Spectroscopic classification of 3 transients with Keck and DEIMOS

: Tomasella, L., Benetti, S., Cappellaro, E., Turatto, M.

: 2020

: Astronomer's Telegram

: 14027

: http://www.astronomerstelegram.org/?read=14027

We report the spectroscopic classification of 1 supernova and 2 AGN, discovered by ATLAS (Tonry et al. 2016; ATel #8680), the Pan-STARRS Survey for Transients (PSST; Chambers et al. arXiv:1612.05560; Huber et al. ATel #7153) and the YSE collaboration (Jones et al. ATel #13330) The observations were performed with the DEep Imaging Multi-Object Spectrograph (DEIMOS) mounted on the 10-m Keck II telescope (range 400-900 nm; resolution 0.35 nm). Survey Name | IAU Name | Discovery MJD | Discovery mag | z | Type | Phase | Notes ATLAS20xqi | SN 2020rmv | 59077.50 | 19.5 | 0.27 | SLSN-I | near peak | (1) PS20gxa | AT 2019aafl | 58508.25 | 22.01 | 0.811 | Type-I AGN | - | (2) PS20eor | AT 2020nso | 59027.57 | 21.13 | 0.563 | Type-I AGN | - | (3) (1) SN 2020rmv was first reported by ATLAS on 2020-08-16.5 (MJD 59077.5) but the Zwicky Transient Facility (Kulkarni ATel #11266) reported later a first detection on 2020-07-31 (MJD 59061.43)....