Spectroscopic Classifications of Optical Transients with SOAR

ATel #11557; Y.-C. Pan, R. J. Foley (UCSC), S. W. Jha (Rutgers), A. Rest (STScI), D. Scolnic (Chicago/KICP)
on 21 Apr 2018; 22:06 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 the Goodman spectrograph on the Southern Astrophysical Research (SOAR) telescope. Targets were supplied by the Pan-STARRS Survey for Transients, ASAS-SN and DECam (ATEL #11344). All observations were made on 2018 April 21 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name        | IAU Name  | RA (J2000)  | Dec (J2000)  |   z   | Type | Phase |  Notes
 
PS18kx      | AT2018adf | 13:18:42.80 | -00:45:33.00 | 0.113 |  Ia  | +20 d | (1) 
PS18mq      | AT2018ajg | 13:19:59.40 | -10:28:49.10 | 0.056 |  Ic  |       | (2,5) 
AT2018aru   | AT2018aru | 13:22:18.80 | -01:52:52.00 | 0.047 |  II  |       | (3,6) 
PS18oc      | AT2018auo | 13:29:40.30 | -04:41:19.00 | 0.105 |  Ia  |  +1 d | (4,7) 
ASASSN-18hw | AT2018aum | 14:22:02.50 | -28:02:30.80 | 0.025 |  II  |       | (8) 

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)-(4) Targets discovered in the Kepler K2 C17 field. (5) Classification somewhat uncertain, with some similarity to SNe II as well. (6) We measure a H alpha velocity of -7,600 km/s (7) We measure a Si II 6355 velocity of -11,600 km/s (8) We measure a H alpha velocity of -10,400 km/s