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Spectroscopic Classifications of Optical Transients with Mayall/KOSMOS

ATel #10654; E. Xhakaj, C. Rojas-Bravo, M. M. Foley, C. D. Kilpatrick, Y.-C. Pan, R. J. Foley (UCSC), S. W. Jha (Rutgers), A. Rest (STScI), D. Scolnic (Chicago/KICP)
on 18 Aug 2017; 17:41 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 ATLAS and Gaia. All observations were made on 2017 Aug 15 and 16 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name       | IAU Name  | RA (J2000)  | Dec (J2000)  | z     | Type | Phase | Notes
ATLAS17huo | AT2017fco | 23:21:04.91 | +03:30:00.05 | 0.036 | Ia | +30 d | Gaia17bxm | AT2017fvf | 03:17:53.31 | -07:18:00.97 | 0.017 | II | | Gaia17byx | AT2017fxh | 15:30:40.53 | +45:58:51.78 | 0.065 | Ia | +3 d | (1) ATLAS17jef | AT2017fwn | 00:58:46.54 | +13:39:15.52 | 0.039 | Ia | -1 d | (2) Gaia17cal | AT2017gap | 17:05:27.96 | +69:13:19.27 | 0.05 | Ia | +0 d | ATLAS17jlc | AT2017gau | 15:01:15.72 | +58:03:41.69 | 0.074 | Ia | +1 d | (3)

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 -10,400 km/s. (2) We measure a Si II 6355 velocity of -11,200 km/s. (3) We measure a Si II 6355 velocity of -11,300 km/s.