, Surveys, Spectroscopy, Transient, Supernova, AGN, Optical
Abstract:
We announce the first observations from C-SNAILS: the Classification Survey for NucleAr transients with Liverpool and LaSair. C-SNAILS targets are selected automatically from the Zwicky Transient Facility public alerts stream using the Lasair broker. Classification spectra are obtained using the Liverpool Telescope and SPRAT. Our initial observations include 1 AGN, 1 SN Ia, and 1 likely SLSN IIn. Additionally, we have identified 4 nuclear transients showing relatively featureless blue continua, at z~0.07-0.15. Follow-up of these sources is encouraged.

We announce the first observations from C-SNAILS: the Classification Survey for NucleAr transients with Liverpool and LaSair.

Targets are selected automatically from the Zwicky Transient Facility public alerts stream (Kulkarni 2018) using the Lasair broker (Smith, Williams, Young et al. 2019) and observed spectroscopically using SPRAT (Piascik et al. 2014) on the Liverpool Telescope (Steele et al. 2004). Classifications were done using DASH (Muthukrishna et al. 2019), SNID (Blondin & Tonry 2007) and GELATO (Harutyunyan et al. 2008)

Our initial observations include 1 AGN, 1 SN Ia, and 1 likely SLSN IIn. Additionally, we have identified 4 nuclear transients showing relatively featureless blue continua, at z~0.07-0.15. Follow-up of these sources is encouraged.

AT2019meg is particularly interesting as it has an absolute peak magnitude of -20.1 mag, and exhibits a possible bump or plateau in the early ZTF light curve.

Show current TNS values
Catalog Name Reported RA Reported DEC Reported Obj-Type Reported Redshift Host Name Host Redshift Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2019meh [ZTF19abclykm] 21:27:17.452 +64:24:59.17 SLSN-II 0.093 Narrow/intermediate width Balmer and He I emission. Correcting for Galactic extinction Av~2mag gives a blue continuum and a peak luminosity ~ -22.5 mag 21:27:17.450 +64:24:59.18 SLSN-II 0.0935
TNS 2019mei [ZTF19abcudso] 19:57:19.998 +09:31:32.35 AGN 0.212 19:57:20.000 +09:31:32.41 AGN 0.212
TNS 2019lky [ZTF19abgjlef] 00:29:47.679 +17:33:26.90 SN Ia 0.058 00:29:47.679 +17:33:26.90 SN Ia 0.058
TNS 2019lby [ZTF19abfpvle] 21:14:04.522 -11:35:26.83 SN I 0.1 Redshift from template matching. DASH prefers an SN Ib classification, but good matches are also found with SNe Ia. Spectrum includes substantial host contribution. 21:14:04.522 -11:35:26.83
TNS 2019lse [ZTF19abhisnk] 01:54:50.725 +41:05:48.32 Other 0.079 Blue continuum, host emission lines 01:54:50.725 +41:05:48.32
TNS 2019mal [ZTF19abidfsb] 23:09:06.584 -17:40:27.34 Other 0.076 Blue continuum, host emission lines 23:09:06.581 -17:40:27.23 SN Ia 0.083
TNS 2019meg [ZTF19abhhjcc] 18:45:16.178 +44:26:19.14 Other 0.152 Blue continuum, host emission lines. At this redshift the transient has an absolute mag ~ -20.1. Early light curve may exhibit a bump/plateau. 18:45:16.180 +44:26:19.21
TNS 2019lwu [ZTF19abidbya] 23:11:12.315 -01:00:10.80 Other Blue continuum, agrees with ePESSTO+ observations (AstroNote #2019-58) 23:11:12.305 -01:00:10.71 TDE 0.117

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