[ Previous | Next | ADS ]

Spectroscopic classification of optical transients with the SEDM (Spectral Energy Distribution Machine) on Palomar 60-inch (P60) telescope

ATel #9279; N. Blagorodnova, D. Neill, R. Walters (Caltech)
on 30 Jul 2016; 02:23 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Nadejda Blagorodnova (nblago@ast.cam.ac.uk)

Subjects: Cataclysmic Variable, Supernovae, Transient

The Caltech Time Domain Astronomy group reports the classification of the optical transients SN 2016czr, SN 2016ejc and AT 2016eki. The candidates were discovered by the PMO-Tsinghua Supernova Survey (PTSS: http://119.78.210.3/ptss2/ ), the Gaia ESA survey (Rixon et al,2014, ATel #6593) and the All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014, ApJ, 788, 48 and http://www.astronomy.ohio-state.edu/~assassin/index.shtml ). The observations were performed on 2016-07-28 and 2016-07-29 with the Palomar 60-inch (P60) telescope and the Spectral Energy Distribution Machine (SEDM) (http://www.astro.caltech.edu/sedm/, range 350-950nm, spectral resolution R~100) on Palomar 60-inch (P60) telescope.

 
Survey Name             |  IAU Name  | RA (J2000)  | Dec (J2000)  | redshift   |  Discovery (UT)      |  Classification (UT) | Discovery mag |  Type                    | Phase    | Notes 
 
PTSS-16jvj (Gaia16awh)  | SN 2016czr |  16:45:37.3 | +21:49:19.3  | 0.04       | 2016-07-08 13:56:32  | 2016-07-28 08:14:58.9 |        18.1           |   SN Ia   |  +16 d     | (1) 
Gaia16awi               | SN 2016ejc |  16:18:18.3 | +42:36:14.9  | 0.05       | 2016-07-24 12:40:19  | 2016-07-28 07:23:17.4 |       18.86          |   SN Ia    |  +16 d   | (2) 
Gaia16aws (ASASSN-16hu) | AT 2016eki |  17:09:03.6 | -06:31:18.7  | 0.00       | 2016-07-26 11:57:07  | 2016-07-29 05:22:38.6 |       16.97          |   CV        |  +3 d     | (3) 

(1) Gaia photometry shows an increase in G-band from 16.97 to 16.15 magnitudes in 7.7 hours.
Classifications were performed using SNID (Blondin and Tonry 2007, ApJ, 666, 1024).
We acknowledge ESA Gaia (http://cosmos.esa.int/gaia), and the DPAC Photometric Science Alerts Team (http://gaia.ac.uk/selected-gaia-science-alerts).