DRAFT
2023-04-18 12:45:06
Type: Object/s-Data/Analysis
Bibcode: 2023TNSAN..88....1P
Follow-up observations of Type Icn SN 2023emq: transition to a Type Ibn SN
Authors: M. Pursiainen, G. Leloudas (DTU Space)
Keywords: Spectroscopy, Supernova
Abstract:
We report a spectral transition of SN 2023emq from a Type Icn SN into a Type Ibn SN

We report that a spectrum of SN 2023emq obtained with ALFOSC spectrograph mounted on the Nordic Optical Telescope (NOT) approximately one week after peak brightness (UT 2023-04-14 01:09:49) is dominated by narrow HeI emission features over a blue continuum. The spectrum closely resembles those of Type Ibn SNe at a similar phase (comparison attached).  Based on the emission lines the redshift is ~0.035. Follow-up observations are encouraged.

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 2023emq 13:34:22.033 -23:43:51.45 SN Ibn/Icn 0.035 13:34:22.033 -23:43:51.45 SN Icn 0.031
AstroNote Publication Timestamp Title Authors
2023-75 2023-04-06 19:27:17 Classification of AT 2023emq as a Type Icn Supernova Craig Pellegrino, Estefania Padilla Gonzalez, Joseph Farah, D. Andrew Howell, Curtis McCully, Megan Newsome, Giacomo Terreran (Las Cumbres Observatory)
File Comments
SN2023emq_Ibn_comp.pdf Comparison of the NOT spectrum of SN2023emq and spectrum of Type Ibn SN 2006jc.

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