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Spectroscopic classification of nine optical transients from ASASSN, ATLAS, Gaia, and Pan-STARRS1

ATel #10517; Syed Uddin (Purple Mountain Observatory), Jeremy Mould (Swinburne University of Technology), Ju-Jia Zhang (Yunnan Observatories), Brad Tucker (Mt Stromlo Observatory, ANU), Lifan Wang (Purple Mountain Observatory and TAMU), Xiaofeng Wang (Tsinghua University)
on 22 Jun 2017; 16:29 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Syed Uddin (saushuvo@gmail.com)

Subjects: AGN, Supernovae, Transient, Variables

Referred to by ATel #: 10539

On UT June 20, 2017, we obtained spectra of nine optical transients with the Wide Field Spectrograph (WiFeS - Dopita et al., 2007, ApSS, 310, 255) on board 2.3m ANU telescope at Siding Spring Observatory. We classify four of them as Type Ia Supernova (SN Ia) by cross-correlating with a library of supernova spectra using the "Supernova Identification" code (Blondin & Tonry, 2007, ApJ, 666, 1024). The other five transients, fainter than 19 mag, did not show any supernova spectral feature. Of them, one transient turns out to be an AGN, one M-dwarf, and the rest are galaxies. We present results in the following table:

ATel Name ATel No. Type Phase Redshift
AT2017eve ASASSN-17hq ATel #10509 SN Ia +2 0.031
AT2017erv ASASSN-17ho ATel #10509 SN Ia -2 0.013
AT2017esb ASASSN-17hp ATel #10508 SN Ia +13 0.032
AT2017evb ATLAS17hcs ------ SN Ia -5 0.032
AT2017ebg Gaia17bfk ------ Galaxy -- 0.001
AT2017ejx ASASSN-17he ATel #10463 Galaxy -- 0.008
AT2017evh PS17dkn ------ Galaxy -- 0.250
AT2017evi PS17dkm ------ AGN -- 0.073
AT2017eqc PS17dhq ------ M-dwarf -- 0.000