AstroNote 2020-127

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2020-06-26 10:46:15
Type: Object/s-Discovery/Classification
Classification of SN2020nlb as a type-Ia supernova in Messier 85
Authors: Achille Fiore (INAF-OaPd), Morgan Fraser (University College Dublin), Rubina Kotak (University of Turku), Steve Williams (University of Turku), Stefano Benetti (INAF-OaPD), Andrea Pastorello (INAF-OaPD)
Keywords: Supernova
We report the NUTS2/OPTICON classification of the transient SN2020nlb (AT2020qoq) in the galaxy MESSIER 85. The spectrum is consistent with a very young SN Ia.

Following the ATLAS detection of the transient AT2020nlb (ATLAS20qoq)
in the nearby galaxy MESSIER 85, we triggered our NUTS2/OPTICON follow up.
Observations were taken on UT 2020-06-25 with gr4 grism and the 1.0" slit.
The reduced spectrum shows an expansion velocity of ~14800 km/s as deduced from the 
SiII 6355A absorption at a redshift z=0.002432. 
The spectrum looks then similar to the spectra of some normal and under-energetic
SNIa well before maximum. The photometry and constraining non-detection reported
by ATLAS (Townsend et al. 2020) are also consistent with a SN Ia few days after explosion.

Show current TNS values
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftRemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2020nlb [ATLAS20qoq]12:25:24.181+18:12:12.52SN Ia0.00243212:25:24.188+18:12:12.80SN Ia