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Spectroscopic Classifications of Optical Transients with SOAR

ATel #10437; Y.-C. Pan, D. K. Reed, M. S. Medallon, R. J. Foley (UCSC), S. W. Jha (Rutgers), A. Rest (STScI), D. Scolnic (Chicago/KICP)
on 29 May 2017; 19:52 UT
Credential Certification: Yen-Chen Pan (ypan6@ucsc.edu)

Subjects: Optical, Supernovae

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 ASAS-SN, DLT40 and Gaia. All observations were made on 2017 May 29 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name        | IAU Name  | RA (J2000)  | Dec (J2000)  | z     | Type    | Phase |  Notes
DLT17bk | AT2017ejb | 12:48:36.01 | -41:19:33.53 | 0.009 | Ia-91bg | -8 d | (1) ASASSN-17gu | AT2017eip | 11:51:31.08 | +15:27:26.21 | 0.021 | Ia | -3 d | (2) Gaia17bjk | AT2017eit | 12:35:08.28 | -27:56:26.38 | 0.029 | II | +10 d |

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) SN 1991bg-like object with relatively strong C II 6580 absorption. We measure Si II 6355 and C II 6580 velocities of -11,900 km/s and -11,200 km/s, respectively. (2) We measure a Si II 6355 velocity of -11,100 km/s.