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Spectroscopic observations of ATLAS17lcs (SN 2017guv) and ASASSN-17mq (AT 2017gvo) by NUTS (NOT Un-biased Transient Survey)

ATel #10805; Subo Dong, Subhash Bose (KIAA-PKU), M. Stritzinger, S. Holmbo (Aarhus), M. Fraser (UCD), G. Fedorets (IAC), on behalf of the NUTS collaboration
on 2 Oct 2017; 04:51 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Subo Dong (dongsubo@pku.edu.cn)

Subjects: Optical, Supernovae, Transient

The Nordic Optical Telescope (NOT) Unbiased Transient Survey (NUTS; ATel #8992) reports the spectroscopic classification of ATLAS17lcs (SN 2017guv) and ASASSN-17mq (AT 2017gvo) in host galaxies 2MASX J19132225-1648031 and CGCG 225-050, respectively. The candidates were discovered by the ATLAS survey, see Tonry et al. (2011, PASP, 123, 58) and Tonry et al. (ATel #8680) and the All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014, ApJ, 788, 48 and http://www.astronomy.ohio-state.edu/~assassin/index.shtml ).

The observations were performed with the 2.56 m Nordic Optical Telescope equipped with ALFOSC (range 350-950 nm; resolution 1.6 nm FWHM).

 
Survey Name    | IAU Name    | Discovery (UT)  | Discovery mag | Observation (UT) | Redshift | Type    | Phase   | Notes  
ATLAS17lcs     | SN 2017guv  | 2017-09-15.31   | 17.6          | 2017-09-28.85    | 0.023806 | Ia      | +3d     | (1)  
ASASSN-17mq    | AT 2017gvo  | 2017-09-17.25   | 17.5          | 2017-09-28.87    | 0.054831 | galaxy  | —-      | (2)  

(1) The best match using SNID is type Ia supernova SN 2004eo at phase ~3 days, and the best-fit SN redshift is consistent with the host redshift via NED (z_host = 0.023806). (2) The spectrum is consistent with a galaxy at the host redshift (z_host = 0.054831) according to NED.

Classifications were performed using SNID (Blondin and Tonry 2007, ApJ, 666, 1024) tools. Calibrated spectra and additional information can be retrieved in the IAU Transient Name Server.