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Spectroscopic Classifications of Optical Transients with Mayall/KOSMOS

ATel #10602; M. R. Siebert, D. A. Coulter, Y.-C. Pan, R. J. Foley (UCSC), S. W. Jha (Rutgers), A. Rest (STScI), D. Scolnic (Chicago/KICP)
on 27 Jul 2017; 20:12 UT
Credential Certification: Yen-Chen Pan (ypan6@ucsc.edu)

Subjects: Optical, Supernovae

We report the following classifications of optical transients from spectroscopic observations with KOSMOS on the KPNO Mayall 4-m telescope. Targets were supplied by the ASAS-SN and ATLAS. All observations were made on 2017 July 27 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name        | IAU Name  | RA (J2000)  | Dec (J2000)  | z     | Type | Phase | Notes
ATLAS17ivr | AT2017fow | 14:29:44.86 | +67:38:53.30 | 0.066 | Ia | -2 d | (1) ASASSN-17jo | AT2017fqh | 02:42:58.95 | -10:07:26.00 | 0.054 | Ia | +5 d | (2)

Notes: When the redshift is given to 2 decimal places, it is derived from the SN spectrum. Otherwise, the redshift is determined from the host galaxy. (1) We measure a Si II 6355 velocity of -11,000 km/s. (2) We measure a Si II 6355 velocity of -9,900 km/s.