Spectroscopic Classifications of Optical Transients with Mayall/KOSMOS

ATel #10601; D. A. Coulter, M. R. Siebert, Y.-C. Pan, R. J. Foley (UCSC), S. W. Jha (Rutgers), A. Rest (STScI), D. Scolnic (Chicago/KICP)
on 27 Jul 2017; 05:45 UT
Credential Certification: Yen-Chen Pan (ypan6@ucsc.edu)

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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, Gaia and PSST. All observations were made on 2017 July 26 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name        | IAU Name  | RA (J2000)  | Dec (J2000)  | z     | Type    | Phase | Notes
 
PS17dpp     | AT2017fax | 23:03:56.38 | +30:09:28.80 | 0.023 | Ia-91bg |  +7 d | 
Gaia17bux   | AT2017fpt | 01:56:27.75 | +36:48:00.22 | 0.020 | Ia      | +71 d |  
ASASSN-17jq | AT2017fra | 15:31:51.60 | +37:24:45.18 | 0.030 | Ia-91T  |  -8 d | 
ASASSN-17jt | AT2017frb | 21:11:36.85 | +11:29:50.82 | 0.029 | Ia      |  +6 d | (1) 

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 Na D EW of 1.4 A. We measure a Si II 6355 velocity of -10,300 km/s.