AstroNote 2019-8

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2019-05-03 00:35:57
Type: Object/s-Discovery/Classification
Classification of AT 2019ein as a young SN Ia-peculiar
Authors: Jamison Burke (Las Cumbres Observatory/UC Santa Barbara), Iair Arcavi (Tel Aviv University), D. Andrew Howell (LCO/UCSB), Daichi Hiramatsu (LCO/UCSB), Curtis McCully (LCO)
Source Group: Global SN Project

We report the classification of AT 2019ein as a young SN Ia-peculiar. Using Superfit (Howell et al. 2005, ApJ, 634, 1190) and SNID (Blondin & Tonry 2007, ApJ, 666, 1024), we find best fits to SNe Ia, including SN 2002bo 13 days before peak and SN 2001ay. The supernova is closest to NGC 5353 (z = 0.007755, DM = 32.2; NED values), but the features of the spectrum appear to be both blueshifted relative to the host and high-velocity. The Ca II IR triplet is highly blended with O I lines, creating an extremely broad and blended absorption feature. The high velocities suggest that the supernova was caught soon after explosion. Further follow up is encouraged.

Our classification spectrum is publicly available on the TNS.

Show current TNS values
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftRemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2019ein [ATLAS19ieo]13:53:29.134+40:16:31.4013:53:29.110+40:16:31.33SN Ia0.00775